Moxa Technologies UC-8100-LX Mounting instructions

UC-8100-LX Software Manual
Second Edition, March 2015
www.moxa.com/product
© 2015 Moxa Inc. All rights reserved.

UC-8100-LX Software Manual
The software described in this manual is furnished under a license agreement and may be used only in accordance with
the terms of that agreement.
Copyright Notice
© 2015 Moxa Inc. All rights reserved.
Trademarks
The MOXA logo is a registered trademark of Moxa Inc.
All other trademarks or registered marks in this manual belong to their respective manufacturers.
Disclaimer
Information in this document is subject to change without notice and does not represent a commitment on the part of
Moxa.
Moxa provides this document as is, without warranty of any kind, either expressed or implied, including, but not limited
to, its particular purpose. Moxa reserves the right to make improvements and/or changes to this manual, or to the
products and/or the programs described in this manual, at any time.
Information provided in this manual is intended to be accurate and reliable. However, Moxa assumes no responsibility for
its use, or for any infringements on the rights of third parties that may result from its use.
This product might include unintentional technical or typographical errors. Changes are periodically made to the
information herein to correct such errors, and these changes are incorporated into new editions of the publication.
Technical Support Contact Information
www.moxa.com/support
Moxa Americas
Toll-free: 1-888-669-2872
Tel: [phone]
Fax: [phone]
Moxa China (Shanghai office)
Toll-free: 800-820-5036
Tel: [phone]
Fax: [phone]
Moxa Europe
Tel: [phone]
Fax: [phone]
Moxa Asia-Pacific
Tel: [phone]
Fax: [phone]
Moxa India
Tel: [phone]
Fax: [phone]

Table of Contents
1. Introduction...................................................................................................................................... 1-1
2. Getting Started.................................................................................................................................. 2-1
Software Architecture.......................................................................................................................... 2-3
Software Packages..............................................................................................................................2-3
Connecting to the UC-8100-LX .............................................................................................................2-3
Connecting through Serial Console ................................................................................................ 2-3
SSH Console...............................................................................................................................2-5
User Account Management................................................................................................................... 2-7
Switching to the Root Account ......................................................................................................2-7
Creating and Deleting User Accounts..................................................................................................... 2-7
Disabling the Default User Account .......................................................................................................2-7
Network Settings ................................................................................................................................ 2-8
Configuring Ethernet Interfaces.....................................................................................................2-8
Connecting to a Cellular Network...................................................................................................2-9
System Administration ........................................................................................................................2-9
Querying the Firmware Version .....................................................................................................2-9
Adjusting the Time ......................................................................................................................2-9
Setting the Time Zone ............................................................................................................... 2-10
Determining Available Drive Space...................................................................................................... 2-11
Enabling and Disabling Daemons ........................................................................................................ 2-11
Package Management........................................................................................................................ 2-12
Reboot/Shutdown the UC-8100-LX...................................................................................................... 2-13
3. Advanced Configurations on Peripherals........................................................................................... 3-1
Serial Ports ........................................................................................................................................3-2
stty ...........................................................................................................................................3-2
USB Port............................................................................................................................................3-3
Disable the USB Port....................................................................................................................3-3
USB Automount ..........................................................................................................................3-4
SD and MicroSD Slot ...........................................................................................................................3-4
Enabling Write Protection ............................................................................................................. 3-5
Preparing a Bootable SD Card ..............................................................................................................3-5
Creating a Linux System Image using a Windows Platform ...............................................................3-6
Creating a System Image in a Linux Environment............................................................................3-7
Booting Up the UC-8100-LX for the first time .........................................................................................3-8
File system resizing ..................................................................................................................... 3-8
Booting from a MicroSD Card (UC-8112 Model Only)........................................................................3-8
The Push Button and the LED indicators ................................................................................................3-8
Diagnosing Device and Subsystem Failures.....................................................................................3-9
Restoring Firmware to Factory Default...................................................................................................3-9
Using Cellular Modules ...................................................................................................................... 3-10
Cellular Signal Strength ............................................................................................................. 3-10
Cellular Dial-Up mode ................................................................................................................ 3-10
Cellular GPS Port ....................................................................................................................... 3-10
Configuring MC-7304/ MC-7354 Cellular Modules .......................................................................... 3-10
Configuring the Wireless LAN ............................................................................................................. 3-13
Configuring WPA2 Settings ......................................................................................................... 3-13
Connecting to an AP Using WEP Authentication ............................................................................. 3-14
Connecting to an AP Using WPA/WPA2 PSK Authentication ............................................................. 3-14
Using wpa_cli............................................................................................................................ 3-15
4. Security On UC-8100-LX.................................................................................................................... 4-1
Secure Boot .......................................................................................................................................4-3
Trusted Platform Module (TPM) and TrouSerS.........................................................................................4-4
Enabling TPM via the Bootloader ...................................................................................................4-5
Start TPM Services ...................................................................................................................... 4-5
Initializing the Trusted Platform Module..........................................................................................4-6
Getting the Public Endorsement Key ..............................................................................................4-6
Sealing/Unsealing Data ................................................................................................................4-7
SUDO Mechanism ...............................................................................................................................4-7
5. General Debian Package Usage ......................................................................................................... 5-1
NTP Client.......................................................................................................................................... 5-2
Execute Scheduled Commands with cron ...............................................................................................5-2
Updating System Time and RTC ....................................................................................................5-2
Rocket-Fast System for Log Processing: rsyslog .....................................................................................5-3
Rsyslog’s Configuration File .......................................................................................................... 5-3
Syntax of the Selector .................................................................................................................5-3
OpenSSL ...........................................................................................................................................5-4
Ciphers ...................................................................................................................................... 5-5

Cryptographic Hash Functions.......................................................................................................5-5
The Apache Web Server ......................................................................................................................5-5
Edit ServerName in Apache Configuration File .................................................................................5-5
SFTP ................................................................................................................................................. 5-6
DNS ..................................................................................................................................................5-6
IPTABLES ..........................................................................................................................................5-7
Observe and Erase Chain Rules .....................................................................................................5-9
Define Policy for Chain Rules....................................................................................................... 5-10
Append or Delete Rules.............................................................................................................. 5-11
rsync............................................................................................................................................... 5-12
Using rsync for External Backups................................................................................................. 5-12
Automating rsync Backups ......................................................................................................... 5-12
NAT ................................................................................................................................................ 5-13
NAT Example ............................................................................................................................ 5-13
Enabling NAT at Bootup ............................................................................................................. 5-13
NFS (Network File System) ................................................................................................................ 5-14
Setting up UC-8100-LX as an NFS Client ...................................................................................... 5-15
SNMP .............................................................................................................................................. 5-15
OpenVPN ......................................................................................................................................... 5-16
Static-Key VPN.......................................................................................................................... 5-17
Package Management........................................................................................................................ 5-18
apt-get .................................................................................................................................... 5-18
apt-cache ................................................................................................................................. 5-18
List All Available Packages .......................................................................................................... 5-18
Find Out Package Name and Description of Software ..................................................................... 5-18
Check Package Information ........................................................................................................ 5-18
Check Dependencies for Specific Packages ................................................................................... 5-18
Check statistics of Cache ............................................................................................................ 5-18
Update System Packages ........................................................................................................... 5-19
Install or Upgrade Specific Packages............................................................................................ 5-19
Upgrade All Software Packages ................................................................................................... 5-19
Install Multiple Packages ............................................................................................................ 5-19
Install Several Packages using Wildcard ....................................................................................... 5-19
Install Packages without Upgrading ............................................................................................. 5-19
Upgrade Specific Packages ......................................................................................................... 5-19
Install Specific Package Version .................................................................................................. 5-19
Remove Packages Without Configuration ...................................................................................... 5-20
Completely Remove Packages..................................................................................................... 5-20
Clean Up Disk Space.................................................................................................................. 5-20
Download Only Source Code of Package ....................................................................................... 5-20
Download and Unpack a Package ................................................................................................ 5-20
Download, Unpack and Compile a Package ................................................................................... 5-20
Download a Package Without Installing ........................................................................................ 5-20
Check Change Log of Package..................................................................................................... 5-20
Check Broken Dependencies ....................................................................................................... 5-21
Search and Build Dependencies................................................................................................... 5-21
Auto Clean Apt-Get Cache .......................................................................................................... 5-21
Auto Remove Installed Packages ................................................................................................. 5-21
6. Programmer's Guide ......................................................................................................................... 6-1
Linux Tool Chain Introduction............................................................................................................... 6-2
Native Compilation ......................................................................................................................6-2
Cross Compilation ....................................................................................................................... 6-2
Obtaining Help ............................................................................................................................6-4
Test Program—Developing Hello.c......................................................................................................... 6-4
Compiling Hello.c with Native Compilation ...................................................................................... 6-5
Compiling Hello.c with Cross Compilation .......................................................................................6-5
Makefile Example................................................................................................................................6-6
Modbus .............................................................................................................................................6-6
RTC (Real Time Clock).........................................................................................................................6-7
WDT (Watch Dog Timer)......................................................................................................................6-8
Cryptographic Hardware Accelerator .....................................................................................................6-9
Diagnostic LED ...................................................................................................................................6-9
Turn on LEDs API ........................................................................................................................6-9
Turn off LED API .........................................................................................................................6-9
Blink LED API..............................................................................................................................6-9
TPM ................................................................................................................................................ 6-10
A. Default Installed Package List........................................................................................................... A-1
B. Extending the Lifetime of the SD Card............................................................................................... B-1
Overview ...........................................................................................................................................B-2
SD Flash Types ...........................................................................................................................B-2
Tips for Running GNU/Linux on an SD Card............................................................................................B-2

Use SLC SD Card.........................................................................................................................B-2
Use an SD Card with Larger Capacity .............................................................................................B-2
Tweak GNU/Linux to Write to RAM Instead of the SD card. ...............................................................B-3
Set the SD Card to Read-only Mode...............................................................................................B-3
C. Copying Images on an SD/MicroSD Card........................................................................................... C-1
Using Win32 Disk Imager ....................................................................................................................C-1
Using the dd command........................................................................................................................C-2

1
1. 7BIntroduction
This is the programming and software operation manual for the Linux OS models of the UC-8100 series of
embedded computers.
The UC-8100 series of computers come in various models that provide a range of operating systems, ARM
architecture CPUs, and software enhancements. The following models are covered by this manual:
UC-8131-LX: RISC-based platform with 300 MHz CPU, 2 Ethernet, 1 Serial port, 1 GB SD, USB
Port and Debian ARM 7
UC-8132-LX: RISC-based platform with 300 MHz CPU, Mini PCIe socket for cellular, 2 Ethernet,
2 serial ports, 1 GB SD, USB port and Debian ARM 7
UC-8162-LX: RISC-based platform with 600 MHz CPU, Mini PCIe socket for cellular, 2 Ethernet,
2 serial ports, 1 GB SD, USB port and Debian ARM 7
UC-8112-LX: RISC-based platform with 1 GHz CPU, Mini PCIe socket for cellular, 2 Ethernet, 2
serial ports, 1 GB SD, USB port, TPM, Micro SD Socket, and Debian ARM 7

2
2.
8B
Getting Started
This chapter describes how to use configure the UC-8100 basic settings.
The following topics are covered in this chapter:

13BSoftware Architecture

14BSoftware Packages

15BConnecting to the UC-8100-LX

60B
Connecting through Serial Console

61B
SSH Console

16BUser Account Management

62B
Switching to the Root Account

17BCreating and Deleting User Accounts

18BDisabling the Default User Account

19BNetwork Settings

63B
Configuring Ethernet Interfaces

64B
Connecting to a Cellular Network

20BSystem Administration

65B
Querying the Firmware Version

66B
Adjusting the Time

67B
Setting the Time Zone

21BDetermining Available Drive Space

22BEnabling and Disabling Daemons

23BPackage Management

24BReboot/Shutdown the UC-8100-LX

UC-8100-LX Software Getting Started
2-2

UC-8100-LX Software Getting Started
2-3
13BSoftware Architecture
The Linux operating system that is pre-installed in UC-8100-LX series follows standard Linux architecture,
making it easy to accept programs that follow the POSIX standard. This computer uses the Debian ARM 7
distribution so that users can enjoy the full range of Debian software, and benefit from its strong community of
developers and documentation. With Debian ARM, the UC-8100-LX supports both native and cross compilation,
making programming on the computer more easy and straightforward.
The UC-8100-LX series image is partitioned into bootloader and Linux kernel, backup root file system and root
file system. Refer to the following image partition table for reference.
Partition System Content Partition Format Partition Size
1 Bootloader and Linux kernel W95 FAT32 32 MB
2 Backup root file system EXT4 128 MB
3 Root file system EXT4 Rest of the capacity
The default file system format of UC-8100 Series is EXT4. It is a journaling file system for Linux, developed as
the successor to EXT3. The journaling file system keeps track of the changes before committing them to the
main file system. In the event of a system crash or power failure, journaling file systems are quicker to bring
back online and less likely to become corrupted.
NOTE Click on the following links for more information on EXT4.
https://wiki.debian.org/Ext4
https://ext4.wiki.kernel.org/index.php/Ext4_Howto
14BSoftware Packages
Please refer to Apendix A to for default installed software packages. Most of the software packages come from
Debian community whereas the unique features of UC-8100-LX series such as the diagnostic LED, wireless
connection will be supported by Moxa. Please refer to Package Management section for how to manage the
software package on UC-8100-LX series.
15BConnecting to the UC-8100-LX
You will need another computer to connect to the UC-8100-LX and log on to the command line interface. There
are two ways to connect: through serial console cable or through Ethernet cable. You may refer to the
Hardware Manual to see how to connect them physically.
The default login user and password are:
Login: moxa
Password: moxa
They are the same for all serial console and ssh remote login. Root account login is disabled until you manually
create password for the account. User moxa is in the sudo group so you may operate system level commands
with this user by sudo command. See more detail in Sudo Mechanism section.
ATTENTION
For security reason, we recommend you to disable the default user account and create your own user accounts.
60BConnecting through Serial Console
This method is particularly useful when using the computer for the first time. The signal is transmitted over a
direct serial connection so you do not need to know either of its two IP addresses in order to connect to

UC-8100-LX Software Getting Started
2-4
UC-8100-LX. To connect through serial console, you need terminal software installed on your PC. Set the
following serial connection parameters on your PC terminal software.
Serial Console Port Settings
Baud rate 115200 bps
Parity None
Data bits 8
Stop bits: 1
Flow Control None
Terminal VT100
Below we will show how to use the terminal software to connect to the UC-8100-LX Series in Linux environment
and in Windows environment.
Linux Users
NOTE These steps are done on the Linux PC from which you want to connect to UC-8100-
LX, NOT to be done on the
UC-8100-LX
For Linux users, you may follow these steps to connect to UC-8100-LX Series from your personal computer.
1. Install minicom from the package repository of your operating system.
For Centos and Fedora:
user@PC1:~# yum -y install minicom
For Ubuntu and Debian:
user@PC2:~# apt-get install minicom
2. Use minicom –s command to enter configuration menu and setup the serial port settings.
user@PC1:~# minicom –s
3. Select Serial port setup.
4. Select Ato change the serial device. Note that you need to know which device node is connected to the
UC-8100-LX.
5. Select Eto configure the port settings according to the Serial Console Port Settings table provided.
6. Select Save setup as dfl (from the main configuration menu) to save as default value.

UC-8100-LX Software Getting Started
2-5
7. Select Exit from minicom (from the configuration menu) to leave the configuration menu.
8. Execute minicom after completing the above configurations.
user@PC1:~# minicom
Windows Users
NOTE These steps are done on the Windows PC from which you want to connect to UC-8100-
LX, NOT to be done on
the UC-8100-LX
For Windows users, follow these steps.
1. Download PuTTY http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html to set up serial
connection withr the UC-8100-LX in Windows environment. The following figure shows a simple example of
the configuration that is required.
2. Once the connection is established, the following window will open.
61BSSH Console
The UC-8100-LX supports SSH connection through Ethernet. Use the following default IP address of
UC-8100-LX to connect.
Port Default IP
LAN 1 192.168.3.127
LAN 2 192.168.4.127

UC-8100-LX Software Getting Started
2-6
Linux Users
NOTE These steps are done on the Linux PC from which you want to connect to UC-8100-
LX, NOT to be done on the
UC-8100-LX.
From a Linux computer, use ssh command to access from UC-8100-LX LAN1.
user@PC1:~ ssh [email protected]
Type yes to complete the connection.
The authenticity of host ‘192.168.3.127 (192.168.4.127)’ can’t be established.
RSA key fingerprint is 8b:ee:ff:84:41:25:fc:cd:2a:f2:92:8f:cb:1f:6b:2f.
Are you sure you want to continue connection (yes/no)?
yes_
ATTENTION
Rekey SSHD regularly
In order to secure your system, we suggest you do SSH-rekey regularly. Refer to the following steps.
cd /etc/ssh
sudo rm –rf
ssh_host_dsa_key ssh_host_ecdsa_key ssh_host_rsa_key
ssh_host_dsa_key.pub ssh_host_ecdsa_key.pub ssh_host_rsa_key.pub
sudo ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key
sudo ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key
sudo ssh-keygen -t ecdsa –f. /etc/ssh/ssh_host_ecdsa_key
When prompted for a passphrase, leave the passphrase empty and press enter.
Restart SSH
moxa@Moxa:~$ sudo /etc/init.d/ssh restart
For more information about SSH, refer to the following link.
https://wiki.debian.org/SSH
Windows Users
NOTE These steps are done on the Windows PC from which you want to connect to UC-8100-
LX, NOT to be done on
the UC-8100-LX
For Windows users, follow these steps.
1. Click on the link http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html to download PuTTY
(free software) to set up an SSH console for the UC-8100-LX in a Windows environment. The following
figure shows a simple example of the configuration that is required.

UC-8100-LX Software Getting Started
2-7
16BUser Account Management
62BSwitching to the Root Account
You can switch to root using sudo -i (or sudo su). For security reason, it is not suggested to operate all
commands by root account.
NOTE Click the following links for more information on sudo.
https://wiki.debian.org/sudo
ATTENTION
You may get permission denied while using pipe or redirect behavior with non-root account
You must use 'sudo su -c' to run the command instead of using >, <, >>, << etc..
. Note the quotes around the
full command:
17BCreating and Deleting User Accounts
You may use the command useradd and userdel to create and delete user accounts. Be sure to reference the
man page of these commands to set relevant previledge of the account. Following example shows to create a
test1 user in sudo group whose default login shell is bash and has home directory at /home/test1
moxa@Moxa:~# sudo useradd -m -G sudo -s /bin/bash test1
To edit the password of test1 use passwd and enter twice the password to confirm.
moxa@Moxa:~# sudo passwd test1
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
To delete user test1, you can use the command userdel
moxa@Moxa:# sudo userdel test1
18BDisabling the Default User Account
ATTENTION
You should first create a user account before you disable the default account.
You can use passwd command to lock the default user account so user moxa cannot login.
root@Moxa:# passwd –l moxa
To unlock the user moxa:
root@Moxa:# passwd –u moxa

UC-8100-LX Software Getting Started
2-8
19BNetwork Settings
63BConfiguring Ethernet Interfaces
After first login, you may configure the network setting on UC-8100-LX to better fit your application. Note that
it is more convenient to manipulate the network interface settings from serial console than from SSH login to
avoid reconnections.
Modifying Network Settings via the Serial Console
In this section, we use the serial console to configure network settings of the UC-8100-LX computer.
Follow the instructions given in a previous section to access the Console Utility of the target computer via the
serial Console port, and then type Moxa:~# cd /etc/network to change directories.
moxa@Moxa:~$ cd /etc/network/
moxa@Moxa:/etc/network/~$
Type Moxa:~# sudo vi interfaces to edit the network configuration file with vi editor. You can configure
Ethernet ports of the UC-8100-LX for static or dynamic (DHCP) IP addresses.
Static IP address
As shown below, 2 network addresses need to be modified: address, network, netmask, and broadcast.
The default IP address of the UC-8100-LX is 192.168.3.127 for LAN 1.
# interfaces(5) file used by ifup(8) and ifdown(8)
auto eth0 eth1 lo
iface lo inet loopback
# embedded ethernet LAN1
#iface eth0 inet dhcp
iface eth0 inet static
address 192.168.3.127
network 192.168.3.0
netmask 255.255.255.0
broadcast 192.168.3.255
# embedded ethernet LAN2
iface eth1 inet static
address 192.168.4.127
network 192.168.4.0
netmask 255.255.255.0
broadcast 192.168.4.255~

UC-8100-LX Software Getting Started
2-9
Dynamic IP addresses:
To configure one or both LAN ports to request an IP address dynamically, replace static with dhcp and then
delete the address, network, netmask, and broadcast lines.
Default Setting for LAN1 Dynamic Setting using DHCP
iface eth0 inet static
address 192.168.3.127
network: 192.168.3.0
netmask 255.255.255.0
broadcast 192.168.3.255
iface eth0 inet dhcp
# embedded ethernet LAN1
iface eth0 inet dhcp
64BConnecting to a Cellular Network
You can install cellular modules on UC-8100-LX series. Refer to Moxa Official Website or the product data for
compatible cellular modules.
The cellular connection utitlity is cell_mgmt. Once you have cellular module installed and SIM card inserted,
you may use the command to connect.
First, edit the APN name in /etc/qmi-network.conf:
moxa@Moxa:~$ echo “APN=internet” | sudo tee /etc/qmi-network.conf
And use the following command:
moxa@Moxa:~$ sudo cell_mgmt start
Please refer to Cellular Module section for more advanced settings.
20BSystem Administration
65BQuerying the Firmware Version
To check the firmware version of UC-8100-LX series, type:
moxa@Moxa:~$ kversion
UC-8112-LX version 1.0.0
Adding the –a option will give you the full build version:
moxa@Moxa:~$ kversion -a
UC-8112-LX version 1.0.0 Build 14050416
66BAdjusting the Time
The UC-8100-LX has two time settings. One is the system time, and the other is the RTC (Real Time Clock) time
kept by the UC-8100-LX hardware. Use the #date command to query the current system time or set a new
system time. Use #hwclock to query the current RTC time or set a new RTC time.
Use the command date MMDDhhmmYYYY to set the system time :
MM = Month
DD = Date
hhmm = hour and minute

UC-8100-LX Software Getting Started
2-10
YYYY = Yearmoxa@Moxa:~$ sudo date 071123192014
Mon Jul 11 23:19:00 UTC 2014
Use the following command to set the RTC time to system time:
moxa@Moxa:~$ sudo hwclock –w
moxa@Moxa:~$ sudo hwclock
Fri 11 Jul 2014 11:19:38 PM UTC -1.006862 seconds
NOTE Click the following links for more information on Datetime.
https://www.debian.org/doc/manuals/system-administrator/ch-sysadmin-time.html
https://wiki.debian.org/DateTime
67BSetting the Time Zone
There are two ways for supporting the timezone configuration on Moxa embedded computer. One is using the
TZ variable. The other is using /etc/localtime.
TZ variable
TZ environment variable format looks like this:
TZ=standardHH[:MM[:SS]][daylight[HH[:MM[:SS]]][,start date[/starttime], enddate[/endtime]]]
Here are some possible settings for the North American Eastern time zone:
TZ=EST5EDT
TZ=EST0EDT
TZ=EST0
In the first case, the reference time is GMT and thus stored time values are correct world wide. A simple change
of the TZ variable prints local time correctly, anywhere. In the second case, the reference time is Eastern
Standard Time and the only conversion performed is for Daylight Saving Time. Therefore, there is no need to
adjust the hardware clock for Daylight Saving Time twice per year. In the third case, the reference time is
always the time reported. This is suggested if the hardware clock on your machine automatically adjusts for
Daylight Saving Time or you insist on manually resetting the hardware time twice a year.
Adding in the file /etc/rc.d/rc.local, the timezone setting will be activated after the computer restarts.
moxa@Moxa:~$ export TZ=
EST0
Following are other possible values for the TZ environment variable:
Hours From Greenwich Mean Time (GMT) Value Description
0 GMT Greenwich Mean Time
+1 ECT European Central Time
+2 EET European Eastern Time
+2 ART
+3 EAT Saudi Arabia
+3.5 MET Iran
+4 NET
+5 PLT West Asia
+5.5 IST India
+6 BST Central Asia
+7 VST Bangkok
+8 CTT China
+9 JST Japan
+9.5 ACT Central Australia

UC-8100-LX Software Getting Started
2-11
Hours From Greenwich Mean Time (GMT) Value Description
+10 AET Eastern Australia
+11 SST Central Pacific
+12 NST New Zealand
-11 MIT Samoa
-10 HST Hawaii
-9 AST Alaska
-8 PST Pacific Standard Time
-7 PNT Arizona
-7 MST Mountain Standard Time
-6 CST Central Standard Time
-5 EST Eastern Standard Time
-5 IET Indiana East
-4 PRT Atlantic Standard Time
-3.5 CNT Newfoundland
-3 AGT Eastern South America
-3 BET Eastern South America
-1 CAT Azores
/etc/localtime
The local timezone is stored in /etc/localtime and is used by GNU Library for C (glibc) if the TZ environment
variable is not set. This file is either a copy of /usr/share/zoneinfo/ file or a symbolic link to it. The UC-8100-LX
does not provide /usr/share/zoneinfo/ files, so you have to copy a time zone information file to the UC-8100-LX
and write over the original local time file.
21BDetermining Available Drive Space
To know the available drive space remaining, use df command with the –h tag. The system will return the
amount of drive space broken down by file system. Check the following example.
moxa@Moxa:~$ df -h
Filesystem Size Used Avail Use% Mounted on
rootfs 803M 238M 524M 32% /
/dev/root 803M 238M 524M 32% /
tmpfs 25M 188K 25M 1% /run
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 10M 0 10M 0% /dev
tmpfs 50M 0 50M 0% /run/shm
22BEnabling and Disabling Daemons
Only the following daemons are enabled in UC-8100-LX by default
sftpd SFTP Server / Client daemon
sshd Secure Shell Server daemon
You may manage what services to run in the background by the command insserv. Below example shows how
to add the apache daemon in current runlevel.
moxa@Moxa:~$ sudo insserv –d apache2
Apache will not activate in current boot session but will be running in the background from next boot session.
To disable the apache daemon, use the following command.
moxa@Moxa:~$ sudo insserv -r apache2

UC-8100-LX Software Getting Started
2-12
You can also write your own daemon and start it in the system init stage.
### BEGIN INIT INFO
# Provides: scriptname
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Start daemon at boot time
# Description: Enable service provided by daemon.
### END INIT INFO
YOUR SCRIPT
Linux daemons can be started or stopped in current boot session by using of the scripts in /etc/init.d. To start
the apache daemon, use:
moxa@Moxa:~$ sudo /etc/init.d/apache2 start
To stop the apache daemon, use:
moxa@Moxa:~$ sudo /etc/init.d/apache2 stop
In comparison to insserv, scripts in /etc/init.d/ will only start or stop the services in the current boot session.
Once you reboot the UC-8100-LX, it will go back to the default settings which managed by insserv.
23BPackage Management
Most of the software packages will be maintained by Debian community through Debian official apt repository
while the UC-8100-LX-only features will be maintained by Moxa. By adding Moxa repository to
/etc/apt/sources.list will allow you to keep your system up to date with the newest UC-8100-LX packages.
moxa@Moxa:~$ cat /etc/apt/sources.list
deb http://debian.moxa.com/debian wheezy main
deb http://ftp.us.debian.org/debian/ wheezy main contrib non-free
deb-src http://ftp.us.debian.org/debian/ wheezy main contrib non-free
deb http://ftp.us.debian.org/debian/ wheezy-updates main contrib non-free
deb-src http://ftp.us.debian.org/debian/ wheezy-updates main contrib non-free
deb http://security.debian.org/ wheezy/updates main contrib non-free
deb-src http://security.debian.org/ wheezy/updates main contrib non-free
deb http://ftp.debian.org/debian wheezy-backports main contrib non-free
deb-src http://ftp.debian.org/debian wheezy-backports main contrib non-free
Following packages will be maintained through Moxa official repository.
Package Name Version Architecture Description
libssl1.0.0:armhf 1.0.1e-2+deb7u1
3+uc8100 armhf SSL shared libraries
openssl 1.0.1e-2+deb7u1
3+uc8100 armhf Secure Socket Layer (SSL) binary and related cryptographic tools
uc8100-cellular-utils 1.2.0 armhf Cellular driver and related utility on
uc8100 series.
uc8100-diag 1.0.0 armhf Self-diagnostic utility on uc8100 series.
uc8100-push-btn 1.0.0 armhf Push button utility on uc8100 series.
uc8100-setdef 1.0.0 all Set-to-default utility on uc8100 series.

UC-8100-LX Software Getting Started
2-13
Package Name Version Architecture Description
uc8100-setinterface 1.0.0 all Adjust UART mode utility on uc8100
series.
uc8100-snmpd 5.4.3~dfsg-2.7 armhf SNMP (Simple Network Management
Protocol) agents
uc8100-system 1.3.0-2 armhf System files in uc8100
uc8100-wifi-utils 1.2.0 armhf WiFi utils on uc8100 series.
24BReboot/Shutdown the UC-8100-LX
To shut down a running Debian GNU/Linux system, you must not reboot with the reset switch on the front or
back of your computer, or just turn off the computer. Debian GNU/Linux should be shut down in a controlled
manner, otherwise files might get lost and/or disk damage might occur. If you run a desktop environment,
there is usually an option to “log out” available from the application menu that allows you to shutdown (or
reboot) the system.
To reboot the UC-8100-LX, use the following command.
moxa@Moxa:~$ sudo reboot –i –f –d
To shut down the UC-8100-LX, use the following command.
moxa@Moxa:~$ sudo shutdown -h "now"

3
3. 9BAdvanced Configurations on Peripherals
This chapter includes more information on the periperials on UC-8100-LX, such as the serial interface, the
storage, the diagnostic LEDs, and the cellualar module.
The following topics are covered in this chapter:

Serial Ports

69B
Disable the USB Port

26BUSB Port

69B
Disable the USB Port

70B
USB Automount

27BSD and MicroSD Slot

71B
Enabling Write Protection
Error! Reference source not found.

Error! Reference source not found.

Error! Reference source not found.

77B
Cellular Signal Strength
Error! Reference source not found.

78B
Cellular Dial-Up mode

79B
Cellular GPS Port