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emWEB-10WT (Hardware and Software Manual) • Operating System and Drivers
5
Operating System and Drivers
When you order the emWEB-10WT with pre-installed software (Debian 8 operating system), then our
default Janz Tec image is pre-installed on the µSD-card and the emWEB-10WT driver package is
already installed and fully configured.
5.1
Janz Tec AG Linux Image for emWEB-10WT
Our pre-installed Janz Tec AG Image contains the combination of the official Debain operating system
as well as our emWEB-10WT drivers. File /root/imageversion.txt contains the image name and version
of the installed Janz Tec image.
You can change the emWEB-10WT configuration on accessing the local hosted website at
http://127.0.0.1/
The local running web service is named "webmin" (http://www.webmin.com) and gives through a web
interface access to different configuration features on the emWEB-10WT. Please refer to chapter 5.2.2
Webmin Configuration Webserver Webmin Configuration Webserver
information.
An additional Janz Tec image feature is a write protected root filesystem. The AUFS filesystem is
integrated to the custom kernel and enabled in the Debian 8 distribution. For further usage
instructions, please have a look at chapter 5.1.3 Overlay filesystem (AUFS).
5.1.1
Default configurations
The emWEB-10WT is delivered with an enabled ssh service. During the first start, the SSH keys will
be created. Following the log in credentials are listed, but please note, that the access for the "root"
user is denied for SSH connections.
Default log in credentials:
Username: dev
Password: dev1
Username: root
Password: root1
5.1.2
Disk Partitioning information
Depending on the installed µSD card, the drive has 3 partitions:
-
/dev/mmcblk0p1: Boot Partition (not mounted)
-
/dev/mmcblk0p2: Linux System Partition (write-protected)
-
/dev/mmcblk0p3: Data Partition (read-write)
mounted to /data/ → use this partition for user data
o
5.1.3
Overlay filesystem (AUFS)
Note: The overlay filesystem is default enabled on your system. This prevents data loss on the local
system partition.
In the case of the enabled filesystem protection, all data written to the "Linux System Partition"
(/dev/mmcblk0p2) will be lost during the next restart of the system. The /data folder can be used to
save user specific data. Use the following commands to configure the behaviour of the overlay
filesystem:
Rev. 1.1
5 - 15
for further configuration
© Janz Tec AG
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