Users Guide

Updating operating system and applications
After enabling the network connections and connecting to the internet, Dell recommends to have the latest OS components and
applications installed. To update Ubuntu Core 16, run:
admin@localhost:~$ sudo snap refresh
Viewing operating system and application versions
Run the uname command to view system information:
root@DCPLB02:/sys/class/net# uname -a
Add the -a option at the end of the command to print all system information. For example:
Linux DCPLB02 4.4.0-98-generic #121-Ubuntu SMP Tue Oct 10 14:24:03 UTC 2017 x86_64
x86_64 x86_64 GNU/Linux
NOTE: Check if a newer version of the software is available. For more information on checking for updates, see Updating
operating system and applications.
Additional Ubuntu commands
Basic commands
NOTE: For more information about Ubuntu commands, see https://snapcraft.io/.
Table 9. Basic commands
Action Ubuntu Core 16
Viewing system attributes
#sudo snap version
Updating the image to the latest release
#sudo snap update
Viewing a list of all the snaps that are currently installed
#sudo snap find
Viewing a set and attribute to a snap
#sudo snap set <snap> <attribute>=<value>
Querying attributes from a snap
#sudo snap get <snap>
Rebooting the system Run the command:
admin@localhost:$ sudo reboot
returns:
System reboot successfully
Shutting down the system Run the command:
admin@localhost:$ sudo poweroff
The system shuts down successfully.
Add a new user if libnss-extrausers is pre-installed
$sudo adduser --extrausers testuser
Change a user’s password
$sudo passwd <user-name>
Re-mount the Ubuntu Snappy 16 root-file system as read only
Snappy 16 rootfs is Read-Only
Accessing the built-in help
admin@localhost:~$ sudo snap --help
50 Setting up the operating system