Linux User Consoles How-Tos

• • Access Information
  • Shared Desktop Environment
  • Application Access Changes
  • Paths of the mounts
  • How to take screenshots
    • Keyboard Shortcuts
    • How to Use Area Selection
  • How to change colors in terminal
  • How to run the Shell as a login shell
  • Additional Tips
    • • Terminal Best Practices
      • File System Navigation
      • Getting Help

Current Operating System: Ubuntu 24.04 LTS 

This guide provides essential how-to instructions for Ubuntu 24.04 LTS users working with the Linux console FSFL.

Access Information

Need login credentials functional accounts or support?

• Email: darya.loktev@desy.de
• In-person support: Come to room 02.015

Shared Desktop Environment

The Desktop will be shared - please use Desktop shared folders for file storage and collaboration. 

Application Access Changes

Application access has changed: Applications are no longer accessed via Desktop icons. Instead, applications are now accessed through Dashboard pins.
Look for the Dashboard left (Activities overview) to find and launch your applications.

Paths of the mounts

Since the path's are not in the fstab anymore, one have to know the paths which are:

FLASH Core-FS:

/asap3/flash/gpfs

FLASH-O Core-FS:

/asap3/fs-flash-o/gpfs

pnfs:

/pnfs/desy.de/flash1

How to take screenshots

Ubuntu 24 provides several convenient keyboard shortcuts for capturing screenshots:

Keyboard Shortcuts

How to Use Area Selection

1. Press Shift + PrtScn
2. Your cursor changes to a crosshair
3. Click and drag to select the area you want to capture
4. Release to take the screenshot

Easy to take screenshots of the full Desktop, only the active window or just an area. In area mode your cursor turns into a crosshair and you have to mark the area you want to take a screen of.

In the above picture i used alt+print, for the following i used shift+print, so you see its just an area:

How to change colors in terminal

In the Terminal click on "Edit" → "Preferences". A new window opens and there you click on the tab "Profiles". After this click on "Edit" to change the used profile:

In the tab "Colors" you can change the colors from system themed to your own favorite:

In my case on my computer i use green text and black background with a much more colored stuff

(One can edit some coloring-the-terminal stuff in the .bashrc, too! But this isn't the topic in here )

How to run the Shell as a login shell

In the editing Profile Windows (see picture above) click on the Tab "Command" and check the "Run command as a login shell":

To see if you are running with or without login you can use the command "echo $0":

The "-" implicates that it is a login shell. At example you need the login shell to use all your own variables. If you just change user etc. without it, it may happen that - at example - you don't have permissions to geht dconf work because of some variables still got owned by the previous user.

Additional Tips

Terminal Best Practices

• Use Ctrl + C to cancel running commands
• Use Ctrl + Z to suspend processes (resume with fg)
• Use history to view command history
• Use Tab for auto-completion

File System Navigation

• Use pwd to show current directory
• Use ls -la for detailed file listings
• Use cd - to return to previous directory

Getting Help

• Use man <command> for manual pages
• Use <command> --help for quick help
• Use apropos <keyword> to find related commands