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Wiki source code of Linux User Consoles How-Tos

Version 21.1 by loktevda on 2025-11-03 09:17
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1 {{toc/}}
2
3
4 **Current Operating System: Ubuntu 24.04 LTS **
5
6 This guide provides essential how-to instructions for Ubuntu 24.04 LTS users working with the Linux console FSFL.
7
8 == Access Information ==
9
10 **Need login credentials functional accounts or support?**
11
12 * **Email:** [[darya.loktev@desy.de>>mailto:darya.loktev@desy.de]]
13 * **In-person support:** Come to room 02.015
14
15 == Shared Desktop Environment ==
16
17 **The Desktop will be shared** - please use Desktop shared folders for file storage and collaboration.
18
19
20 In case the Gnome graphic user interface is frozen, restart the X server by pressing the following 4 keys simultaneously: Ctr, Alt, SysReq, K. or Wndows taskbar
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22
23
24 == Application Access Changes ==
25
26 **Application access has changed:** Applications are no longer accessed via Desktop icons. Instead, applications are now accessed through **Dashboard pins**.
27 Look for the Dashboard left (Activities overview) to find and launch your applications.
28 [[image:Screenshot from 2025-05-06 13-10-38.png||height="368" width="600"]]
29
30 == Paths of the mounts ==
31
32 Since the path's are not in the fstab anymore, one have to know the paths which are:
33
34 FLASH Core-FS:
35
36 **/asap3/flash/gpfs**
37
38 FLASH-O Core-FS:
39
40 **/asap3/fs-flash-o/gpfs**
41
42 pnfs:
43
44 **/pnfs/desy.de/flash1**
45
46
47 == How to take screenshots ==
48
49 Ubuntu 24 provides several convenient keyboard shortcuts for capturing screenshots:
50
51 === Keyboard Shortcuts ===
52
53 {{{
54 }}}
55
56 |=Shortcut|=Action
57 | FN +PrtScn|Capture entire desktop
58 |Alt + PrtScn|Capture active window only
59 |Shift + PrtScn|Capture selected area
60 |Ctrl + PrtScn|Copy screenshot to clipboard
61
62 === How to Use Area Selection ===
63
64 1. Press Shift + PrtScn
65 1. Your cursor changes to a crosshair
66 1. Click and drag to select the area you want to capture
67 1. Release to take the screenshot
68
69 [[image:attach:Screenshot from 2020-01-22 10-16-28.png||height="250"]]
70
71 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.
72
73 In the above picture i used alt+print, for the following i used shift+print, so you see its just an area:
74
75 [[image:attach:Screenshot from 2020-01-22 10-16-02.png||height="250"]]
76
77
78 == How to change colors in terminal ==
79
80 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:
81
82 [[image:attach:Screenshot from 2020-01-22 10-18-49.png||height="250"]]
83
84 In the tab "Colors" you can change the colors from system themed to your own favorite:
85
86 [[image:attach:Screenshot from 2020-01-22 10-19-13.png||height="250"]]
87
88 In my case on my computer i use green text and black background with a much more colored stuff [[image:http://confluence.desy.de/s/en_US/7901/4635873c8e185dc5df37b4e2487dfbef570b5e2c/_/images/icons/emoticons/smile.svg||border="0" title="(smile)" class="emoticon emoticon-smile"]]
89
90 [[image:attach:Screenshot from 2020-01-24 09-06-40.png||height="112"]]
91
92 (One can edit some coloring-the-terminal stuff in the .bashrc, too! But this isn't the topic in here [[image:http://confluence.desy.de/s/en_US/7901/4635873c8e185dc5df37b4e2487dfbef570b5e2c/_/images/icons/emoticons/smile.svg||border="0" title="(smile)" class="emoticon emoticon-smile"]])
93
94
95 == How to run the Shell as a login shell ==
96
97 In the editing Profile Windows (see picture above) click on the Tab "Command" and check the "Run command as a login shell":
98
99 [[image:attach:Screenshot from 2020-01-22 10-19-44.png||height="250"]]
100
101 To see if you are running with or without login you can use the command "echo $0":
102
103 [[image:attach:Screenshot from 2020-01-22 10-20-29.png]]
104
105 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.
106
107
108 == Additional Tips ==
109
110 ==== Terminal Best Practices ====
111
112 * Use Ctrl + C to cancel running commands
113 * Use Ctrl + Z to suspend processes (resume with fg)
114 * Use history to view command history
115 * Use Tab for auto-completion
116
117 ==== File System Navigation ====
118
119 * Use pwd to show current directory
120 * Use ls -la for detailed file listings
121 * Use cd - to return to previous directory
122
123 ==== Getting Help ====
124
125 * Use man <command> for manual pages
126 * Use <command> ~-~-help for quick help
127 * Use apropos <keyword> to find related commands
128
129