Last modified by Yunhao Wu on 2023/07/05 16:11
From version 2.1
edited by Yunhao Wu
on 2023/07/05 16:11
Change comment: Renamed from xwiki:Informatik.Helpdesk.ProgrammeBeimLogoutNichtBeenden.WebHome
To version 1.1
edited by wikibot
on 2023/02/05 20:31
Change comment: Imported from foswiki

Summary

Details

Page properties
Author
... ... @@ -1,1 +1,1 @@
1 -XWiki.wyun
1 +XWiki.wikibot
Content
... ... @@ -12,8 +12,9 @@
12 12  
13 13  If a student wants to run a computer intensive program at night, this is in principle not a problem, as far as the following points are taken into consideration:
14 14  
15 - in order to connect to lxhalle via SSH you have to enter in the terminal the passphrase, that is standing below your cit.tum-Login (CIT/ITO-Login). [[Here>>https://xwiki.rbg.tum.de/bin/view/Informatik/Helpdesk/Ssh_mit_PuTTY]] is !HowTo for Windows users, who should set up !PuTTY, which enables the ssh connection via terminal. {{{ssh ITO-Kennung@lxhalle.in.tum.de}}}
16 -
15 + in order to connect to lxhalle via SSH you have to enter in the terminal the passphrase, that is standing below your in.tum-Login (Informatik/RBG-Login). [[Here>>https://xwiki.rbg.tum.de/bin/view/Informatik/Helpdesk/Ssh_mit_PuTTY]] is !HowTo for Windows users, who should set up !PuTTY, which enables the ssh connection via terminal. {{{
16 +ssh RBG-Kennung@lxhalle.in.tum.de
17 +}}}
17 17  * in order the programs to work without harming other computer users, they should be started with one of the lowest possible scheduling priorities. This happens with the command \“nice -n19\” as shown in the HowTo example.
18 18  
19 19  {{html wiki="true"}}
... ... @@ -28,22 +28,20 @@
28 28  %CODE{ lang=\"bash\" }% #!/bin/bash while true do sleep 1 date done >> datum.txt
29 29  
30 30  %ENDCODE%
31 -
32 32  ----
33 33  
34 -{{id name="NohupAnchor"/}}
35 -
34 +{{id name="NohupAnchor" /}}
36 36  == 3. nohup ==
37 37  
38 38  In case a program is started with the nohup command, the HUP-signal, that is send by the logout is ignored. So the program proceeds further even after the user has already logged out
39 -
40 -* the following input {{{nice -n 19 nohup ./test.sh & }}}starts the test script and the control operator (##&##) makes the command run in the background.
38 +* the following input {{{
39 +nice -n 19 nohup ./test.sh &
40 +}}} starts the test script and the control operator (##&##) makes the command run in the background.
41 41  * from now on the date is written in the file ##datum.txt##, even after the user logs out
42 42  * after running ##nohup## the PID of the process is shown. PID can be used to close a program (if it doesn’t terminate automatically), to do so you should enter the following command ##kill PID##.
43 43  * now you can continue your work in the terminal or you can close it without terminating the program
44 44  * by logging out and then once again in, you can check, whether in the file ##datum.txt## it’s still written
45 -[[image:https://xwiki.rbg.tum.de/bin/download/Informatik/Helpdesk/ProgrammeBeimLogoutNichtBeenden/WebHome/nohupTest.png]]
46 -
45 +[[image:https://xwiki.rbg.tum.de/bin/download/Informatik/Helpdesk/ProgrammeBeimLogoutNichtBeenden/WebHome/nohupTest.png|| alt=""]]
47 47  ----
48 48  
49 49  == 4. screen ==
... ... @@ -52,35 +52,46 @@
52 52  
53 53  
54 54   First here are some basic control commands:
55 -
56 -* start screen:
57 -** {{{nice -n 19 screen}}}
58 -** command for starting a session with customized name (in our case named sitzung1) {{{nice -n 19 screen -S sitzung1}}}
54 +* start screen:
55 +** {{{
56 + nice -n 19 screen
57 +}}}
58 +** command for starting a session with customized name (in our case named sitzung1) {{{
59 + nice -n 19 screen -S sitzung1
60 +}}}
59 59  * at the beginning some information for the program is shown and then you can click the space bar, the console will still remain unchanged – you have started the screen session and you are now in the first virtual console
60 60  * start one more virtual console:
61 61  ** ##Strg## + ##A## and then ##C##
62 -* close a virtual console:
64 +* close a virtual console:
63 63  ** ##Strg## + ##A## and then ##K##
64 -* switch between the virtual consoles:
66 +* switch between the virtual consoles:
65 65  ** ##Strg## + ##A## and then ##Leertaste##
66 66  ** ##Strg## + ##A## and then number between 0 and 9 (for the corresponding console)
67 -* detach the current session:
69 +* detach the current session:
68 68  ** ##Strg## + ##A## and then ##D##
69 -** for a certain session (in this case sitzung1) {{{screen -d sitzung1}}}
70 -* reestablish connection to a session (here sitzung1)
71 +** for a certain session (in this case sitzung1) {{{
72 + screen -d sitzung1
73 +}}}
74 +* reestablish connection to a session (here sitzung1)
71 71  ** screen -r sitzung1
72 -* end session
76 +* end session
73 73  ** ##Strg## + ##D##
74 -** {{{exit}}}
78 +** {{{
79 + exit
80 +}}}
75 75  ** close the last virtual console
76 -* list all running session with their names (example in picture be 6561) {{{screen -ls }}}
77 -[[image:https://xwiki.rbg.tum.de/bin/download/Informatik/Helpdesk/ProgrammeBeimLogoutNichtBeenden/WebHome/screen.jpg]]
82 +* list all running session with their names (example in picture be 6561) {{{
83 + screen -ls
84 +}}}
85 +[[image:https://xwiki.rbg.tum.de/bin/download/Informatik/Helpdesk/ProgrammeBeimLogoutNichtBeenden/WebHome/screen.jpg|| alt=""]]
78 78  * show all keyboard shortcuts
79 79  ** enter ##Strg## + ##A## and then ##?##
80 -* refer to the man pages for the full documentation of the screen command {{{man screen}}}
88 +* refer to the man pages for the full documentation of the screen command {{{
89 + man screen
90 +}}}
81 81  
82 - Steps for using the screen (see the commands above):
83 83  
93 + Steps for using the screen (see the commands above):
84 84  * start programs
85 85  ** open terminal window
86 86  ** start screen – thereby automatically creating a session, that is attached
... ... @@ -88,7 +88,7 @@
88 88  ** start new consoles and programs if needed
89 89  ** detach the current sessions
90 90  ** close terminal window
91 -* end programs
101 +* end programs
92 92  ** open terminal window
93 93  ** list all running screen sessions
94 94  ** resume desired screen sessions
... ... @@ -99,3 +99,5 @@
99 99  {{html wiki="true"}}
100 100  <hr />
101 101  {{/html}}
112 +
113 +