Difference between revisions of "HowTo Keep Processes Running After Logging Out Using: "setsid""

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(HowTo Set Session ID (SID) and Process Group ID (PGID))
(HowTo Set Session ID (SID) and Process Group ID (PGID))
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== HowTo Set Session ID (SID) and Process Group ID (PGID) ==
 
== HowTo Set Session ID (SID) and Process Group ID (PGID) ==
 
The "'''setsid'''" command allows one to set a new "'''Session ID'''" ('''SID''') and "'''Process Group ID'''" ('''PGID''') for a given command. This can be useful when logging out from a '''shell''' environment and keeping a process running. Since the process is <u>running</u> in an entirely different "'''session'''", it should <u>not</u> be effected by logging out and terminating the '''shell'''.
 
The "'''setsid'''" command allows one to set a new "'''Session ID'''" ('''SID''') and "'''Process Group ID'''" ('''PGID''') for a given command. This can be useful when logging out from a '''shell''' environment and keeping a process running. Since the process is <u>running</u> in an entirely different "'''session'''", it should <u>not</u> be effected by logging out and terminating the '''shell'''.
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<div class="screen">
 
<div class="screen">
   <div class="screenTitle">''Command:'' "setsig"&nbsp;&nbsp;Example: Keep The "Find" Command Running After Logging Out.</div>
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   <div class="screenTitle">''Command:'' "setsig"&nbsp;&nbsp;&nbsp;&nbsp;Example: Keep The "Find" Command Running After Logging Out.</div>
   <div class="userInput"><span class="prompt">[root@probe tmp]# </span><nowiki>setsid find / -name "rmsession.log" >| /tmp/findresults &</nowiki></div>
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   <div class="userInput"><span class="prompt">[root@probe tmp]# </span><nowiki>setsid find / -name "rmsession.log" >| "/tmp/findresults" &</nowiki></div>
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  <div class="userInput"><span class="prompt">[root@probe tmp]# </span><nowiki>exit</nowiki></div>
 
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</div>
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One can also use the "'''nohup'''", "'''disown'''" and "'''screen'''" commands to provide similar results.

Revision as of 08:51, 30 November 2007

HowTo Set Session ID (SID) and Process Group ID (PGID)

The "setsid" command allows one to set a new "Session ID" (SID) and "Process Group ID" (PGID) for a given command. This can be useful when logging out from a shell environment and keeping a process running. Since the process is running in an entirely different "session", it should not be effected by logging out and terminating the shell.


Command: "setsig"    Example: Keep The "Find" Command Running After Logging Out.
[root@probe tmp]# setsid find / -name "rmsession.log" >| "/tmp/findresults" &
[root@probe tmp]# exit

One can also use the "nohup", "disown" and "screen" commands to provide similar results.