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Full Discussion: Add leading zeroes to numbers in a file
Top Forums Shell Programming and Scripting Add leading zeroes to numbers in a file Post 302206256 by raidzero on Tuesday 17th of June 2008 10:31:07 AM
Old 06-17-2008
Add leading zeroes to numbers in a file
Hello, I am (trying) to write a script that will check to see how many users are logged on to my machine, and if that number is more than 60 I need to kill off all the oldest sessions that are over 60. So far I have been able to check how many users are on and now I am at the part where I have to actually kill them off. I have chosen to write the idle times for all the logged on users into a file, but I need to add leading zeroes to them in order to properly sort them. How do I do this? the file is /tmp/uidle. This is my code so far:

Code:
numusers=$(who -q | grep Total | tr -s " " | cut -d" " -f3)                
echo Total number of users: ${numusers}                                    
if test $numusers -gt 60; then                                             
diff=$(expr $numusers - 60)                                                
echo "There are $diff too many users, killing the $diff oldest users..."   
who -u | sort -k4.2,6 | grep bhb | tr -s " " | cut -d" " -f5 >> /tmp/uidle 
else                                                                       
echo "There are less than 60 users. Exiting"                               
fi                                                                         
exit 1

Thanks
 

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LEARN ABOUT DEBIAN

rt-clean-sessions-4

rt-clean-sessions(8)					     Request Tracker Reference					      rt-clean-sessions(8)

NAME

       rt-clean-sessions - clean old and duplicate RT sessions

SYNOPSIS

	    rt-clean-sessions [--debug] [--older <NUM>[H|D|M|Y]]

	    rt-clean-sessions
	    rt-clean-sessions --debug
	    rt-clean-sessions --older 10D
	    rt-clean-sessions --debug --older 1M
	    rt-clean-sessions --older 10D --skip-user

DESCRIPTION

       Script cleans RT sessions from DB or dir with sessions data.  Leaves in DB only one session per RT user and sessions that aren't older than
       specified(see options).

       Script is safe because data in the sessions is temporary and can be deleted.

OPTIONS

       older
	   Date interval in the "<NUM>[<unit>]" format. Default unit is D(ays), H(our), M(onth) and Y(ear) are also supported.

	   For example: "rt-clean-sessions --older 1M" would delete all sessions that are older than 1 month.

       skip-user
	   By default only one session per user left in the DB, so users that have sessions on multiple computers or in different browsers will be
	   logged out.	Use this option to avoid this.

       debug
	   Turn on debug output.

NOTES

       Functionality similar to this is implemented in html/Elements/SetupSessionCookie ; however, that does not guarantee that a session will be
       removed from disk and database soon after the timeout expires.  This script, if run from a cron job, will ensure that the timed out
       sessions are actually removed from disk; the Mason component just ensures that the old sessions are not reusable before the cron job gets
       to them.

perl v5.14.2							    2013-05-22						      rt-clean-sessions(8)
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