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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 OSF1

rusers

rusers(1)						      General Commands Manual							 rusers(1)

NAME

       rusers - Display a list of users who are logged in to a remote machine

SYNOPSIS

       rusers [-ahilu] host...

OPTIONS

       Give  a	report for a machine even if no users are logged in.  Sort alphabetically by host name.  Sort by idle time.  Give a longer listing
       in the style of who(1).	Sort by number of users.

DESCRIPTION

       The rusers command displays information about users and processes running on remote machines.   The  listing  is  in  the  order  in  which
       responses are received, but this order can be changed by specifying one of the options listed in the OPTIONS section.

       By default the rusers command prints the names of the users logged in.	When the -l option is given, additional information is printed for
       each user, as follows:

       userid hostname:terminal login date login time idle time login host

       If hostname and login host are the  same  value, the login host field is not displayed.	Likewise, if hostname is not idle, the	idle  time
       is not displayed. A remote host only responds if it is running the rusersd daemon, which may be started from the inetd daemon or the listen
       function.

SEE ALSO

       Commands: who(1), inetd(8)

       Functions: listen(2)

																	 rusers(1)
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