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Full Discussion: combine 2 lines (command & echo)
Top Forums UNIX for Dummies Questions & Answers combine 2 lines (command & echo) Post 8053 by LivinFree on Friday 5th of October 2001 12:55:14 AM
Old 10-05-2001
Hmm, the above seems to work for me...

Here's how I personally would do it (I'm not trying to do it all for you, I just think that there's so many ways to do it - this may give you a few new ideas to tackle your own script):
Code:
#!/bin/sh
use_msg () {
echo "Usage:  `basename $0` [name]"
}

if [ "$#" -ne "1" ] ; then
        use_msg
        exit 2
fi
name_t=`grep ^${1} /etc/passwd | cut -d: -f5 | cut -d, -f1`
if [ "$name_t" = "" ] ; then
        name="$1"
else
        name="$name_t"
fi
who | grep $1 >/dev/null 2>&1
if [ "$?" = "0" ] ; then
        logg=""
else
        logg="not "
fi
echo "${name} is ${logg}logged in"

Did you catch what happened with the "logg" variable? It's important to have a space after "not", to seperate the words. Also, this script does not check to see if that username even exists... it will simply say that the user is not logged in, since there is no GECOS data...
One more thing: I added another cut statement, because my GECOS info is comma delimited - the way the script was before, I was seeing the entire field, not just that name.

Hope this gives you a few ideas...
 

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LEARN ABOUT CENTOS

bos_exec

BOS_EXEC(8)						       AFS Command Reference						       BOS_EXEC(8)

NAME

       bos_exec - Executes a command on a remote server machine

SYNOPSIS

       bos exec -server <machine name> -cmd <command to execute>
	   [-cell <cell name>] [-noauth] [-localauth] [-help]

       bos e -s <machine name> -cm <command to execute>
	   [-ce <cell name>] [-n] [-l] [-h]

DESCRIPTION

       The bos exec command executes the indicated command on the file server machine named by the -server argument. Its intended use is to reboot
       the machine, using the /sbin/reboot command or equivalent.

OPTIONS

       -server <machine name>
	   Indicates the server machine on which to execute the command.  Identify the machine by IP address or its host name (either fully-
	   qualified or abbreviated unambiguously). For details, see bos(8).

       -cmd <command to execute>
	   Specifies the complete local disk pathname of the command to execute (for example, /sbin/reboot). Surround this argument with double
	   quotes ("") if the command contains one or more spaces.

       -cell <cell name>
	   Names the cell in which to run the command. Do not combine this argument with the -localauth flag. For more details, see bos(8).

       -noauth
	   Assigns the unprivileged identity "anonymous" to the issuer. Do not combine this flag with the -localauth flag. For more details, see
	   bos(8).

       -localauth
	   Constructs a server ticket using a key from the local /etc/openafs/server/KeyFile file. The bos command interpreter presents the ticket
	   to the BOS Server during mutual authentication. Do not combine this flag with the -cell or -noauth options. For more details, see
	   bos(8).

       -help
	   Prints the online help for this command. All other valid options are ignored.

EXAMPLES

       The following command reboots the machine "fs2.abc.com". The issuer has previously issued the bos shutdown command to shutdown all
       processes cleanly.

	  % bos exec -server fs2.abc.com -cmd /sbin/shutdown -r now

PRIVILEGE REQUIRED

       The issuer must be listed in the /etc/openafs/server/UserList file on the machine named by the -server argument, or must be logged onto a
       server machine as the local superuser "root" if the -localauth flag is included.

       The bos exec command is not available on servers running in restricted mode.

SEE ALSO

       bos(8)

COPYRIGHT

       IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.

       This documentation is covered by the IBM Public License Version 1.0.  It was converted from HTML to POD by software written by Chas
       Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.

OpenAFS 							    2012-03-26							       BOS_EXEC(8)
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