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Full Discussion: Help Needed "Urgent"
Top Forums Shell Programming and Scripting Help Needed "Urgent" Post 80543 by Perderabo on Tuesday 9th of August 2005 11:49:08 AM
Old 08-09-2005
warangalboy, please read our rules. And in particular:
(4) Do not 'bump up' questions if they are not answered promptly. No duplicate or cross-posting and do not report a post where your goal is to get an answer more quickly.

Both your duplicate thread and your "Can any plz help" post are against that rule. If this is just a problem from some book and not a classwork assignment, can you help me understand the urgency? What would be your idea of a low priority problem?

vino, the "kill -0 $pid" idea is great. That's a much better way to check if the process is still running. But if those kill commands don't work, the skill commands won't help either. Anyway skill won't be on most unix boxes. I have only seen it on Linux.

Complex signals like this do not mix well with many shell scripts. The problem is that shell scripts are a collection of processes, not the single process that you are signalling.
 

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LEARN ABOUT CENTOS

chsh

CHSH(1) 							   User Commands							   CHSH(1)

NAME

       chsh - change your login shell

SYNOPSIS

       chsh [-s shell] [-l] [-u] [-v] [username]

DESCRIPTION

       chsh is used to change your login shell.  If a shell is not given on the command line, chsh prompts for one.

       chsh is used to change local entries only. Use ypchsh, lchsh or any other implementation for non-local entries.

OPTIONS

       -s, --shell shell
	      Specify your login shell.

       -l, --list-shells
	      Print the list of shells listed in /etc/shells and exit.

       -u, --help
	      Print a usage message and exit.

       -v, --version
	      Print version information and exit.

VALID SHELLS

       chsh  will  accept  the full pathname of any executable file on the system.  However, it will issue a warning if the shell is not listed in
       the /etc/shells file.  On the other hand, it can also be configured such that it will only accept shells listed in this	file,  unless  you
       are root.

EXIT STATUS

       Returns 0 if operation was successful, 1 if operation failed or command syntax was not valid.

SEE ALSO

       login(1), passwd(5), shells(5)

AUTHOR

       Salvatore Valente <svalente@mit.edu>

AVAILABILITY

       The chsh command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

util-linux							     July 2009								   CHSH(1)
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