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Full Discussion: perl as lanuage of shells in unix
Top Forums Shell Programming and Scripting perl as lanuage of shells in unix Post 30415 by auswipe on Tuesday 22nd of October 2002 12:31:24 AM
Old 10-22-2002
Re: perl as lanuage of shells in unix
Quote:
Originally posted by yls177
hi, do shells in unix understand the language of perl?
No. Perl understands Perl.

You will see in many perl scripts that the first line of code is often something along the lines of :

Code:
#!/usr/bin/perl

This tells the shell script to use the perl parser for the perl script.

Quote:
Originally posted by yls177

learning perl will make u a ultimate shell programmer?
thanks
No. While Perl does contain a lot of similiarities to shell scripting, it is in it's own little world. If you want to be an ultimate shell scripter, then you should pick a popular shells such as Korn Shell (ksh) (heartily endorsed by Perderabo) or Bourne Again Shell (bash) and have at it. There are many reference guides on the net to shell scripting.
 

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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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