how to edit linux system files? Post: 302272051

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Operating Systems Linux Gentoo how to edit linux system files? Post 302272051 by mark54g on Monday 29th of December 2008 01:32:13 PM

12-29-2008

Registered User

As has been explained to you, Linux (the Kernel) and many of the accompanying software is open source.

This means that you are free to edit the files as you wish without fear of reprisals in the form of copyright violations and such for the changes. Other software vendors do not allow you to make these changes to their code as they are proprietary.

Linux does not have "System Files" in so much as what you seem to be describing.

You cannot simply go in and muck about.

You CAN however change parameters of running machines, and do a lot more. What do you wish to change and what are you trying to learn from this?

read up on sysctl and how it can change parameters of the kernel on a running machine. However, be aware that changes you make can disrupt running processes as well as the stability of the machine.

As for editing files in linux, also look up "vi" or "vim" and use that to edit the files themselves, as they are text based editors found on nearly every UNIX or UNIX-Like operating system.

mark54g

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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)