C Shell

The c shell was created to solve some of the problems the Bourne shell has for interactive users. While it is not officially part of Unix, it is available on many/most Unix systems. See Summary of Shell Facilities.

C Shell Files
There are three special c shell files: .cshrc, .login and .logout. The .cshrc file is executed each time a c shell is created. The .login file is executed once, at login. The .logout file is executed once, at logout.
Below is an example of a .cshrc file.

set path=(/usr/bin /bin /usr/local/bin .)
set manpath=(/usr/man /usr/local/man)

A .login file might look something like the following.

tset -I -Q
umask 077

A .logout file might look something like the following.

clear

For more information on the c shell try man csh.

C Shell Commands

C Shell Command Action

alias [name][command] Assign name as the alias for [command]

bg Place the current job in the background

echo [-n] string Write string to standard output

exec command Execute command in place of current shell

exit [(expr)] Exit shell

fg option Place the job listed in option in the foreground as the current job

history Display a list of history events

jobs [options] List all active jobs

kill [options] pid Terminate the disignated process pid

rehash Recompute the hash table for path

repeat n command Execute n instances of command

set [variable [n] [=value]] Set variable to value

setenv name value Set the value of name to be value

source file Read commands from file

stop [option] Stop the current or specified job executing in the background

suspend Stop the shell

unalias name Remove name from the alias list

unsetenv name Remove enviromental variables that match name

C Shell Command	Action
alias [name][command]	Assign name as the alias for [command]
bg	Place the current job in the background
echo [-n] string	Write string to standard output
exec command	Execute command in place of current shell
exit [(expr)]	Exit shell
fg option	Place the job listed in option in the foreground as the current job
history	Display a list of history events
jobs [options]	List all active jobs
kill [options] pid	Terminate the disignated process pid
rehash	Recompute the hash table for path
repeat n command	Execute n instances of command
set [variable [n] [=value]]	Set variable to value
setenv name value	Set the value of name to be value
source file	Read commands from file
stop [option]	Stop the current or specified job executing in the background
suspend	Stop the shell
unalias name	Remove name from the alias list
unsetenv name	Remove enviromental variables that match name