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Very useful .cshrc file for a UNIX or Linux machine.

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This is a very useful .cshrc file for any Linux or UNIX machine. This gives a very nice prompt and a few very useful aliases.

/etc/csh.login
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# /etc/csh.login: This file contains login defaults used by csh and tcsh.
# $Thanks 2> http://www.grymoire.com/Unix/Csh.html
# Set up some environment variables:
source ~/.complete
if ($?prompt) then
        umask 022
        set cdpath = ( /var/spool )
        set notify
        set history = 1000
        set savehist = 500
        setenv MINICOM "-c on"
        setenv HOSTNAME "`uname -n`"
        setenv LESS "-M"
        setenv LESSOPEN "|lesspipe.sh %s"
        setenv DOOMWADDIR "/usr/share/games/doom"
        set path = ( $path /usr/X11R6/bin /usr/games $HOME/bin /usr/local/games )
endif
 
# If the user doesn't have a .inputrc, use the one in /etc.
if (! -r "$HOME/.inputrc") then
        setenv INPUTRC /etc/inputrc
endif
 
# I had problems with the backspace key installed by 'tset', but you might want
# to try it anyway, instead to the 'setenv term.....' below it.
# eval `tset -sQ "$term"`
 setenv term linux
# if ! $?TERM setenv TERM linux
# Set to "linux" for unknown term type:
if ("$TERM" == "") setenv TERM linux
if ("$TERM" == "unknown") setenv TERM linux
 
# Set default POSIX locale:
setenv LC_ALL POSIX
setenv traditional_complete
alias cls 'clear'
alias ls 'ls -hula --color=auto'
alias tarunpack 'tar -xvf'
alias bz2unpack 'tar -jxvf'
 
# Set the default shell prompt:
 
set prompt = "\[%n@$HOSTNAME\]:%~%# "
 
# Set up the LS_COLORS environment variable for color ls output:
eval `dircolors -c`
 
# Notify user of incoming mail.  This can be overridden in the user's
# local startup file (~/.login)
#biff y
 
# Append any additional csh scripts found in /etc/profile.d/:
[ -d /etc/profile.d ]
if ($status == 0) then
        set nonomatch
        foreach file ( /etc/profile.d/*.csh )
                [ -x $file ]
                if ($status == 0) then
                        source $file
                endif
        end
        unset file nonomatch
endif

Get detailed information about your terminal this way.

[jason@Yog-Sothoth]:~% telltc

Use the set noclobber option in the shell, this will prevent accidental overwriting of files.

[jason@Yog-Sothoth]:~% echo "foo" > vimeo.sh
vimeo.sh: File exists.

But the files can still be deleted with rm -f.

And this method can still force a write to the file.

echo "hi" >! testing.txt

I cannot write to a file this way.

[jason@Yog-Sothoth]:~% echo "hi" > me
me: File exists.

But if I use an exclamation mark after the redirection operator, it forces the write.

[jason@Yog-Sothoth]:~% echo "hi" >! me
[jason@Yog-Sothoth]:~% cat me
hi

So that is how it can be overridden.

There is much more information about the UNIX C shell here: https://www.mkssoftware.com/docs/man1/csh.1.asp.


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