how to use a shell script as a linux command

[kalaisuresh]

Hai ,

I have a shell script in my directory
filename = c
-----
#/bin/bash
clear
-----
root>c
if i run this script in my directory it is working
but i have this one to use like linux command
whereever i am giving c that terminal or console has to be clear
please help me

[sicarie]

Hai ,

I have a shell script in my directory
filename = c
-----
#/bin/bash
clear
-----
root>c
if i run this script in my directory it is working
but i have this one to use like linux command
whereever i am giving c that terminal or console has to be clear
please help me

Try this:

# ./c

That is a way to execute programs when the directory is not in your path (if it is, you should be able to execute by just typing the name).

I think (though please someone correct me if I'm wrong) that you can use
# echo $PATH
to see what your current path is set at, and I can't remember of the top of my head, but if you Google "add to path" and the OS flavor you're using, you'll see pretty quickly how to edit the path.

[prn]

kalaisuresh appears to be using bash as his shell, so:

$ echo $PATH

should work fine to show the path. Let's suppose the result looks like this:

[prn@deimos ~]$ echo $PATH
/usr/lib/qt-3.3/bin:/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin

A sensible thing to do (and commonly done) would be to create a "bin" directory for storing personal programs. If so, I might create a directory as /home/prn/bin and put a program, e.g., like his c into that directory. Now I want to make sure that when I type "c[enter]" at my prompt, that my program c is the one that is executed. (In this example, there probably isn't a system equivalent, but just to be sure, it would be wise to check. Use the command
which c
to see if the system would find another program of the same name on your PATH).

Now you you want to make sure that your system will always find your program c for you. Edit your .bash_profile and, toward the end, include a line like:
PATH=$HOME/bin:$PATH
this puts the directory /home/bin/prn (after all, this is my example and I know what my login is -- I'm less sure about yours :)) at the beginning of my path. Whatever your login name is, it will put YOUR bin directory, i.e., the one hanging off your $HOME at the beginning of your path.

Now, after

. .bash_profile

(to rerun your profile script):

[prn@deimos ~]$ echo $PATH
/home/prn/bin:/usr/lib/qt-3.3/bin:/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin

/home/prn/bin is now the first place my shell will look for programs.

Of course, in the case of something so simple, it would probably be a lot easier to put a line like

alias c='clear'

into your .bashrc file.

There is one additional comment I feel almost compelled to make and that involves the line

root>c

from the original post. I hope that doesn't mean what I think it does. It's a really good idea NOT to be root all the time. Make sure you have a normal user account and generally use that. If you're not sure why, that's probably a good topic for another thread.

Best of Luck,
Paul