Shell script to edit a file

kaash_m31 · 06-02-2008, 05:19 AM

Hi Experts,

I am new to shell scripting.I have a requirement, in which I have to fill a value of a parameter using a script.

for example:
I have a file ("testfile.txt") whose contents are:
================================
line1.color: red
line2.size:10
line3.path:
line4.display:default
================================

In the above content of file, I have to fill the third parameter with some value say "/usr/dir". Please help me in writing a script to fill that value.
Thanks in advance.

unSpawn · 06-02-2008, 05:36 AM

If you have no clue then best start here I think:
http://www.tldp.org/HOWTO/Bash-Prog-Intro-HOWTO.html
http://www.tldp.org/LDP/Bash-Beginne...tml/index.html
http://www.tldp.org/LDP/abs/html/

pinniped · 06-02-2008, 05:43 AM

Sounds like a job for 'sed' (I can't see how the shell would do it all - then again I'm definitely no shell guru).

This sounds like homework to me, so I'll say: read the sed manual