Need help to write Shell Script

vikrambhimbar · 05-08-2006, 05:36 AM

Hi ,

Can Any one tell me how I will be able to overwrite specific line from a file using Shell script.

For Example
Suppose from /etc/passwd file if I have to find entry of any user say user "a" and modify it with some other value....But only the entry of user "a"....How should I do this,

Please help Me.

Thanks,
Vikram

Artanicus · 05-08-2006, 06:10 AM

The easiest way to do it would be to use sed.
A sample:

Code:

cat /etc/passwd | sed 's/username.*/foouser:x:1111:111::\/home\/foouser:\/bin\/bash/'

Remember to escape the path slashes.. (: