replace string by another string in bash shell

chinhth2010 · 08-02-2011, 08:17 PM

Dear user
I want to write a shell.sh to replace a tring by other string in one file.
example: in my convert.gs file has a string as bellow
'set z 1'
Now I want to find this line and replace into 'set z 2'
Please anyone tell me how to do
Thank you

sycamorex · 08-02-2011, 08:19 PM

Quote:

Originally Posted by chinhth2010

Dear user
I want to write a shell.sh to replace a tring by other string in one file.
example: in my convert.gs file has a string as bellow
'set z 1'
Now I want to find this line and replace into 'set z 2'
Please anyone tell me how to do
Thank you

Please have a look at the 'sed' command.
Here's a good tutorial:
http://www.grymoire.com/Unix/Sed.html

lithanus · 08-02-2011, 10:40 PM

Quote:

Originally Posted by chinhth2010

Dear user
I want to write a shell.sh to replace a tring by other string in one file.
example: in my convert.gs file has a string as bellow
'set z 1'
Now I want to find this line and replace into 'set z 2'
Please anyone tell me how to do
Thank you

As sycamorex states, sed is what you are looking for. In this case, it would be

Code:

cat convert.gs | sed -e 's/set z 1/set z 2/g' > new-convert.gs

Jay