How to add vi command in shell script

[priyankapendkar]

Hi,

I need to delete all the lines which does not contain the "error" word in a file.
so, in vi, I would use
:v/error/d and then save the file.

How can I achieve this in command line?

Thanks in advance

[mac11]

I'd use grep

This will print all the "error" lines to stdout (assuming your file is called "filename")

grep error filename
 

you can redirect if you want it to go to a file

To replace the file in place you can also use sed

sed -ie '/error/!d' filename