sed to replace text

[Greslore]

Short, sweet, and quick question:

contents of /etc/blah.conf:
blah1
blah1
blah2
blah2
blah1

How do I use sed to change all the blah1 in /etc/blah.conf with the word scoobie?

[LotsOfPhil]

sed -i 's/blah1/scoobie/g' /etc/blah.conf

The -i makes it edit the file in place.

[Greslore]

Bingo.. that did it. I was using:

sed 's/blah1/scoobie/g' /etc/blah.conf

That -i did the trick. Thank you kindly good sir =)

[jblebrun]

sed -i 's/blah1/scoobie/g' /etc/blah.conf

The -i makes it edit the file. It's the same as sed '...' /etc/blah.conf > /etc/blah.conf

CAUTION! No, it's not the same!!

The second command will obliterate your blah.conf file, turning it into an empty file. I've been bittern by that one before.

[LotsOfPhil]

True, true. I meant in a pseudocode kinda way. I edited the post to remove the offending (damaging :)) passage.