“OR” Operation in “grep”

Since I do not need this frequently, I keep forgetting about this.

To get any lines that matches “durdane” OR “uzeyir” in a text stream you should use “\|” operator (“|” escaped with a backslash) with whole expression in quotes. See below:

 $ grep "durdane\|uzeyir" <text file>

or

 $ <some text stream> | grep "durdane\|uzeyir"