i need to know the difference between two commands
ps -ef|grep oracle
ps -ef|grep -v grep |grep oracle
Here is the problem ( Exercise 3-3, Using The Shell of The Unix Programming Environment, Kerninghan, Pike, 3rd edition ):
Predict what each of the following grep commands will do, and then verify your understanding.
A file containing these command
I'm a newbie on regular expression and want to do some practicing with the 'grep' command. However, I have noticed that people have been using the following commands for rgx.