< CRTL > + r for Search in terminal command line

"This is used to search already executed command in Linux terminal."

We waste timings by retyping the command often for a small argument changes. But this is not worthy, Hmmm you can use CRTL + r to searching the already executed commands.

USAGE:
Press CRTL + r and enter text to match the already executed command. Matching results will be dispalyed, so now you can reuse them.