Linux under grep query contains contextual information for a keyword __linux

Linux under grep displays multiple lines of information

The grep under standard Unix/linux controls the context through the following parameters

Grep-c 5 Foo file displays the line in the file matching the Foo string and the top and bottom 5 lines

Grep-b 5 foo file shows Foo and top 5 lines

GREP-A 5 foo file displays foo and the following 5 lines

If you want to import this content into a specified file, you can

Grep-c 5 foo File > NewFile

This is useful for finding problems in the server log

Count the numbers that contain a keyword

Grep-o Keyword FileName | Wc-l
If you have at most one keyword in a row, you can abbreviate:
grep-c keyword FileName

The way to view the grep version is

Grep-v