Linux grep displays a few lines of information before and after

Linux grep displays a few lines of information before and after

grep under standard Unix/linux controls the context using the following parameters

Grep-c 5 Foo file displays the line with the Foo string in the file and the top and bottom 5 lines
Grep-b 5 foo file shows Foo and the first 5 rows
Grep-a 5 foo file shows Foo and the following 5 rows

The way to view the grep version number is
Grep-v

If you want to upgrade, upgrade method: The latest source code (Google or Baidu search home), compile and install to a place, for example/home/aaa/bin/then use the/home/aaa/bin/grep, or/home/aaa/bin Add the PATH environment variable to it. If you overwrite the newly compiled grep into the folder where you are now grep, the upgrade is done naturally

Linux grep displays a few lines of information before and after