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This article mainly introduces how to use grep to display several lines of information under Linux, which has a certain reference value, and interested friends can refer to it. I hope you can learn a lot after reading this article.

Grep under standard unix/linux uses the following parameters to control the context grep-C 5 foo file to display the line that matches the foo string in the file file and five lines up and down grep-B 5 foo file to display foo and the first five lines grep-A 5 foo file to display foo and the last five lines to check the grep version number is grep-V assuming that you want to upgrade, upgrade method: the latest source code (google or Baidu search home page), compile and install somewhere Such as / home/aaa/bin/, then use / home/aaa/bin/grep later, or add / home/aaa/bin to the PATH environment variable.

Grep under standard unix/linux controls the context through the following parameters

Grep-C 5 foo file displays the line that matches the foo string in the file file and 5 lines up and down grep-B 5 foo file shows foo and the first 5 lines grep-A 5 foo file shows foo and the last 5 lines

The way to check the grep version number is

Grep-V

Suppose you want to upgrade, upgrade the method: the latest source code (google or Baidu search home page), compile and install somewhere, such as / home/aaa/bin/, then use / home/aaa/bin/grep later, or add / home/aaa/bin to the PATH environment variable. Suppose you overwrite the newly compiled grep to your current grep folder, and the upgrade will be done naturally.

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