linux grep command – grep only show match

When we search for content, sometimes we just need to show matching content.

At this time we can use the grep command.

linux grep

➜ ~ grep 'line-number' test4.txt

You can also display the line number where the matching content is located.

linux grep -n

➜  grep -n 'line-number' test4.txt

Of course, you can also display the upper N lines, the lower N lines, or the upper and lower N lines of the line where the matching content is located.

linux grep -n -C

Show num lines before and after matching – grep -C

➜  grep -n -C 3 'line-number' test4.txt

Grep -C More info: grep show lines before and after