Linux grep\head\tail Command Use (Sixth chapter)

The Grep\head\tail command uses

Test.txt
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Test
Liyao
Oldboy

grep command:
1. Exclude text content including Oldbody characters (grep-v command exclusions)
[[email protected] kang]# grep -v "oldboy" test.txt
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Test
Liyao

2. Find only files that contain oldbody characters.

[[email protected] kang]# grep "oldboy" test.txtoldboy

Head Header command
1. Find the first 5 lines of data in a file
[[email protected] kang]# head -n 5 test.txt
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5

Tail Tail command
1. Find 3 rows of data after the file
[[email protected] kang]# tail -n 3 test.txt#默认后10行
Liyao
Oldboy

2.tail Dynamic View Back
[[email protected] kang]# tail -fn 100 test.txt

Linux grep\head\tail Command Use (Sixth chapter)