The Linux uniq command

Uniq-report or omit repeated lines omit duplicate rows

Parameters:

-I ignores the difference between uppercase and lowercase characters

-C to count repeated rows

Note: The Uniq command will only de-weight adjacent duplicate rows, so uniq is often used with the sort command, and the sort command can line up duplicate rows and then use Uniq to repeat the count

[Email protected] test]#Catc.txt aabaaabbbdb[[email protected] test]#CatC.txt |UniqAbabdb[[email protected] test]#CatC.txt |Uniq-c //only to the adjacent row to go to the weight 2a1b3a3b1D1B[[email protected] test]#CatC.txt |Sort|Uniq-c //combine the sort command with 5a5b1D[[email protected] test]# Last|Cut-D" "-f1|Sort|Uniq-C1       AChenyao6Chenyao13Oldgirl $reboot107Root1Wtmp[[email protected] test]#

The Linux uniq command