Linux command Rollup (WC, cut, sort, uniq)

1. WC: number of bytes, words, and lines of statistics files

format: WC [OPTION] ... [FILE] ...

Wc[option] ...--files0-from=f

Parameters:

- C : Count bytes

- M : Statistics of characters

- L : Count Rows

- W : Counting Words

Example:

[Email protected] ~]# WC abc.txt

27367 abc.txt------- à ( number of lines of words bytes file name )

[Email protected] ~]# wc-l abc.txt

abc.txt--------- à ( number of rows file name )

[Email protected] ~]# wc-c abc.txt

367 abc.txt------ à (number of bytes file name)

2. Cut : Choose the information we want from the file

format: Cut OPTION ... [FILE] ...

Parameters:

- b : Split in bytes

- C : Split in a character unit

- D : Tab Split by default

- F : With - D used together to specify which area to display

Example:

[Email protected] ~]# CAT/ETC/PASSWD

Root:x:0:0:root:/root:/bin/bash

Bin:x:1:1:bin:/bin:/sbin/nologin

Daemon:x:2:2:daemon:/sbin:/sbin/nologin

Adm:x:3:4:adm:/var/adm:/sbin/nologin

Lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin

Sync:x:5:0:sync:/sbin:/bin/sync

Shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown

Halt:x:7:0:halt:/sbin:/sbin/halt

Mail:x:8:12:mail:/var/spool/mail:/sbin/nologin

Uucp:x:10:14:uucp:/var/spool/uucp:/sbin/nologin

Operator:x:11:0:operator:/root:/sbin/nologin

Games:x:12:100:games:/usr/games:/sbin/nologin

Gopher:x:13:30:gopher:/var/gopher:/sbin/nologin

Ftp:x:14:50:ftp User:/var/ftp:/sbin/nologin

Nobody:x:99:99:nobody:/:/sbin/nologin

Vcsa:x:69:69:virtual Console Memoryowner:/dev:/sbin/nologin

Saslauth:x:499:76:saslauthduser:/var/empty/saslauth:/sbin/nologin

Postfix:x:89:89::/var/spool/postfix:/sbin/nologin

Sshd:x:74:74:privilege-separated Ssh:/var/empty/sshd:/sbin/nologin

Lin:x:555:555::/home/lin:/bin/bash

[Email protected] ~]# CAT/ETC/PASSWD | Cut-d:-f7

/bin/bash

/sbin/nologin

/sbin/nologin

/sbin/nologin

/sbin/nologin

/bin/sync

/sbin/shutdown

/sbin/halt

/sbin/nologin

/sbin/nologin

/sbin/nologin

/sbin/nologin

/sbin/nologin

/sbin/nologin

/sbin/nologin

/sbin/nologin

/sbin/nologin

/sbin/nologin

/sbin/nologin

/bin/bash

[Email protected] ~]#

3. Sort : Sort the contents of a file

format: sort [OPTION] ... [FILE] ...

Sort [OPTION] ...--files0-from=f

Parameters:  

- u Delete the duplicate parts

- bignores the space characters that begin before each line.
-CCheck that the files are sorted in order.
-Fwhen sorting, ignores uppercase and lowercase letters.
-Mthe front3the letters are sorted according to the abbreviation of the month.
-Nsorts according to the size of the numbers.
-o<Output File>The sorted result is stored in the specified file.
-Rsorted in reverse order.
-t<Delimited characters>Specifies the field separator character to use when sorting.
-KChoose which interval to sort by.

Example: [email protected] ~]# sort 1abc.txt

Abcd

Abcd

Abcd

Abcdd

Abcdd

Acbd

Ccce

Def

Efg

Efg

Efgg

Ghi

Hijk

Hijk

Hijkk

Jklc

Lmn

Lmn

Lmnn

Opqq

Rst

Uvvv

[Email protected] ~]# sort-u!$

Sort-u 1abc.txt

Abcd

Abcdd

Acbd

Ccce

Def

Efg

Efgg

Ghi

Hijk

Hijkk

Jklc

Lmn

Lmnn

Opqq

Rst

Uvvv

[Email protected] ~]#

4. Uniq : Delete duplicate content, leaving only one

format: uniq [OPTION] ... [INPUT [OUTPUT]]

Parameters:

- C : Displays the number of times the file content appears at the beginning of the display

- D : Show duplicate rows only

- u : Show rows that are not duplicated

Example:

[Email protected] ~]# Sort 1abc.txt | Uniq-d

Abcd

Abcdd

Efg

Hijk

Lmn

This article is from the "Summer Month" blog, please make sure to keep this source http://lkc0110.blog.51cto.com/3410558/1689703

Linux command Rollup (WC, cut, sort, uniq)