Text Processing command: Cut,sort,wc,uniq

Text Processing commands:

Cut ,sort ,WC ,uniq

Cut Select a paragraph in a piece of information, and the information is processed in "Rows".

syntax:cut OPTION ... [FILE] ...

Parameters:

–d ' separators '

–f # Segmentation by character, showing section #

#, #,#: 1,3,5 shows the information ofparagraph 1, 3, and5

#-#:2-4 Display The information in paragraphs 2 through fourth

–c # Remove fixed-character intervals in units of characters for orderly processing

#- Displays the value after the # characters

#-# display values for the selected interval

Example

[Email protected] test]# cat test_cuthow are you? how old are  you? where are youfrom? how do it? #以? For the separator, the 2nd message is displayed [[email protected]  test]# cut -d  '? '  -f 2 test_cut howold are you# Displays the 2nd and 4th paragraphs with the? ]# cut -d  '? '  -f 2,4test_cut howold are you? how do it# Displays the 2nd to 4th paragraph with the?  protected] test]# cut -d  '? '  -f 2-4test_cut howold are you? where are you from? how  do it# Displays the contents after the 8th character [[email protected] test]# cat test_cutaaaa 1   how are you ?aaaa 1  how old are you?aaaa 1   practice make pefectaaaa 1  so good! [[email protected] test]# cat test_cut | cut -c 8-  howare you ?  howold are you?  practice make pefectso good!

Sort Sort

syntax:sort [OPTION] ... [FILE] ...

Parameters:

-F: Ignore case

-B: Ignores the first whitespace part

-M: Sort by the name of the month,

-N: Sorting using "number"

-R: Reverse sort

-U: Quite with Uniq, go repeat

-T: delimiter, TAB is used by default

-K: Which interval field to sort ( and T to use )

Example

#默认按第一个文字排序 [[email protected] test]# cat /etc/passwd | sortabrt:x:173:173::/etc/ abrt:/sbin/nologinadm:x:3:4:adm:/var/adm:/sbin/nologinapache:x:48:48:apache:/var/www:/sbin/ nologinavahi-autoipd:x:170:170:avahi ipv4llstack:/var/lib/avahi-autoipd:/sbin/nologinbin:x:1:1:bin:/bin:/ Sbin/nologindaemon:x:2:2:daemon:/sbin:/sbin/nologindbus:x:81:81:system messagebus:/:/sbin/nologinftp:x : 14:50:ftp user:/var/ftp:/sbin/nologingames:x:12:100:games:/usr/games:/sbin/nologingdm:x:42:42::/var/lib/ gdm:/sbin/nologingopher:x:13:30:gopher:/var/gopher:/sbin/nologin# Reverse Sort-r[[email protected] test]#  cat /etc/passwd | sort-rvcsa:x:69:69:virtual console memoryowner:/dev:/sbin/ Nologinuucp:x:10:14:uucp:/var/spool/uucp:/sbin/nologinusbmuxd:x:113:113:usbmuxduser:/:/sbin/nologintcpdump:x : 72:72::/:/sbin/nologinsync:x:5:0:sync:/sbin:/bin/syncsshd:x:74:74:privilege-separatedssh:/var/empty/sshd:/ sbin/nologinshutdown:x:6:0:shutdown:/sbin:/sBin/shutdownsaslauth:x:498:76:saslauthduser:/var/empty/saslauth:/sbin/nologinrtkit:x:499:497:realtimekit:/proc :/sbin/nologinrpc:x:32:32:rpcbinddaemon:/var/cache/rpcbind:/sbin/nologinrpcuser:x:29:29:rpc serviceuser:/ After the var/lib/nfs:/sbin/nologin# is split, sort by the established field [[email protected] test]# cat /etc/passwd |  sort-t  ': '  -k 3 -nroot:x:0:0:root:/root:/bin/bashbin:x:1:1:bin:/bin:/sbin/ nologindaemon:x:2:2:daemon:/sbin:/sbin/nologinadm:x:3:4:adm:/var/adm:/sbin/nologinlp:x:4:7:lp:/var/spool/lpd:/ sbin/nologinsync:x:5:0:sync:/sbin:/bin/syncshutdown:x:6:0:shutdown:/sbin:/sbin/shutdownhalt:x:7:0:halt:/sbin:/ Sbin/haltmail:x:8:12:mail:/var/spool/mail:/sbin/nologin

Uniq : To repeat

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

Parameters:

-I: Ignore uppercase and lowercase letters

-C: Counting

Example:

# to repeat [[email protected] test]# Last | Cut-d '-F 1 |sort | Uniq rebootrogerrootwtmp# count repetitions [[email protected] test]# Last | Cut-d '-F 1 |sort | UNIQ-C 1 5 reboot Roger Root 1 wtmp

WC: number of words, lines, characters in the statistics file

syntax:WC [OPTION] ... [FILE] ...

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

Parameters:

-L: list only travel

-W: Lists only the number of words

-M: How many characters

Example:

#同时系统中有多少用户 [[email protected] test]# CAT/ETC/PASSWD | Wc-l34 If there is any mistake, please correct me! Thank you!

Text Processing command: Cut,sort,wc,uniq