Shell programming Character intercept commands

1. Field (column) Extraction command: Cut [option] file name

Options:-F column number (extract the first few columns)-D delimiter (split column by specified delimiter)

[email protected] sh]# cat student.txt idnamegendermark1alex male 112boby male 223cyan male 334daugemale 44[[email Protected] sh]# cut-f 2 student.txt   #-F Set column number Namealexbobycyandauge[[email protected] sh]# cut-f 2,4 student.txt Nam Emarkalex 11boby 22cyan 33dauge44[[email protected] sh]# grep "/bin/bash"/etc/passwd | Grep-v "Root"  #-V to take anti-user1:x:502:502::/home/user1:/bin/bashuser2:x:503:503::/home/user2:/bin/bash[[email Protected] sh]# grep "/bin/bash"/etc/passwd | Grep-v "Root" | Cut-f 1-d ":"  #-D set delimiter

2. Format output command: PRITF ' output type output format ' output content

　　

　　

[email protected] sh]# cat Student.txt Idnamegendermark1alexmale112bobymale223cyanmale334daugemale44[[email Protected] sh]# printf '%s\t%s\t%s\t%s\n ' $ (cat student.txt) Idnamegendermark1alexmale112bobymale223cyanmale334daugemale44

3. The awk command

　　

　　

　　

　　

　　

4. SED command

　　

　　

　　

　　

　　

　　

　　

Shell programming Character intercept commands