Shell script commands

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# # # #6. Shell script Command # # #

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# # # #1. diff####

diff file File1 # # compare two different files

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- C # # Displays the surrounding rows

- u # # generate patches in one format unified output

- R # # Compare the different files in two directories

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Patch file File.path # # hit patch

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- b # # back up the original file

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# # # #2. grep####

grep Key Characters File | Catalogue # # Find rows in a file or directory that contain keywords

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grep - I. # # Ignore case

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- N # # Displays the line of keywords

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- C # # shows the number of filtered results

- v # # Reverse filter

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- E " keyword 1| Key Words 2 " # # filter multiple keywords

- R Catalogue # # Find files with keywords in the directory

Note: ^ keywords # # starts with a keyword

keyword $ # # ends with a keyword

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# # # #3. cut####

Cut # # intercept characters

cut-d Separators # # Specify delimiter

cut-f 1,7 # # Displays the specified columns

cut-c 1-4 # # Displays the specified characters

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Cut-c 1,4

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# # # #4. sort#### # # Sort

Sort

- N # # Pure digit sort

- u # # go redundant

|uniq-c # # Remove redundancy and count redundancy times

- T # # Specify delimiter

- k # # Specify columns

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# # # #5. uniq###

Sort file |uniq-c # # Remove redundancy and count redundancy times

- D # # show redundant rows

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- u # # show unique rows

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# # # #6. sed####

Sed ' s/ original character / replacement character /g ' file

Sed-e ' strategy 1 '-e ' policy 2 ' file

sed-i File # # Enter the converted content into the specified file

sed ' 3,5s/ original character / replacement character /g ' # #3-5 line replacement

sed xd # # masking specified lines

sed xp # # Copy the specified row

sed-n XP # # only shows the reference

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. Sed # # Control flow output

sed ' s/nologin/westos/g ' passwd # # Nologin in the replacement output is westos

## replace the output with 1-5 nologin Span style= "font-family: ' Times New Roman ';" >wesots

sed '/games/,/nobody/s/nologin/westos/g ' passwd # # Replace the Games characters in the output to Nobody characters between nologin Westos

sed-e ' s/nologin/westos/g '-e ' s/sbin/lee/g ' passwd # # multiple substitution policies with- e connection

sed 3d passwd # # does not display the third line in the file

sed 3,7d file # # does not show 3-7 lines in the file

sed 3,7p file # # repeats the 3-7 lines in the file

sed-n 3,7p File # # shows only 3-7 lines in the file

Shell script commands