Select line 5
> sed -n '5p' rumenz.txt
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Select 4 rows from 2 to 5
> sed -n '2,+3 p' rumenz.txtCopy the code
Select odd rows
> sed -n '1~2 p' rumenz.txt
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Select even rows
> sed -n '2~2 p' rumenz.txt
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Print from line 2 to the end of the text
> sed -n '2,$ p' rumenz.txt
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Select the line with the rumenz word, and the next three lines.
> sed -n '/rumenz/,+3 p' rumenz.txt
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Select the data between the line that starts with rumenz and the line that appears with the word zhan
> sed -n '/^rumenz/,/zhan/ p' rumenz.txt
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P means print
Delete the data in rows 2 through 5
> sed '2,5 d' rumenz.txt
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Note: the -i parameter is not added to the file, but deleted on the terminal. The original file is not deleted on lines 2 to 5.
Save the data in lines 2 through 5 to1.txt
> sed -n '2,5 w 1.txt' rumenz.txt
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Select the data between the line starting with rumenz and the line that appears zhan, and replace a with B
> sed -n '/^rumenz/,/zhan/s/a/b/g' rumenz.txt
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Select the line with the rumenz word, and the next three lines, and replace all a with B
> sed '/rumenz/,+3 s/a/b/g' rumenz.txt
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willrumenz.txt
In the texta
replaceb
And written to the2.txt
file
> sed -n 's/a/b/gipw' rumenz.txt
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Regular escape
Many characters need to be escaped because of the re. You do a lot of \, * stuff in the script. You can use | ^ @! Four characters to replace
> sed '/aaa/s/\/etc/\/usr/g' rumenz.txt > sed '/aaa/s@/etc@/usr@g' rumenz.txt > sed '/aaa/s^/etc^/usr^g' rumenz.txt > sed '/aaa/s|/etc|/usr|g' rumenz.txt > sed '/aaa/s! /etc! /usr! g' rumenz.txtCopy the code
The above five commands are equivalent
Replace the backup source file
> sed -i.bak 's/a/b/g' rumenz.txt
> ls
rumenz.txt.bak rumenz.txt
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Output lines of at least 50 characters
> sed -n '/^.{50}/p'
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Look for the PHP files in your directory and delete any line-level comments
> find . -name "*.php" | xargs sed -i.bak '/^[ ]*#/d'
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Print all lines starting with first and ending with end
> sed -n '/^first.*end$/p' rumenz.txt
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Append from line 2 to line lastrumenz
> sed '2,$ s/$/rumenz/' rumenz.txt
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From line 2 to the beginning of the last linerumenz
> sed '2,$ s/^/rumenz/' rumenz.txt
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View discontinuous lines and ranges
> sed-n-e '2,5p' -e '4,9p' rumenz.txtCopy the code
Remove the comments
> sed '/^#\|^$\| *#/d' rumenz.txt
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The files in thezip
.Zip
Unified substitution byrar
> sed 's/[zZ]ip/rar/g' rumenz.txt
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Make two or more substitutions at a time
> sed -i 's/that/this/gi; s/line/rumenz/gi' rumenz.txtCopy the code
Deletes the last line of the file
> sed "$d" rumenz.txt
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willrumenz.txt
In the text torumenz
The opening line is saved to1.txt
file
> sed -n '/^rumenz/w 1.txt' rumenz.txt
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Original link :rumenz.com/rumenbiji/l… Wechat official account: entry station