Shell programming The Four musketeers sed

(1) SED effect

SED is a non-interactive text editor, and the Contrast VI (VIM) is an interactive editor

(2) SED syntax

sed [-option] [command] Files

Comments:

SED tool default processing text, text content output screen has been modified, but the contents of the file is not modified, need to add I parameter to completely modify

(3) SED combat

SED Combat Replacement text

<1> jfedu.txt file, replace all the old in the file with the new

Sed ' s/old/new/g ' jfedu.txt

<2> jfedu.txt file, replace http://www.jd.com with http://www.baidu.com

Sed ' s#http://www.jd.com#http://www.baidu.com#g ' jfedu.txt

SED Actual Combat Print text

<1> jfedu.txt file, print the first line

Sed-n ' 1p ' jfedu.txt

<2> jfedu.txt file, print 1 to 3 lines

Sed-n ' 1,3p ' jfedu.txt

<3> jfedu.txt file, print the last line

Sed-n ' $p ' jfedu.txt

<4> jfedu.txt file, print the first line and the last line

Sed-n ' 1p; $p ' Jfedu.txt

<5> jfedu.txt file, print the first line to the last line

Sed-n ' 1, $p ' Jfedu.txt

<6> jfedu.txt file, print/linux/this line

Sed-n '/linux/p ' jfedu.txt

<7> jfedu.txt file, print the first line and the last line (implemented with the-e extension parameter)

Sed-n ' 1p '-e ' $p ' jfedu.txt

<8> jfedu.txt file, match/linux/this line and/test/this line, print out

Sed-n '/linux/,/test/p ' jfedu.txt

<9> jfedu.txt file, match/linux/this line to the last line, print out

Sed-n '/linux/, $p ' Jfedu.txt

Sed combat Delete text

<1> jfedu.txt file, delete the first line to line 3rd

Sed ' 1,3d ' jfedu.txt

<2> jfedu.txt file, delete the Linux match line to the last line

Sed '/linux/, $d ' Jfedu.txt

Sed actual combat Insert text

<1> jfedu.txt file, find the/linux/line, and add word characters to the next line

Sed '/linux/aword ' jfedu.txt

<2> jfedu.txt file, find the/linux/line, and add word characters on the previous line

Sed '/linux/iword ' jfedu.txt

<3> jfedu.txt file, find/linux/this line, add Word characters on the previous line, add Word characters on the next line

Sed-e '/linux/aword '-e '/linux/iword/' jfedu.txt

<4> jfedu.txt file, find the line that ends with test and add word characters at the end of its line

Sed ' s/test$/&word/g ' jfedu.txt

<5> jfedu.txt file, find the line where/www/, add word characters at the beginning of its line

Sed ' www/s/^/&word/g ' jfedu.txt

<6> jfedu.txt file, look for lines ending in COM and add at the end of the line. Finds the row in which/mpt/is added at the beginning of the line.

Sed-e ' s/com$/&./g '-e '/mpt/s/^/&./g ' jfedu.txt

<7> Print roots with SED

Sed-n ' s/\//p '

<8> sed to read variables and replace them

Website=www.jfedu.net

Sed ' s/www.jd.com/$website/g ' jfedu.net

Shell programming The Four musketeers sed