Linux Text Processing command "sed" simple solution

Text Processing Edit command SED

Command format:

sed [option] ' (intercepted line) [action] ' file name

Option:-N: Only the rows that have been processed by SED are output

-e: Allow more than one action to be entered

-i:sed the modified result to the file

Intercept line: (1) Enter line number directly

(2)/Regular expression/

(3) x, y lines, or a regular replacement

(4) x,y! Reverse

(5) X~y starting from X line, step y line

(6) $ document at the end

Action: P print eg:sed-n ' (line) p ' student.txt

Add a new line after line A, add a new line before the I line

Sed ' 1,5a ============= ' student.txt

Sed '/regular//============ ' Student.txt

D Delete a row

Sed '/regular/d ' student.txt

Sed ' 4d ' student.txt

C replaces the specified line

Sed ' 2c canglaoshi bujigee ' Student.txt

Sed '/regular/C Lalalalalalala ' Student.txt

s replaces the specified string (replaces the first one in each line), and the end G indicates that each line

Sed '/Regular (anchor line)/s/regular (old)/ABCD (new)/' Student.txt

Sed ' s/regular (old)/ABCD (new)/' Student.txt (full text replacement)

Sed '/www/s/33/000/g ' zz_test.txt

Operation: {} Multiple command combinations, separated by;

Sed ' {1,20p;s/www/s/33/000//g} '

& Take the original character

Sed ' s/abc/&def ' student.txt (change ABC to ABCDEF)

U string first letter to uppercase

Sed ' s/abc/\u&/' student.txt (change ABC to ABC)

L Change the first letter of the string to lowercase

U string All letters are changed to uppercase

Sed ' s/abc/\u&/' student.txt (change ABC to ABC)

L string All letters are changed to lowercase

R inserts a file into the specified line of another file

Sed ' 1r abc.txt ' 123.txt (inserts the contents of Abc.txt into line 1th of the 123.txt file)

Q Exit SED

Sed '/false/q ' student.txt (Find a false to exit SED)

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Linux Text Processing command "sed" simple solution