Sed for simple operation of Linux commands

Sed

SED syntax format:

Sed[options] ' command ' file (s)

Sed common options:

-N: Only the line (or action) that has been specially processed by SED is listed.

-E: Combining multiple SED commands

-F: Perform sed action within filename

-r:sed's actions support the syntax of extended formal notation.

-I: Directly modifies the contents of the read file, not the screen output

Sed common commands:

A: Append sed ' a xxx ' file after each line append xxxx sed ' $a xxx ' file last line append

I: Insert the sed ' i xxx ' file before inserting xxx into each line

C: replace sed ' 2c xxx ' file second line with XXX instead

D: Delete sed '/^$/d ' file delete blank line sed ' 1,5d ' file delete 第1-5 line

S: replace sed ' s/pattern/replace_str/g ' file/g means that SED will replace each match, otherwise it is the first match

&: A string that marks a matching style and can use matched content when replacing a string

\1 or \ 2:1th or 2nd matching string

Application:

1, &: Tag a string that matches a style, you can use matched content when replacing a string

2, \1 or \ 2:1th or 2nd matched string, \ (pattern\) for matching substring, pattern is included in () with Slash escaped

3. Combine multiple SED commands with pipelines

Sed ' expression ' | Sed ' expression '

Sed ' expression;expressiong '

Sed-e ' expression '-e ' expression '

Sed for simple operation of Linux commands