sed as a line editor to edit text
sed to edit the file, but not change the source file
sed works:
Specifies a text file, a text file to read the contents of each line, is read into the pattern space (PATTERN SPACE), matching text (regular expression) in the pattern space, matching the content of the modified (replaced, delete, modify, print, save)
usage:
sed [parameters] "sed own independent use format statement" [Text File]
Parameter options:
-n reject the default display
-r specify extended regular expressions
Match IP
1, with all that is not
2, | or
-e write script
-f script file specified
-L length specified text wrap
-i directly modify the contents of the file
Address delimitation way
1, the direct matching value
sed -n '5,7'p text file
2, d ~ step
sed -n '1 ~ 3p' Text File
3, $ specified Gyoo
sed -n '10 ~ $ p 'Text File
4 / regular /
sed -n '/ k \ {5, \} /, $ p' Text File
5、0，addr
addr can be a digital / $ / regular expression
sed -n '0, / k, {5 ,,} p' Text File
6、addr，+N
Addr addr arranged row after row N
sed -n '/ fd /, + 5p' Text File
Common commands
p print Print
d delete
c Replace
sed "/ aaa / c \ A" Text File
n N read / add content to the next row pattern matching row in its operating
w Save the file contents to a new file
s text Alternatively, a default matching pattern space to replace the contents of the
Syntax: s / pattern / string /
Middle / can be replaced by any one of the special character
sed of advanced applications
Mode space - hold space