Examples of SED usage (incomplete content) __shell

Examples of SED usage

1. Replace the command s, do not change the original file
Sed ' s /book/bookall/' mysed
Sed-n ' s/book/bookall/' mysed	-N use alone will not output any content
Sed ' s/book/bookall/p ' mysed	P is used alone, is the default output
Sed-n ' s/book/bookall/p ' mysed	-N, P used together, only output changed rows
Sed-i ' s/book/bookall/' mysed	-I AIX does not support
2. G Comprehensive Replacement logo
Sed ' s /book/bookall/g ' mysed	The default is full replacement
Sed ' s/book/bookall/ ' mysed	Replace from Nth, note that no G
/	/the definition in SED can also be other such as: or |
Sed '/\/youbook/mybook/'	' Internal definition must be escaped
3. Delete Operation D command
Sed '/^$/d ' mysed	Delete blank line
Sed ' 4d ' mysed	Delete 4th line of file
Sed ' 2, $d ' mysed	Delete all rows from 2 to the end of the line
Sed ' $d ' mysed	Delete last line
Sed '/^book/' d mysed or sed '/^book/d ' mysed	Delete all lines at the beginning of book
Matched string Tag &
echo This is my i-learning of sed | Sed ' s/\w\+/[&]/g '	Regular expression \w\+ match every word, use "&" to replace it,& each word it matches before (AIX doesn't seem to work)
Sed ' s/^book/& of mathbook/' mysed	Works
SUBSTRING matching tag \1
echo This is digit 7 in a number | Sed ' s/digit \ ([0-9]\)/\1/'	Replace the left command with a matching substring digit 7 is replaced with 7, and the style matches the substring is 7,\ (...) \ used to match substrings, and for the first substring matched to \1, and so on \2
echo a B | Sed ' s/\ ([a-z]\) \ ([a-z]\)/\2 \1/'	A b position swap, a B if it's a word.
Sed-n ' s/^\ (book\)/\1s/p ' mysed	Book at start position, marked as \1
Combining expressions
Sed ' expression 1 ' | Sed ' expression 2 ' is equivalent to sed ' expression 1; expression 2 '
Test=hello echo Hello World | Sed "s/$test/hello/"	sed expressions can be referenced using single quotes, but if an expression contains a variable string inside, you need to use double quotes
The range of selected rows, (comma)
Sed-n '/mybook/,/fine/p ' mysed	All rows in the range determined by the template MyBook and check are printed
Sed-n ' 5,/^fine/p ' mysed	Print all rows from line fifth to the first line that contains the beginning of fine
Sed-n '/mybook/,/fine/s/$/aaa ccc/p ' mysed	For the line between the template MyBook and the fine, the end of each line is replaced with the string AAA CCC
Multi-point Edit e command
Sed-e ' 1,5d '-e ' s/book/shitbook/' mysed	The-e option allows multiple commands to be executed on the same line, and the order in which the commands are executed affects the results
Read from file into the R command
Sed '/fine/r readfile ' mysed	Append the content read from the ReadFile to the line behind the fine
Write File W command
Sed-n '/fine/w WriteFile ' mysed	Write data from mysed that contains fine rows to WriteFile
Append (line) a\ command
Sed '/^fine/a\this is me line ' mysed	Append the This is I line to the lower of the fine start Wokrs
Sed-i ' 2a\this is my food ' mysed	Append the This is to the lower of the second row not Wokrs
Insert on Row i\
Sed '/^fine/i\this is your prite ' mysed