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Redis
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Sed

Sed commands

Misc Flags

Flag Description
/ | ^ @ ! # Substitution delimiter can be any character
& Gets the matched pattern
( ) \1 \2 \3 Group using ( and ).Use \1, \2 in replacement to refer the group

Loops commands

Command Description
b label Branch to a label (for looping)
t label Branch to a label only on successful substitution(for looping)
:label Label for the b and t commands (for looping)
N Append next line to pattern space
P Print 1st line in multi-line
D Delete 1st line in multi-line

Flags

$ sed 's/old/new/[flags]' [input-file]
Flag Description
g Global substitution
1,2... Substitute the nth occurrence
p Print only the substituted line
w Write only the substituted line to a file
I Ignore case while searching
e Substitute and execute in the command line

Space commands

Command Description
n Print pattern space, empty pattern space, and read next line
x Swap pattern space with hold space
h Copy pattern space to hold space
H Append pattern space to hold space
g Copy hold space to pattern space
G Append hold space to pattern space
See also: File spacing

Commands

Command Example Description
p sed -n '1,4 p' input.txt Print lines 1-4
p sed -n -e '1,4 p' -e '6,7 p' input.txt Print lines 1-4 and 6-7
d sed '1,4 d' input.txt Print lines except 1-4
w sed -n '1,4 w output.txt' input.txt Write pattern space to file
a sed '2 a new-line' input.txt Append line after
i sed '2 i new-line' input.txt Insert line before
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