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Summary of sed Commands

a\

append lines to output until one not ending in \

b label

branch to command : label

c\

change lines to following text as in a

d

delete line; read next input line

i\

insert following text before next output

l

list line, making all non-printing characters visible

p

print line

q

quit

r file

read file, copy contents to output

s/old/new/f

substitute new for old. If f=g, replace all occurrences; f=p, print; f=w file, file to file

t label

test: branch to label if substitution made to current line

w file

write line to file

y/str1/str2/

replace each character from str1 with corresponding character from str2 (no ranges allowed)

=

print current input line number

!cmd

do sed cmd only if line is not selected

: label

set label b for t commands

{

treat commands up to matching } as a group