SED(1) SED(1) sed - sed [-V] [--version] [--help] [-n] [--quiet] [--silent] [-l N] [--line-length=N] [-u] [--unbuffered] [-E] [-r] [--regexp-extended] [-e script] [--expression=script] [-f script-file] [--file=script-file] [script-if-no-other-script] [file...] Sed . ( ). ( ed) sed . sed . -n --quiet --silent --debug -e script --expression=script -f script-file --file=script-file --follow-symlinks -i[SUFFIX] --in-place[=SUFFIX] ( SUFFIX) -l N --line-length=N 'l' --posix GNU. -E -r --regexp-extended ( POSIX -E). -s --separate . --sandbox ( e/r/w). -u --unbuffered -z --null-data NUL --help --version -e --expression -f --file sed . . GNU sed: . GNU: . : . sed sed ( texinfo) . "" : label b t. #comment ( -e). } { }. = . a \ text . i \ text . q [exit-code] sed . GNU. Q [exit-code] sed . GNU. r filename _. R filename _. . GNU. { ( }). b label label label . c \ text . d . . D d. . h H / . g G / . l " ". l width " " width. GNU. n N / . p . P . s/regexp/replacement/ regexp . replacement. replacement & \1 \9 regexp. t label s/// t T label label . T label s/// t T label label . GNU. w filename _. W filename _. GNU. x . y/source/dest/ source dest. sed . : addr1,addr2 ( ) addr1 addr2 addr2 regexp addr1. ( ) ! ( ) . : ( -s ). first~step step first. "sed -n 1~2p" 2~5 . first sed step. ( ). $ . /regexp/ regexp. "s///". \cregexpc regexp. c . GNU sed : 0,addr2 " " addr2. 1,addr2 addr2 0,addr2 1,addr2 . addr2 . addr1,+N addr1 N addr1. addr1,~N addr1 addr1 N. POSIX.2 BREs . \n \a \t . -E GNU sed POSIX. bug-sed@gnu.org. "sed --version" . Jay Fenlason Tom Lord Ken Pizzini Paolo Bonzini Jim Meyering Assaf Gordon. sed SELinux. GNU sed: . GNU: . : . (C) 2026 (Free Software Foundation, Inc.). GPLv3+: GNU GPL 3 . . : . . awk(1) ed(1) grep(1) tr(1) perlre(1) sed.info sed sed (http://sed.sf.net/grabbag/tutorials/sedfaq.txt) http://sed.sf.net/grabbag/. sed Texinfo. info sed info sed . 3 . . : . GNU sed 4.10 2026 SED(1)