This site will work and look better in a browser that supports web standards, but it should be accessible for any browser or Internet device.
If you're seeing this message, you may have to scroll to the bottom of the page to see the navigation links.

SED(1)                                                     SED(1)

       sed - a Stream EDitor

       sed [-n] [-V] [--quiet] [--silent] [--version] [--help]
           [-e script] [--expression=script]
           [-f script-file] [--file=script-file]

       ___  is  a stream editor.  A stream editor is used to per-
       form basic text transformations on an input stream (a file
       or  input from a pipeline).  While in some ways similar to
       an editor which permits scripted edits (such as  __),  ___
       works  by  making  only one pass over the input(s), and is
       consequently more efficient.  But it is ___'s  ability  to
       filter text in a pipeline which particularly distinguishes
       it from other types of editors.

       ___  may  be  invoked  with  the  following   command-line


              Print  out the version of sed that is being run and
              a copyright notice, then exit.


       --help Print a usage  message  briefly  summarizing  these
              command-line options and the bug-reporting address,
              then exit.



              By default, ___ will print out the pattern space at
              the  end  of  each cycle through the script.  These
              options disable this automatic  printing,  and  ___
              will  only  produce  output when explicitly told to
              via the p command.

       -e ______

              Add the commands in ______ to the set  of  commands
              to be run while processing the input.

       -f ___________

              Add  the commands contained in the file ___________
              to the set of commands to be run  while  processing
              the input.

       If  no  -e,-f,--expression, or --file options are given on
       the command-line, then the first  non-option  argument  on
       the command line is taken to be the ______ to be executed.

       If any command-line parameters remain after processing the
       above,  these  parameters  are interpreted as the names of
       input files to be processed.  A file name of -  refers  to
       the  standard  input stream.  The standard input will pro-
       cessed if no file names are specified.

Command Synopsis
       This is just a brief synopsis of ___ commands to serve  as
       a reminder to those who already know sed; other documenta-
       tion (such as the texinfo document) must be consulted  for
       fuller descriptions.

   Zero-address ``commands''
       : _____
              Label for b and t commands.

              The  comment extends until the next newline (or the
              end of a -e script fragment).

       }      The closing bracket of a { } block.

   Zero- or One- address commands
       =      Print the current line number.

       a \

       ____   Append ____, which has each embedded  newline  pre-
              ceeded by a backslash.

       i \

       ____   Insert  ____,  which has each embedded newline pre-
              ceeded by a backslash.

       q      Immediately quit the ___ script without  processing
              any  more  input,  except that if auto-print is not
              diabled the current pattern space will be  printed.

       r ________
              Append text read from ________.

   Commands which accept address ranges
       {      Begin a block of commands (end with a }).

       b _____
              Branch to _____; if _____ is omitted, branch to end
              of script.

       t _____
              If a s/// has done a successful substitution  since
              the  last  input line was read and since the last t
              command, then branch to _____; if _____ is omitted,
              branch to end of script.

       c \

       ____   Replace  the  selected  lines  with ____, which has
              each embedded newline preceeded by a backslash.

       d      Delete pattern space.  Start next cycle.

       D      Delete up to the first embedded newline in the pat-
              tern  space.   Start  next  cycle, but skip reading
              from the input if there is still data in  the  pat-
              tern space.

       h H    Copy/append pattern space to hold space.

       g G    Copy/append hold space to pattern space.

       x      Exchange  the  contents  of  the  hold  and pattern

       l      List out the current line in a ``visually unambigu-
              ous'' form.

       n N    Read/append the next line of input into the pattern

       p      Print the current pattern space.

       P      Print up to the first embedded newline of the  cur-
              rent pattern space.

              Attempt  to match ______ against the pattern space.
              If successful, replace that  portion  matched  with
              ___________.   The ___________ may contain the spe-
              cial character & to refer to that  portion  of  the
              pattern   space  which  matched,  and  the  special
              escapes \1 through \9 to refer to the corresponding
              matching sub-expressions in the ______.

       w      ________  Write  the current pattern space to _____

              Transliterate the characters in the  pattern  space
              which appear in ______ to the corresponding charac-
              ter in ____.

       ___ commands can be given with no addresses, in which case
       the command will be executed for all input lines; with one
       address, in which case the command will only  be  executed
       for  input  lines  which  match  that address; or with two
       addresses, in which case the command will be executed  for
       all  input  lines which match the inclusive range of lines
       starting from the first address and continuing to the sec-
       ond  address.   Three things to note about address ranges:
       the syntax is _____,_____ (i.e., the addresses  are  sepa-
       rated  by  a  comma);  the  line  which _____ matched will
       always be accepted, even if _____ selects an earlier line;
       and  if  _____  is a ______, it will not be tested against
       the line that _____ matched.

       After the address (or address-range), and before the  com-
       mand,  a !  may be inserted, which specifies that the com-
       mand shall only be executed if the  address  (or  address-
       range) does not match.

       The following address types are supported:

       ______ Match only the specified line ______.

              Match  every ____'th line starting with line _____.
              For example, ``sed -n 1~2p''  will  print  all  the
              odd-numbered  lines  in  the  input stream, and the
              address 2~5 will match every fifth  line,  starting
              with the second.  (This is a GNU extension.)

       $      Match the last line.

              Match lines matching the regular expression ______.

              Match lines matching the regular expression ______.
              The c may be any character.

Regular expressions
       POSIX.2  BREs  ______  be  supported, but they aren't com-
       pletely yet.  The \n  sequence  in  a  regular  expression
       matches  the  newline  character.  There are also some GNU
       extensions.  [XXX FIXME: more needs to be  said.   At  the
       very   least,   a  reference  to  another  document  which
       describes what is supported should be given.]

Miscellaneous notes
       This version of sed supports a \ sequence in  all
       regular  expressions, the ___________ part of a substitute
       (s) command, and  in  the  ______  and  ____  parts  of  a
       transliterate  (y)  command.   The  \ is stripped, and the
       newline is kept.

       awk(1), ed(1), expr(1), emacs(1), perl(1),  tr(1),  vi(1),
       regex(5) [well, one _____ to be written... XXX],,
       any of various books on ___, the ___ FAQ

       E-mail bug reports to  Be sure to
       include the word ``sed'' somewhere in the ``Subject:''