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STDBUF(1)                                           User Commands                                           STDBUF(1)



NAME
       stdbuf - Run COMMAND, with modified buffering operations for its standard streams.

SYNOPSIS
       stdbuf OPTION... COMMAND

DESCRIPTION
       Run COMMAND, with modified buffering operations for its standard streams.

       Mandatory arguments to long options are mandatory for short options too.

       -i, --input=MODE
              adjust standard input stream buffering

       -o, --output=MODE
              adjust standard output stream buffering

       -e, --error=MODE
              adjust standard error stream buffering

       --help display this help and exit

       --version
              output version information and exit

       If MODE is 'L' the corresponding stream will be line buffered.  This option is invalid with standard input.

       If MODE is '0' the corresponding stream will be unbuffered.

       Otherwise  MODE  is  a  number which may be followed by one of the following: KB 1000, K 1024, MB 1000*1000, M
       1024*1024, and so on for G, T, P, E, Z, Y.  In this case the corresponding stream will be fully buffered  with
       the buffer size set to MODE bytes.

       NOTE:  If  COMMAND adjusts the buffering of its standard streams ('tee' does for e.g.) then that will override
       corresponding settings changed by 'stdbuf'.  Also some filters (like 'dd' and 'cat' etc.)  don't  use  streams
       for I/O, and are thus unaffected by 'stdbuf' settings.

       GNU  coreutils  online  help:  <http://www.gnu.org/software/coreutils/>  Report  stdbuf  translation  bugs  to
       <http://translationproject.org/team/>

EXAMPLES
       tail -f access.log | stdbuf -oL cut -d ' ' -f1 | uniq
       This will immedidately display unique entries from access.log

BUGS
       On GLIBC platforms, specifying a buffer size, i.e. using fully buffered mode will result in  undefined  opera‐
       tion.

AUTHOR
       Written by Padraig Brady.

COPYRIGHT
       Copyright   ©   2013   Free   Software   Foundation,  Inc.   License  GPLv3+:  GNU  GPL  version  3  or  later
       <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the  extent  per‐
       mitted by law.