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STDBUF(1)                        User Commands                       STDBUF(1)

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

       stdbuf OPTION... COMMAND

       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

              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.

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

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

       Written by Padraig Brady.

       Report stdbuf bugs to
       GNU coreutils home page: <>;
       General help using GNU software: <>;
       Report stdbuf translation bugs to <>;

       Copyright  (C)  2010  Free  Software  Foundation,  Inc.   License  GPLv3+:   GNU   GPL   version   3   or   later
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permit-
       ted by law.

       The full documentation for stdbuf is maintained as a Texinfo manual.  If the info and stdbuf programs are prop-
       erly installed at your site, the command

              info coreutils 'stdbuf invocation'

       should give you access to the complete manual.

GNU coreutils 8.4                 March 2017                         STDBUF(1)