GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages
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
--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/>

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 operation.

Written by Padraig Brady.

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 permitted by law.

The full documentation for stdbuf is maintained as a Texinfo manual. If the info and stdbuf programs are properly installed at your site, the command
info coreutils 'stdbuf invocation'

should give you access to the complete manual.

November 2020 GNU coreutils 8.22

Search for    or go to Top of page |  Section 1 |  Main Index

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with ManDoc.