04-29-2003
/dev/null 2>&1 question
Hi,
suppose you have the following line at your crontab :
5 * * * * /usr/mine/script > /dev/null 2>&1
now i understood that the " > /dev/null 2>&1 outputs both Standard outpout and Standard Error messages to the /dev/null device or file...
the first part , " > /dev/null " transfers the stdout messages to the /dev/null, but i am missing the part where the stderr is also dumped at dev/null.....
2(is stderr) >(send) &1 (stdout)...
i am not understanding how you send stdout first to dev/null and then send stderr to stdout which in turn will be sent to dev/null too ???
Thanks.
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LEARN ABOUT DEBIAN
solarpowerlog
SOLARPOWERLOG(1) SOLARPOWERLOG(1)
NAME
solarpowerlog - queries data from a photovoltaic inverter
SYNOPSIS
solarpowerlog [options]
DESCRIPTION
The program trackd and logd data from photovoltaic inverters, collect power data and store them.
OPTIONS
The program follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included
below.
-h, --help
Show summary of options.
-v, --version
Show version of program.
-b, --background
Runs the program in the background, detaching it from the console.
-c, --conf filename
The configuration to be used. Default is solarpowerlog.conf, looked for in the current directory.
--dumpcfg
Dump configuration structure, then exit
--chdir arg
working directory for daemon (only used when running as a daemon). Defaults to /
--stdout arg
redirect stdout to this file (only used when running as a daemon). Defaults to /dev/null
--stderr arg
redirect stderr to this file (only used when running as a daemon). Defaults to /dev/null
--pidfile arg
create a pidfile after the daemon has been started. (only used when running as a daemon). Default: no pid file
SEE ALSO
http://sourceforge.net/apps/mediawiki/solarpowerlog/index.php
June 16, 2009 SOLARPOWERLOG(1)