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Full Discussion: /dev/null 2>&1 question
Top Forums UNIX for Dummies Questions & Answers /dev/null 2>&1 question Post 35709 by BAM on Tuesday 29th of April 2003 09:14:02 AM
Old 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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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)
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