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Full Discussion: Crontab variable...
Top Forums UNIX for Dummies Questions & Answers Crontab variable... Post 302085462 by giannicello on Thursday 17th of August 2006 10:37:48 AM
Old 08-17-2006
Crontab variable...

AIX,

Why does this work:
0 8 * * * export TEST=mytest;echo "Hello" > $HOME/$TEST.log 2>&1

But not this (or any variations thereof):

0 8 * * * export LOGFILE=$(date +%Y%m%d);echo "Hello" > $HOME/$LOGFILE.log 2>&1

Is it possible to set variables this way in cron?? It will work also if like this:

0 8 * * * ksh somefile.ksh;echo "Hello" > $HOME/$LOGFILE.log 2>&1

where somefile.ksh has "export LOGFILE=`date +%Y%m%d`" but I don't want to do it this way. I want to chain the commands in cron.

Gianni

Last edited by giannicello; 08-17-2006 at 11:47 AM..
 

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echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.11 3 Aug 1994 echo(1B)
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