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Home > Archive > Unix administration > January 2007 > Why I can not print out $HOST inside cron job
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Why I can not print out $HOST inside cron job
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| linq936@hotmail.com 2007-01-06, 8:01 pm |
| Hi,
I set up my crontab like this,
USER=linq
USERNAME=linq
HOME=/home/linq
UID=linq
00 16 * * * source /home/linq/start.sh > /home/linq/start.log 2>&1
And the first 3 lines of ~/start.sh are,
echo HOST is $HOST
echo
echo
But when I check out ~/start.log, it has these on the top:
HOST is
If I run command, "echo $HOST", I do see it works.
Any suggestion why it is like this?
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| Bit Twister 2007-01-06, 8:01 pm |
| On 2 Jan 2007 08:56:04 -0800, linq936@hotmail.com wrote:
> Any suggestion why it is like this?
Cron jobs do not run through the same setup as logins.
in your cron job try
HOST=$((hostname))
above your echo statement.
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| linq936@hotmail.com 2007-01-06, 8:01 pm |
|
Bit Twister wrote:
> On 2 Jan 2007 08:56:04 -0800, linq936@hotmail.com wrote:
>
>
> Cron jobs do not run through the same setup as logins.
>
> in your cron job try
>
> HOST=$((hostname))
>
> above your echo statement.
Thanks for your suggestion, but here is what I see:
I have the following on the top of the BASH script which is called in
cron job:
HOST=$((hostname))
echo HOST is $HOST
echo hostname is $hostname
echo
But what I see is,
HOST is 0
hostname is
Any suggestion?
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| Erik Max Francis 2007-01-06, 8:01 pm |
| linq936@hotmail.com wrote:
> I have the following on the top of the BASH script which is called in
> cron job:
> HOST=$((hostname))
> echo HOST is $HOST
> echo hostname is $hostname
> echo
>
> But what I see is,
> HOST is 0
> hostname is
He meant
HOST=$(hostname)
or, more portably,
HOST=`hostname`
hostname is a command, the above statements assign its output to the
environment variable HOST, which is what you want. Your printing of
$hostname is meaningless.
--
Erik Max Francis && max@alcyone.com && http://www.alcyone.com/max/
San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
They have rights who dare defend them.
-- Roger Baldwin
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| Kenan Kalajdzic 2007-01-06, 8:01 pm |
| linq936@hotmail.com wrote:
>
> Bit Twister wrote:
>
> Thanks for your suggestion, but here is what I see:
>
> I have the following on the top of the BASH script which is called in
> cron job:
> HOST=$((hostname))
The above line should be:
HOST=$(hostname)
> echo HOST is $HOST
> echo hostname is $hostname
> echo
>
> ...
>
--
Kenan Kalajdzic
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