Re: [CentOS] run bash from cron

[m . roth]

Mark Haney wrote:
> On 11/15/2017 11:48 AM, m.r...@5-cent.us wrote:
>> Mark Haney wrote:
>>> For the record, this was the only option to handle the task I'm having
>>> issues with inside cron.
>>>
>> Yes. Do not trust your environment, running as a cron job, to be what
>> you think it is. Try testing it by have your cron job, at the top of the
>> script, issue the env command.
>>
> I'm not sure I follow, where should the env command be placed?  At the
> front of the cron line?
>
crontab -e
1 1 * * * run_my_script

Ok, I forget if you said it was perl or bash...

more run_my_script
#!/bin/bash

env



Is that clearer?

   mark





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Re: [CentOS] run bash from cron

[Mark Haney]

On 11/15/2017 11:57 AM, Paul Heinlein wrote:

In your crontab, try

  env PATH="$PATH:/root/bin" bash filename.txt

Maybe I wasn't terribly clear, for which I apologize.  I'm not running 
the text file itself from cron.  I'm running an ansible playbook from 
cron, which, as one of its tasks runs 'bash filename.txt'.  It's 
possible I could try the command you recommend above in the task and see 
if that fixes it.


However, I have another method that works in a similar fashion. I simply 
added BASH_ENV=$HOME/bash_profile to the top of my crontab, which has 
fixed the issue.  I could have sourced the profile on the cronjob line, 
but this is a bit clearer for other who might access the system.


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Re: [CentOS] run bash from cron

[Mark Haney]

On 11/15/2017 11:48 AM, m.r...@5-cent.us wrote:

Mark Haney wrote:

For the record, this was the only option to handle the task I'm having
issues with inside cron.


Yes. Do not trust your environment, running as a cron job, to be what you
think it is. Try testing it by have your cron job, at the top of the
script, issue the env command.

mark

I'm not sure I follow, where should the env command be placed?  At the 
front of the cron line?


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Mark Haney
Network Engineer at NeoNova
919-460-3330 option 1
mark.ha...@neonova.net
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Re: [CentOS] run bash from cron

[Mark Haney]

On 11/15/2017 11:55 AM, Noam Bernstein wrote:

On Nov 15, 2017, at 11:48 AM, m.r...@5-cent.us wrote:

Mark Haney wrote:

This might be a bit OT, but I've never had to do this before and what
I've googled doesn't seem to be working.

I have an ansible playbook that I'm working on that I want to run as a
cronjob.  One task I'm having trouble with is where I have a text file
with lines like:

rd.pl "blah blah"
rd.pl "blah blah blah"

This text file has to be 'executed' using 'bash filename.txt'. (Don't
ask why, I'm working on code that isn't mine.) When I run the playbook
in a console this bit works perfectly.  However, when it's being run
from cron, it dies with 'rd.pl: command not found'.  My original thought
is that cron's $PATH is missing the location to this rd.pl file (it's in
/root/bin), so one suggestion from the Google was to add the path into
/etc/crontab, but I'm still having the same problem.  At this stage,
I've no idea what to try next.  Any ideas?

For the record, this was the only option to handle the task I'm having
issues with inside cron.


Yes. Do not trust your environment, running as a cron job, to be what you
think it is. Try testing it by have your cron job, at the top of the
script, issue the env command.


What about just giving the full path to the rd.pl script in the text file (i.e. 
/root/bin/rd.pl) ?

Well, I'll be damned.  That actually worked.  In all honesty, when first 
building this playbook, giving the full path didn't work.  (I swear it 
didn't).  It's still not great, though because the out put is being 
generated without the full path. However, I think I can fix that without 
too much trouble.


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Network Engineer at NeoNova
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Re: [CentOS] run bash from cron

[Paul Heinlein]

On Wed, 15 Nov 2017, Mark Haney wrote:

This might be a bit OT, but I've never had to do this before and what I've 
googled doesn't seem to be working.


I have an ansible playbook that I'm working on that I want to run as a 
cronjob.  One task I'm having trouble with is where I have a text file with 
lines like:


rd.pl "blah blah"
rd.pl "blah blah blah"

This text file has to be 'executed' using 'bash filename.txt'. (Don't ask 
why, I'm working on code that isn't mine.) When I run the playbook in a 
console this bit works perfectly.  However, when it's being run from cron, it 
dies with 'rd.pl: command not found'.  My original thought is that cron's 
$PATH is missing the location to this rd.pl file (it's in /root/bin), so one 
suggestion from the Google was to add the path into /etc/crontab, but I'm 
still having the same problem.  At this stage, I've no idea what to try 
next.  Any ideas?


In your crontab, try

  env PATH="$PATH:/root/bin" bash filename.txt

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Re: [CentOS] run bash from cron

[Noam Bernstein]

> On Nov 15, 2017, at 11:48 AM, m.r...@5-cent.us wrote:
> 
> Mark Haney wrote:
>> This might be a bit OT, but I've never had to do this before and what
>> I've googled doesn't seem to be working.
>> 
>> I have an ansible playbook that I'm working on that I want to run as a
>> cronjob.  One task I'm having trouble with is where I have a text file
>> with lines like:
>> 
>> rd.pl "blah blah"
>> rd.pl "blah blah blah"
>> 
>> This text file has to be 'executed' using 'bash filename.txt'. (Don't
>> ask why, I'm working on code that isn't mine.) When I run the playbook
>> in a console this bit works perfectly.  However, when it's being run
>> from cron, it dies with 'rd.pl: command not found'.  My original thought
>> is that cron's $PATH is missing the location to this rd.pl file (it's in
>> /root/bin), so one suggestion from the Google was to add the path into
>> /etc/crontab, but I'm still having the same problem.  At this stage,
>> I've no idea what to try next.  Any ideas?
>> 
>> For the record, this was the only option to handle the task I'm having
>> issues with inside cron.
>> 
> Yes. Do not trust your environment, running as a cron job, to be what you
> think it is. Try testing it by have your cron job, at the top of the
> script, issue the env command.


What about just giving the full path to the rd.pl script in the text file (i.e. 
/root/bin/rd.pl) ?

Noam



||
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|_RESEARCH_|
LABORATORY
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Center for Materials Physics and Technology
U.S. Naval Research Laboratory
T +1 202 404 8628  F +1 202 404 7546
https://www.nrl.navy.mil 
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Re: [CentOS] run bash from cron

[m . roth]

Mark Haney wrote:
> This might be a bit OT, but I've never had to do this before and what
> I've googled doesn't seem to be working.
>
> I have an ansible playbook that I'm working on that I want to run as a
> cronjob.  One task I'm having trouble with is where I have a text file
> with lines like:
>
> rd.pl "blah blah"
> rd.pl "blah blah blah"
>
> This text file has to be 'executed' using 'bash filename.txt'. (Don't
> ask why, I'm working on code that isn't mine.) When I run the playbook
> in a console this bit works perfectly.  However, when it's being run
> from cron, it dies with 'rd.pl: command not found'.  My original thought
> is that cron's $PATH is missing the location to this rd.pl file (it's in
> /root/bin), so one suggestion from the Google was to add the path into
> /etc/crontab, but I'm still having the same problem.  At this stage,
> I've no idea what to try next.  Any ideas?
>
> For the record, this was the only option to handle the task I'm having
> issues with inside cron.
>
Yes. Do not trust your environment, running as a cron job, to be what you
think it is. Try testing it by have your cron job, at the top of the
script, issue the env command.

   mark

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Re: [CentOS] run bash from cron

[Frank Cox]

On Wed, 15 Nov 2017 11:29:50 -0500
Mark Haney wrote:

> This text file has to be 'executed' using 'bash filename.txt'. (Don't 
> ask why, I'm working on code that isn't mine.) 

Try adding #!/bin/bash as the first line of the text file and then run it with 
just the filename.

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[CentOS] run bash from cron

[Mark Haney]

This might be a bit OT, but I've never had to do this before and what 
I've googled doesn't seem to be working.


I have an ansible playbook that I'm working on that I want to run as a 
cronjob.  One task I'm having trouble with is where I have a text file 
with lines like:


rd.pl "blah blah"
rd.pl "blah blah blah"

This text file has to be 'executed' using 'bash filename.txt'. (Don't 
ask why, I'm working on code that isn't mine.) When I run the playbook 
in a console this bit works perfectly.  However, when it's being run 
from cron, it dies with 'rd.pl: command not found'.  My original thought 
is that cron's $PATH is missing the location to this rd.pl file (it's in 
/root/bin), so one suggestion from the Google was to add the path into 
/etc/crontab, but I'm still having the same problem.  At this stage, 
I've no idea what to try next.  Any ideas?


For the record, this was the only option to handle the task I'm having 
issues with inside cron.


--
Mark Haney
Network Engineer at NeoNova
919-460-3330 option 1
mark.ha...@neonova.net
www.neonova.net

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