What is the 'working directory' when cron executes a job?
I have a script that works when I run it from the command line, but when I schedule it with
cronI get errors that it cannot find files or commands. My question is twofold:
When I schedule a cron job using
crontab -e, does it use my user ID as the basis for its permissions? Or does it use a cron user ID of some sort and its related permissions?
When a cron job is launched, what is the working directory? Is it the directory where I specify the script to run, or a different directory?
Here is my cron job:
15 7 * * * /home/xxxx/Documents/Scripts/email_ip_script.sh
Here is the actual script:
vIP_ADDR="`curl automation.whatismyip.com/n09230945.asp`" echo "$vIP_ADDR" sed "s/IPADDR/$vIP_ADDR/g" template.txt > emailmsg.txt ssmtp [email protected] < emailmsg.txt
Here are the errors I get when I view the
sed: can't read template.txt: No such file or directory /home/xxxx/Documents/Scripts/email_ip_script.sh: line 15: ssmtp: command not found
It cannot find the
template.txtbut it resides in the same directory as the script. It also cannot run
ssmtp, but I can as my user. What am I missing to get this to work properly?
cd /home/xxxx/Documents/Scripts/if you want your job to run in that directory. There's no reason why cron would change to that particular directory. Cron runs your commands in your home directory.
ssmtp, it might not be in your default
PATH. Cron's default path is implementation-dependent, so check your man page, but in all likelihood
/usr/sbinwhich is not in your default
PATH, only root's.
PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin 15 7 * * * cd /home/xxxx/Documents/Scripts && ./email_ip_script.sh
@Giles - Thanks, would `cron` have it's own `PATH` or can I check my user's `PATH`? I set ssmtp up to have it's own `user` and `wheel` permission thinking it would allow anyone to use it (including cron). If it helps Im on CENTOS 6.2
@ProfessionalAmateur Your problem isn't that you aren't allowed to use `ssmtp`, but that your cron job doesn't find any executable called `ssmtp` because it's not in your `PATH`. There's no such thing as “your user's `PATH`”; this is a per-process setting, not a per-user setting. You can set the path for all your cron jobs by putting a `PATH=…` line in your crontab.
I had to add MAILTO='[email protected]' as well to get it working along with PATH setup. Wierd but it worked for me.