Software :: Crontab Script Execution - Different Behavior User-cronfile <-> System-wide Cronfile

Script iptables_reset.sh

Code:

#!/bin/bash
IPTABLES="$(which iptables)"
$IPTABLES -P INPUT ACCEPT
$IPTABLES -P FORWARD ACCEPT

[code]....

This works if I edit the system-wide crontab in /etc/crontab like this:

Code:

0 12 * * * root /root/iptables/iptables_reset.sh

But it won't work, if i edit roots user-cronfile by using crontab(1):

Code:

crontab -l
# m h dom mon dow command
0 12 * * * /root/iptables/iptables_reset.sh

The log entry is the same for system-wide and user-cronfile:

Code:

/USR/SBIN/CRON[5135]: (root) CMD (/root/iptables/iptables_reset.sh)

I tried different things and found out,if i don't use the "$(which iptables)"substitution in the script, it also works with the user-cronfile.