Crontab-sh：找不到ip命令

Question

I have a php script that can successfully get the results of this command.

exec("ip addr list",$results);

if I run it on command line using

/usr/bin/php /root/myscript.php

but when crontab will make it run, it will result to sh: ip command not found. i also tried

exec("/sbin/ip addr list",$results);

but still no luck

Any help would be greatly appreciated.

Answer 1

Add a log to your cronjob to see what might go wrong, eg;

# m h  dom mon dow   command
14 9 1 8 * /usr/bin/php /home/user/test.php >> /home/user/test.log 2>&1

Below code got executed successfully with a cronjob;

<?php
$ret = exec("/sbin/ip addr list", $out, $err);
$file = '/home/user/output.log';
file_put_contents($file, $out);
?>