Cron does not execute commands after upgrade to 21.02 (Linksys 860l)

Installing and Using OpenWrt
1

Hi,
I get only error outputs and cronjobs do not run at all. Everything was working fine before the upgrade from openwrt 19.7.6

Here are some of the errors from logread:

Fri Oct 15 14:20:13 2021 daemon.warn procd: Seccomp support for cron::instance1 not available
Fri Oct 15 14:20:13 2021 cron.err crond[3809]: crond (busybox 1.33.1) started, log level 5
Fri Oct 15 14:23:27 2021 cron.err crond[3973]: crond (busybox 1.33.1) started, log level 5
Fri Oct 15 14:24:00 2021 cron.err crond[3973]: USER root pid 3999 cmd !/usr/bin/env bash echo "hello world"
Fri Oct 15 14:25:00 2021 cron.err crond[3973]: USER root pid 4005 cmd !/usr/bin/env bash echo "hello world"
Fri Oct 15 14:26:00 2021 cron.err crond[3973]: USER root pid 4010 cmd !/usr/bin/env bash echo "hello world"
Fri Oct 15 14:27:00 2021 cron.err crond[3973]: USER root pid 4014 cmd !/usr/bin/env bash echo "hello world"
Fri Oct 15 14:28:00 2021 cron.err crond[3973]: USER root pid 4036 cmd !/usr/bin/env bash echo "hello world"
Fri Oct 15 14:29:00 2021 cron.err crond[3973]: USER root pid 4067 cmd !/usr/bin/env bash echo "hello world"
Fri Oct 15 14:30:11 2021 cron.err crond[4149]: crond (busybox 1.33.1) started, log level 5```


I copied over an old user config file to regain user permissions for samba/transmission etc. on openwrt 21.02.
Maybe I accidentally changed some user permissions for cron? Might that be the problem here?
2

The problem might be that you explicitly require bash shell, and it is not installed by default.

Use the normal sh shebang, or install the non-standard bash shell. (Do you really need bash features)

Or have you actually installed bash after the sysupgrade?

1 Like
3

The "Hello world" bash thing was just a placeholder. I tested it with etherwake/wifi sheduler commands beforehand and none worked. I copy/pasted my old crontab after the upgrade. All these tabs have worked on openwrt 18.6. I am sure it's not a problem with the commands, but with cron itself.

4