cannot access /var/spool/cron/crontabs: Permission denied

[mister_v]

I can not edit my cronfile anymore.

I get the following error message.

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cannot access /var/spool/cron/crontabs: Permission denied

As root it is possible.

[chris]

There can be several reasons:

check that the group crontab has all the necessary rights

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chown root:crontab /usr/bin/crontab
chmod g+s /usr/bin/crontab

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chown root:crontab /var/spool/cron/crontabs
chmod u=rwx,g=wx,o=t /var/spool/cron/crontabs

[mister_v]

Thanks.

I found the problem:
The usergroup of /var/spool/cron
was set to cron instead of crontab.

I don't know how this happened?
Perhaps with and update of cron?