问题
jack@somemachine /data/jack $ crontab -e
crontabs/jack: Permission denied
解决办法
sudo chown root:crontab /var/spool/cron/crontabs/jack@somemachine /data/jack $ crontab -e
crontabs/jack: Permission denied
sudo chown root:crontab /var/spool/cron/crontabs/