I always had problems with crontab.
Long ago, I used to believed that it was stored somewhere in /etc/ and expected to get it back after a system restore … Well I learned that it lives in /var/spool/cron ! I was young (and it was at home.)
But recently, something more tricky happened : I tried to use file_name`date “+%Y%m%d”`.txt Seems OK? but it isn’t !
cron interpreted % as a special meaning : new line ! You have to escape it \% ! Like this file_name$(date +\%Y\%m\%d).txt !
Would it be difficult to issue a warning in case of % after editing the cron ??