分 时 日 月 周 命令
21:44 ukleinek: Akagi201: crontab -, not crontab -e
you might want to add a filter though. My Debian's crontab manpage says: The "out-of-the-box" behaviour for crontab -l is to display the three line "DO NOT EDIT THIS FILE" header that is placed at the beginning of the crontab when it is installed. The problem is that it makes the sequence crontab -l | crontab - non-idempotent.
yunfan: of cause you can
21:51 yunfan: Akagi201: use
crontab -i which would accept stdin as the content
echo "* * * * * /xxxxx > /dev/null 2>&1" >> /var/spool/cron/root