[root@AL-SERVER~]$ service cron status
?cron.service - Regular background program processing daemon
Loaded: loaded (/lib/systemd/system/cron.service; enabled; vendor preset: enabled)
Active: active (running) since Fri 2023-06-02 00:06:32 CST; 8h ago
Docs: man:cron(8)
Main PID: 939 (cron)
Tasks: 1 (limit: 18651)
Memory: 500.0K
CPU: 442ms
CGroup: /system.slice/cron.service
测试
crontab -e
* * * * * echo '123!'
* * * * * /bin/echo '123!'
没明白错在哪,为什么 没有执行