这是在我正在尝试运行的 Raspberry pi 3b 上运行的:
*/1 * * * * date > /dev/tty1
我得到:
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 Sun 2020-02-23 01:31:53 EST; 32min ago
Docs: man:cron(8)
Main PID: 396 (cron)
Tasks: 1 (limit: 1170)
Memory: 1.5M
CGroup: /system.slice/cron.service
└─396 /usr/sbin/cron -f
Feb 23 02:02:01 pi002 CRON[2185]: (CRON) info (No MTA installed, discarding output)
Feb 23 02:02:01 pi002 CRON[2185]: pam_unix(cron:session): session closed for user pi
Feb 23 02:02:01 pi002 CRON[2186]: pam_unix(cron:session): session closed for user pi
Feb 23 02:03:01 pi002 CRON[2221]: pam_unix(cron:session): session opened for user pi by (uid=0)
Feb 23 02:03:01 pi002 CRON[2222]: pam_unix(cron:session): session opened for user pi by (uid=0)
Feb 23 02:03:01 pi002 CRON[2229]: (pi) CMD (echo "2 minutes later...")
Feb 23 02:03:01 pi002 CRON[2230]: (pi) CMD (date > /dev/tty1)
Feb 23 02:03:01 pi002 CRON[2221]: (CRON) info (No MTA installed, discarding output)
Feb 23 02:03:01 pi002 CRON[2221]: pam_unix(cron:session): session closed for user pi
Feb 23 02:03:01 pi002 CRON[2222]: pam_unix(cron:session): session closed for user pi