A.Every user may have their own crontab.

B.A cron daemon must run for each existing crontab.

C.Changing a crontab requires a reload/restart of the cron daemon.

D.The cron daemon reloads crontab files automatically when necessary.

E.hourly is the same as "0 * * * *".

A.It would be passed to the router 192.168.1.1 on eth0.

B.It would be passed to the default router 255.255.255.0 on eth0.

C.It would be passed to the default router 192.168.178.1 on wlan0.

D.It would be directly transmitted on the device eth0.

E.It would be directly transmitted on the device wlan0.

A./etc/profile

B./etc/bashrc

C.~/.bash_profile

D./etc/.bashrc

E./etc/shellenv