单项选择题

Which command restarts the TCP/IP subsystem？（）

A.refresh -s inetd
B.refresh -s tcpip
C.refresh -g /etc/rc.tcpip
D.refresh -g /etc/inetd.conf

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单项选择题

How would a system administrator review root’s current cron jobs of the following？（）

A.crontab -l
B.cron -l root
C.lscron -l root
D.cat /var/cron/crontabs/root

单项选择题

Which cron entry will run /usr/local/bin/myscript at 0500 every Saturday of the following？（）

A.0 5 * * 6 /usr/local/bin/myscript
B.0 5 6 * * /usr/local/bin/myscript
C.6 * * 5 0 /usr/local/bin/myscript
D.5 0 Sat * * /usr/local/bin/myscript

单项选择题

A system administrator wants to run a script called myscript， but does not want to see the errors that might be generated by the script. How would this be accomplished？（）

A./usr/local/bin/myscript > /dev/null
B./usr/local/bin/myscript < /dev/null
C./usr/local/bin/myscript 2> /dev/null
D./usr/local/bin/myscript 1> /dev/null