A. export PATH=pwdB. export PATH=$PWDC. export PATH=$PA……

单项选择题Which of the following commands can be used to show all disks configured on the system?（）

A. lsdev -C disk
B. lsdev -P disk
C. lsdev -Cc disk
D. lsdev -Pc disk

单项选择题An operator needs to create dir1 dir2 dir3. The dir1 does not exist. What command can be used to create dir2 and dir3?（）

A. mkdir /dir1/dir2/dir3
B. mkdir -R dir1/dir2/dir3
C. mkdir -p /dir1/dir2/dir3
D. mkdir -r /dir1/dir2/dir3

单项选择题How can an operator list all its history of commands in one step?（）

A. Run c -l 0?from the command line.Run ?c -l 0?from the command line.
B. Invoke SMIT for the shell environment.
C. Run the SC + H?combination at the command prompt.Run the ?SC + H?combination at the command prompt.
D. Use a rep?command with its UID against the /var/log/history_cmds file.Use a ?rep?command with its UID against the /var/log/history_cmds file.

单项选择题An operator is asked to shutdown the telnet service for security reasons. What are the appropriate commands to achieve this?（）

A. comment out telnetd in /etc/services refresh -s inetd
B. comment out telnetd in /etc/inetd.conf refresh -s inetd
C. comment out telnetd in /etc/rc.tcpip refresh -s telnetd
D. comment out telnetd in /etc/inetd.conf refresh -s telnetd

单项选择题What command can be used to make all mountable filesystems available for use?（）

A. mount -a
B. automount all
C. varyonvg -m -a
D. run the /etc/filesystems script