A. df -Ik tmpB. df -fk tmpC. df -Uk tmpD. df -Fk tmpWhi……

单项选择题The man page for command shows the following syntax: The man page for command shows the following syntax: command [ -a | -b ] Which of the following statements is true regarding this entry?（）

A. Either the -a or flag -b may be used, but not both.
B. If the flag -a is used then the flag -b also must be used.
C. One of the -a or -b flags must be used, but not both at the same time.
D. Both the flags may be used together, but neither are mandatory.

单项选择题Which of the following commands can an operator use to view disk performance details?（）

A. topas -D
B. topas -R
C. topas -C
D. topas -d

单项选择题The system administrator has requested that all setuid setgid bits be removed from executables in application filesystem. Which command will achieve this?（）

A. chmod -R o-s /application
B. chmod -R ug-s /application
C. chmod -R -s -o /application
D. chmod -R -s -ug /application

单项选择题An operator is editing a file using vi. Which of the following subcommand sequences will copy the current line plus the next 2 lines to the end of the file?（）

A. yy E 3p
B. 3yy G p
C. 3yy :e 5pp
D. yy :g 3p

单项选择题How can an operator temporarily gain access to the command line while in a smit session, without losing the current smit session?（）

A. F2 key
B. F6 key
C. F8 key
D. F9 key