File wang.tar.gz in the current directory. The correct tar command to extract this file is:
A. tar zcvf wang.tar.gz
B. tar zxvf wang.tar.gz
C. tar jcvf wang.tar.gz
D. tar jxvf wang.tar.gz
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Which technique is used in the command‘ls -l >tmp’
A. Input redirection
B. Output redirection
C. Pipe
D. Batch
Which command can be used to reboot the system
A. init 0
B. init 6
C. init 3
D. init 5
Executing a command at the background should follow a symbol:
A. &
B. $
C. @
D.
Which command can be used to mount 'Windows C: disk (hda1)' in the /winsys directory:
A.
B. mount dev/hda1 /winsys
C. B.
D. mount /dev/hda1 /winsys
E. C.
F. mount winsys /dev/hda1
G. D.
H. mount /winsys /dev/hda1
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