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單項(xiàng)選擇題

How should read， write and execute permissions for ‘group’ and ‘other’ be granted to all files and directories within the /app filesystem？（）

A.chmod -R 677 /app
B.chmod -R 664 /app
C.chmod -r 677 /app
D.chmod -r 664 /app

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單項(xiàng)選擇題

Which command will display the current control key settings？（）

A.‘tty -l’
B.‘stty -a’
C.‘lstty -a’
D.‘terminfo -l’

單項(xiàng)選擇題

Which command will change the user webserver’s shell to ksh93？（）

A.chshell -ksh93 webserver
B.chsh webserver /usr/bin/ksh93
C.chuser -a shell=/usr/bin/ksh93 webserver
D.setuid -a SHELL=/usr/bin/ksh93 -u webserver

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