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單項(xiàng)選擇題

A System p administrator is attempting to restore some files from a backup tape. The restore failed. The system administrator suspects the block size of the tape drive is incorrect.
Which of the following commands can be used to determine the block size of the backup tape （）

A.dd
B.tar
C.cpio
D.restore

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單項(xiàng)選擇題
During system boot， the boot process hangs at LED 0551.
Which of the following is a likely cause（）
A.A network problem
B.corrupted filesystem
C.corrupted ODM
D.corrupted /etc/inittab file
單項(xiàng)選擇題
Which cron entry will run /usr/local/bin/myscript at 0500 every Saturday（）
A.5 0 * * 6 /usr/local/bin/myscript
B.6 * * 5 0 /usr/local/bin/myscript
C.0 5 * * 6 /usr/local/bin/myscript
D.0 5 6 * * /usr/local/bin/myscript

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