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1.When an ext2 partition is formatted, a fixed percentage of the blocks on the disk are reserved for use by the root user. After the file system has been created this percentage can be modified using which utility?

tune2fs
mke2fs
e2fsck
mount
hdparm

Explanation: The tune2fs utility can be used to modify the reserved blocks. For example, the tune2fs - u <username> command can be used to allow a user to use the reserved blocks.

Reference: http://www.oreillynet.com/linux/cmd/t/tune2fs.html

Incorrect Answers:
B: You need the tune2fs utility, not mke2fs.
C: E2fsck is used to check a disk for bad blocks. It is not used for reserved blocks.
D: The mount command is used to mount a file system. It is not used for reserved blocks.
E: Hdparm is used for tuning a hard disk for performance. It is not used for reserved blocks.

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