Linux ch5

What does the du /var command do?

Shows the size of all directories within the /var directory

Which command is used to display the amount of free space that exists on a filesystem?

df

What does the command dumpe2fs -h do?

displays the number of inodes used and available in an ext2 filesystem

Which command is used to format a partition on a hard disk drive with the ext4 filesystem?

mke2fs -t ext4 device

The first floppy drive on the system is not responding. You enter the file /dev/fd0 command and receive the following output. What is the problem? [root@server1 root]# file /dev/fd0 /dev/fd0: ASCII text

the device file has become corrupt

What must you do to successfully run the fsck command on a filesystem?

umount the filesystem

You plug a USB flash memory drive into a system that has two SATA hard disks. How will the partition on this USB flash memory drive be identified by Linux?

/dev/sdc1

A user runs the fsck command with the -a option on a filesystem that is showing signs of corruption. How would that user locate any files the system was unable to repair?

Mount the filesystem and check the lost+found directory underneath the mount point

Given the following output from /etc/fstab, which filesystems will be automatically checked on boot by the fsck command? /dev/sda1 / ext4 defaults 1 1 none /dev/pts devpts gid=5,mode=620 1 0 none /proc proc defaults 0 1 none /dev/shm tmpfs defaults 1 0 /dev/sdc2 swap swap defaults 0 1 /dev/dvd /media/dvd iso9660 noauto,ro 0 0 /dev/fd0 /media/floppy auto noauto 0 0

/, /proc, and swap

After a partition on a hard disk drive is formatted with a filesystem, all partitions on that hard disk drive must use the same filesystem.

False

Character devices typically transfer data more quickly than block devices.

False

A device file ______.

Has no data section displays a major and minor number in place of a file size

Which of the following statements are true? (Choose all that apply.) a. Quotas can only limit user space. b. Quotas can only limit the number of files a user can own. c. Quotas can limit both user space and the number of files a user can own. d. Hard limits can never be exceeded. e. Hard limits allow a user to exceed them for a certain period of time. f. Soft limits can never be exceeded. g. Soft limits allow a user to exceed them for a certain period of time. h. Either a hard limit or a soft limit can be set, but not both concurrently.

Quotas can limit both user space and the number of files a user can own. Hard limits can never be exceeded. Soft limits allow a user to exceed them for a certain period of time.

The lvextend command can be used to add additional unused space within a volume group to an existing logical volume.

True

A user mounts a device to a mount point directory and realizes afterward that there are files previously found within the mount point directory that are needed. What would this user do?

Unmount the device from the directory

You find that a device file in the /dev directory has become corrupted. You know that this device is /dev/tty3 and that it is a character device file. What should you do?

Use the /dev/MAKEDEV command to re-create the file

Jim has just purchased two new SCSI hard disk drives and a controller card for them. He properly installs the hardware in his machine. Before he can use them for data storage and retrieval, what must he do?

Use the fdisk command to create one or more partitions on each of the hard disk drives mount any partitions created on the two hard drives so that they are accessible by the operating system Format any partitions created with a valid filesystem recognized by Linux

Which of the following statements regarding LVM structure is correct?

VGs are composed of one or more PVs

You want to see the filesystems that are presently in use on the system. What command could you use?

cat /etc/mtab

Which command mounts all existing filesystems in /etc/fstab?

mount -a