LPI Linux Certification/Maintaining A Linux File System

From Wikibooks, open books for an open world
Jump to navigation Jump to search

Detailed Objective[edit]

Weight: 4

Candidates should be able to properly maintain a Linux filesystem using system utilities. This objective includes manipulating standard filesystems.

  • Key knowledge area(s):
    • Tools and utilities to manipulate and ext2 and ext3
    • Tools and utilities to manipulate reiserfs (V3 and V4)
  • The following is a partial list of the used files, terms and utilities:
    • fsck (fsck.ext2, fsck.reiserfs)
    • badblocks
    • mkfs (mkfs.ext2, mkfs.reiserfs)
    • dumpe2fs
    • debugfs, debugreiserfs
    • tune2fs, reiserfstune

Formatting a partition[edit]

Before you format a partition you need to choose the right filesystem for your needs. The most common filesystem on linux is ext3 which is a journaled filesystem based on ext2. To format a partition with a filesystem you need to use the mkfs.* commands

 mkfs.ext3 /dev/hda1
 mkfs.vfat /dev/hda1
 mkfs.xfs /dev/hda1
 mkfs.reiserfs /dev/hda1

to create an ext2/ext3 filesystem you can also use the mke2fs utility

mke2fs /dev/hda1
mke2fs -j /dev/hda1

Configuring and repair filesystem[edit]

tune2fs it's an utility used to tune ext2/ext3 filesystem

#add the journal to an ext2 filesystem(convert from ext2 to ext3)
tune2fs -j /dev/hda1
#set the max mount count before the filesystem is checked for errors to 30
tune2fs -c 30 /dev/hda1 
#set the max time before the filesystem is checked for errors to 10 days
tune2fs -i 10d /dev/hda1

you can also tune a reiserfs partition using reiserfstune

#create a new journal for /dev/hda1 into /dev/hda2 
reiserfstune --journal-new-device /dev/hda2 -f /dev/hda1

to check a filesystem for errors you can use fsck.*

 fsck.ext3 /dev/hda1
 fsck.vfat /dev/hda1
 fsck.xfs /dev/hda1
 fsck.reiserfs /dev/hda1

you can also just run fsck /dev/hda1 directly and it will detect the filesystem