Linux Plus-Managing Linux Filesystem

Overview

Filesystems

• Create and manage filesystems
  • ext4
  • xfs
  • btrfs
• Mount filesystems

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1. Gain root privileges
2. Using luksOpen to decrypt the device
3. Searching “mount count”

1. Format loop1p2 partition with xfs
2. Defrag a filesystem while the system is online …

Managing EXT4 Filesystemms

• The filesystem already exists
• We can read the filesystem settings
• Configure the volume label

Managing XFS Filesystems

• Add a filesystem to the second partition
• Using the xfs toolset to read the filesystems settings
• Demonstrating the dynamic nature of XFS to defrag the existing root filesystem

Managing btrfs on openSUSE

• Install btrfs
• Add new disk files
• Add btrfs filesystem to one disk and mount it
• Checking the filesystem, and view its size
• Add another disk and check the filesystem grew while still online

Working with Mount and Unmount

• Using the mount command
• Using the umount command
• Checking the UUID using blkid
• Persisting mounts in the /etc/fstab

Summary

1. Check the size of the file (df) or directory (du)

df, du

1. mkfs - create a filesytem, such as xfs, ext4 and btrfs (option -t - to specify the type of filesystem)

   mkfs -t xfs, ext4, btrfs
   

2. • mount / umount
3. To persist any of the filesystem into the mount point edit /etc/fstab and use the UUID of the filesystem

   vi /etc/fstab
   

4. Gain information of the filesystem

   tune2fs, dumpe2fs
   

5. To defragment the filesystem

   xfs_admin, xfs_fsr, xfs_info
   

6. For Advanced filesystems settings

 btrfs #subcommand#