Linux-Basics-Complete-Course-With-Notes-Slides

File System in Linux

• In this lecture we will cover the most commonly used file systems from EXT2 to EXT4.

  

#### Working with Ext4

• To create a file system we will make use of /dev/sdb disk, run below command

  [~]$ mkfs.ext4 /dev/sdb1
  

• Now create a directory to mount the filesystem use below commands

  [~]$ mkdir /mnt/ext4;
  
  [~]$ mount /dev/sdb1 /mnt/ext4
  

• To verify if the filesystem is mounted use

  [~]$ mount | grep /dev/sdb1
  
  [~]$ df -hP | grep /dev/sdb1
  

• Add an entry into /etc/fstab for the filesystem to be available after reboot.

  # /etc/fstab: static file system information.
  #
  # Use 'blkid' to print the universally unique identifier for a
  # device; this may be used with UUID= as a more robust way to name devices
  # that works even if disks are added and removed. See fstab(5).
  #
  # <file system> <mount point> <type> <options> <dump> <pass>
  /dev/sda1 / ext4 defaults,relatime,errors=panic 0 1 ~
  

  echo "/dev/sdb1 /mnt/ext4 ext4 rw 0 0" >> /etc/fstab
  

• fstab file attributes