Book Image

Learn Linux Quickly

By : Ahmed AlKabary
Book Image

Learn Linux Quickly

By: Ahmed AlKabary

Overview of this book

Linux is one of the most sought-after skills in the IT industry, with jobs involving Linux being increasingly in demand. Linux is by far the most popular operating system deployed in both public and private clouds; it is the processing power behind the majority of IoT and embedded devices. Do you use a mobile device that runs on Android? Even Android is a Linux distribution. This Linux book is a practical guide that lets you explore the power of the Linux command-line interface. Starting with the history of Linux, you'll quickly progress to the Linux filesystem hierarchy and learn a variety of basic Linux commands. You'll then understand how to make use of the extensive Linux documentation and help tools. The book shows you how to manage users and groups and takes you through the process of installing and managing software on Linux systems. As you advance, you'll discover how you can interact with Linux processes and troubleshoot network problems before learning the art of writing bash scripts and automating administrative tasks with Cron jobs. In addition to this, you'll get to create your own Linux commands and analyze various disk management techniques. By the end of this book, you'll have gained the Linux skills required to become an efficient Linux system administrator and be able to manage and work productively on Linux systems.
Table of Contents (24 chapters)

Permanently mounting filesystems

The mount command only mounts a filesystem temporarily; that is, filesystems mounted with the mount command won't survive a system reboot. If you want to mount a filesystem permanently, then you need to include it in the filesystem table file /etc/fstab.

Each entry (or line) in /etc/fstab represents a different filesystem, and each line consists of the following six fields:

  • filesystem
  • mount_dir
  • fstype
  • mount_options
  • dump
  • check_fs

So, for example, to mount our /dev/sdb1 filesystem on /games permanently, you need to include the following line in /etc/fstab:

/dev/sdb1 /games ext4 defaults 0 0

You should add the line to the end of the /etc/fstab file:

root@ubuntu-linux:~# tail -1 /etc/fstab
/dev/sdb1 /games ext4 defaults 0 0

Now let's unmount /dev/sdb1:

root@ubuntu-linux:~# umount /dev/sdb1

Finally, you can now mount /dev/sdb1 permanently by running:

root@ubuntu-linux:~# mount /dev/sdb1

Notice we did not specify a mount destination this time...