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)

Compressing with bzip2

bzip2 is another popular compression method used on Linux. On average, bzip2 is slower than gzip; however, bzip2 does a better job of compressing files to smaller sizes.

You can compress an archive with bzip2 compression by using the -j option with the tar command as follows:

tar -cjf compressed_archive archive_name

Notice the only difference here is that we use the -j option for bzip2 compression instead of -z for gzip compression.

So to compress the scripts.tar archive into a bzip2-compressed archive named scripts.tar.bz2, you first need to change to the /root/backup directory and then run the following command:

root@ubuntu-linux:~/backup# tar -cjf scripts.tar.bz2 scripts.tar

Now if you list the contents of the backup directory, you will see the newly created bzip2-compressed archive scripts.tar.bz2:

root@ubuntu-linux:~/backup# ls
scripts.tar scripts.tar.bz2 scripts.tar.gz

Let's run the file command on the bzip2-compressed archive scripts.tar.bz2:

root@ubuntu...