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)

One alias for multiple commands

You can use a semicolon to run multiple commands on the same line. For example, to create a new directory named newdir and change to newdir all at once, you can run the following command:

elliot@ubuntu-linux:~$ mkdir newdir; cd newdir 
elliot@ubuntu-linux:~/newdir$

So you use a semicolon to separate each command. In general, the syntax for running multiple commands on the same line is as follows:

command1; command2; command3; command4; ....

We often like to check the calendar and the date at the same time, right? For that, we will create an alias named date so that every time we run date, it will run both the date and calendar commands:

elliot@ubuntu-linux:~$ alias date="date;cal"

Now let's run date and see what's up:

Notice here that we used the alias name date, which is already the name of an existing command; this is completely fine with aliases.