Ubuntu Unleashed 2019 Edition: Covering 18.04, 18.10, 19.04

construct: Click here to view code image while expression do statements done In tcsh, use the following forma ...

In pdksh and bash, the following format is used: Click here to view code image until expression do statem ...

The select Statement (pdksh) You use the select statement to generate a menu list if you are writing a she ...

a user can pass various options. Depending on the specified option, the parameters that follow can mean ...

fi In tcsh, the if statement has two forms. The first form, similar to the one for pdksh and bash, is as follo ...

There are two things to note in this set of operations. When you multiply, you must use an escape char ...

esac You can specify a number of discrete values—such as str1, str2, and so on—for each condition, or you can ...

You can specify a number of discrete values—such as str1, str2, and so on—for each condition, or you can speci ...

Using Functions in Shell Scripts As with other programming languages, in Ubuntu shell programs also suppo ...

Displaymonth 8 The preceding program displays the following output: Month is August References http://www.gnu.org/s ...

CHAPTER 15 The Boot Process IN THIS CHAPTER Running Services at Boot Beginning the Boot Loading Process Star ...

Running Services at Boot Although most people consider a computer to be either on or off, in Ubuntu ...

users.” —hitsujiTMO (Reddit Inc.) in https://www.reddit.com/r/Ubuntu/comments/2yeyyi/grab_your_pitchforks_ubuntu_to_switch_to_ ...

vary among manufacturers, and the diagnosis of problems occurring during this phase of the boot process i ...

NOTE Linux is very flexible and can be booted from multiple images on a CD- ROM, over a network usi ...

The init command traditionally boots a Linux system to a specific system state, commonly referred to a ...

Runlevel 6—This runlevel reboots the system. Runlevel 1 (also known as single-user mode or maintenance mode ...

about a specific number, but some services need to be running before others are started. You would not w ...

because each service might require special commands. After all the system scripts have been run, your system ...

network addresses for a networking interface). For example, in the past a system administrator could quickly ...