Gain insights into the intricacies of the Bash shell, ideal for beginners. Delve into essential skills with interactive learning designed to ensure lasting knowledge without requiring prior experience.

dockerbash.tar.gz

tset

A course for anyone interested in understanding all aspects of the bash shell. Designed for use by beginners, it assumes as little knowledge as possible but teaches you all the intricacies of bash it took me decades to learn by trial and error. 

The interactive nature of the course instills the knowledge in a way you will not forget!

Master the Bash Shell

### How Important is this Lesson?

You can easily skip this lesson if you want as nothing here is new, but
following this can embed some concepts and keep your motivation going before
the final part!

### Output With Time

Frequently, I want to get the output of a command along with the time. Let’s
say I’m running vmstat while a server is having problems, and I want to ensure
that I’ve logged the time that vmstat relates to. Type this in:

function dateit() {
    while read line
    do
        echo "$line $(date '+ %m-%d-%Y %H:%M:%S')"
    done
}
vmstat 1 | dateit

> Note: `vmstat` is a program available on most Linux flavours that gives you a view of what the system resource usage looks like. It is not available on Mac OSes. If vmstat does not exist for you, then replace with `vm_stat`, which should be available.

You should be able to follow what's happening there based on what you've learned so far in

- [Functions](https://www.educative.io/courses/master-the-bash-shell/functions)

- [Loops](https://www.educative.io/courses/master-the-bash-shell/loops)

- [Command Substitution](https://www.educative.io/courses/master-the-bash-shell/command-substitution/draft)

- [Pipes and Redirects](https://www.educative.io/courses/master-the-bash-shell/pipes-and-redirects/draft)


The one exception is the `while read line` line. `read` is a shell builtin that takes input from
standard input until a newline is seen (or an 'end of file' byte on its own line).

# How Important is this Lesson?

You can easily skip this lesson if you want as nothing here is new, but
following this can embed some concepts and keep your motivation going before
the final part!

# Output With Time

Frequently, I want to get the output of a command along with the time. Let’s
say I’m running vmstat while a server is having problems, and I want to ensure
that I’ve logged the time that vmstat relates to. Type this in:

In this lesson, you’re going to see many of the ideas you’ve learned put together in more realistic contexts, so you can get a flavour for what bash can do for you on a day-to-day basis.

Core Bash

Scripting Bash

Bash in Practice

Advanced Bash

Putting It Together - Some Useful Examples

How Important is this Lesson?

Output With Time