The whole point

Like I said earlier, the purpose is to make your life easier. Now that we have gotten past the unfortunate parts that you need to know in order to use these tools, we can dive into some of the benefits you will receive.

Fast Configuration

Using other computers is a pain because you have gotten used to your own, right? No one has their environment setup quite like yours.
Can be solved with a package manager such as Homebrew (for macs) or apt-get (for debian based linux distros, ie. Ubuntu)
ex. there is a better command for grep called ack. How easy is it to install? If you have homebrew brew install ack or with apt-get sudo apt-get install ack-grep.
Thats pretty cool but it would be a pain to remember them all and execute them everytime you wanted to set up a new workstation. Solution? write a bash script. Better solution? edit your bashrc (linux) or bash_profile (Mac) file

Allows you to customize your shell experience. I posted the one I use on my Mac on the github. Feel free to use it and expand on it.
Your bash profile or rc is a hidden file in your home (~) directory

crtl- a beginning of the line crtl-e end of the line
!<command> redo last use of the command, !! do last command again
echo $? prints whether the last command was successful 0 or the error code
Exit a process crtl-c, kill a process kill -15 <pid>
curl
history, arrow up and down history
You can take the output of a process and use it as the input of another |
- ex. history | grep ssh
write to file >
read from file <