Practice in Termanial

Bash Command Line Tutorials

A command line, or terminal, is a text based interface to the system. You are able to enter commands by typing them on the keyboard and feedback will be given to you similarly as text
The command line typically presents you with a prompt. As you type, it will be displayed after the prompt. Most of the time you will be issuing commands
Options are usually listed before other arguments and typically start with a dash ( - )
(for me) If you’re on a Mac then you’ll find the program Terminal under Applications -> Utilities. An easy way to get to it is the key combination ‘command + space’ which will bring up Spotlight, then start typing Terminal and it will soon show up.
shell-part of the operating system that defines how the terminal will behave and looks after running (or executing) commands for you
bash- most common shell which stands for, ‘Bourne Again Shell’
Shortcuts-entered commands are stored in your history. using the up and down keys you can select from your history, you can also edit by using the left/right keys to move the cursor.

PWD-(pwd) Print Working directory, shows current working directory
LS-(ls) short for list, shows whats in the directory
(-l) long listing
(-) normal file (d) directory
(/etc) tells (ls) not to list current directory but to list that directory’s contents
2 types of paths: absolute-A file or directory location relative to where we currently are in the file system and relative-A file or directory location in relation to the root of the file system
(tidle) shortcut to home directory
(dot) reference to current directory
(dotdot) reference to parent directory
Tab completion auto complete action

manual pages are a set of pages that explain every command available on your system including what they do, the specifics of how you run them and what command line arguments they accept
invoke command by : man <command to look up>
search withing manual pages by : man -k<search term>
list all directory entries (including hidden files) we can use the option -a or --all

to make a directory mkdir [options] <Directory>
examples of options to make a directory mkdir /home/ryan/foo mkdir ./blah mkdir ../dir1 mkdir ~/linuxtutorialwork/dir2
-p which tells mkdir to make parent directories as needed
-v which makes mkdir tell us what it is doing
remove directory rmdir [options] <Directory>
creating a blank file touch [options] <filename>
to copy file or directory cp [options] <source> <destination>
move file or directory mv [options] <source> <destination>
rename file or directory: specify the destination to be the same directory as the source, but with a different name using the mv option
remove file and non empty directory rm [options] <file>