Command Line Tutorial for Beginners Ubuntu 16.04 Xenial LTS

November 6, 2017 | By the+gnu+linux+evangelist.

Deleting

7. Annihilating

Finally, we try investigating our Magical Destroying Powers
Deleting Directories and Files!

Especially Releant: in a Working Environment you should Triple Check the Commands Before Execution…
Because in the Shell Environment there’s No Trash Bin and so the stuff is directly Annihilated!!!

[And as you may have already wittily perceived, here “Removing” is just Resumed in “rm“]
- How Removing Files.
  
  First, we Wipe Out the ‘box’ in the ‘livingroom’ with:
```
rm $HOME/livingroom/box
```
  Check it with:
```
ls $HOME/livingroom/
```
  Now we try the same for Multiple Entities…
  First, we Make a Copy of the ‘can’ into then ‘bathroom’ in a ‘jar’ into the ‘bedroom’, Magically as before… :)) with:
```
cp $HOME/bathroom/can $HOME/bedroom/jar
```
  And now how to brutally Get Rid of Both? Simply like that:
```
rm $HOME/bathroom/can $HOME/bedroom/jar
```
- How Removing Directories.
  
  Now we Start to furiously Destroying our nice Home… [[[:
  First, we Raze the ‘livingroom’:
```
rm -rf $HOME/livingroom
```
  “-rf” is a combination of Flags. “r” for Recursively and “f” for Forced
  And finally, finally, we simply Desert All-in-one the Remaining Habitats:
```
rm -rf ~/bathroom ~/bedroom ~/garden
```
Sorry, we have Turned our Home into Empty Space, but What a JOKE! {{{:
And to Execute a Command as SuperUser
This should be the Recommeded practice to Operate as root on Linux File System:
```
sudo su -c 'myCommand'
```
Or:
```
sudo myCommand
```
So for instance to List the Protected root Directory try to run:
```
sudo ls /root
```
Finally, to Login as root Admin User
And this is only advisable in case you have to work as SuperUser for many Commands in succession…
So to Login:
```
sudo su
```
If Got “User is Not in Sudoers file” then see: How to Enable sudo
And then to Logout simply:
```
exit
```
To Protect your System from the potential Damage of an Hazardous Crazy Command Execution the Logout should be executed every Time your Setup is Achieved!
How to Set Permissions on Ubuntu File System

Ubuntu Permissions Quick Start

Setting Up Permissions on Ubuntu