Last updated: July 3, 2022
I present here a list of five orders à never use on your linux machine but you can possibly test on a virtual machine.
Some malicious users may post dangerous commands to Discord or to a Facebook group that destroy the system or data. You must therefore be careful and know how these commands work to avoid using them without thinking.
rm-rf /
This command simply erases all the files on your hard drive. Once deleted, files cannot be recovered.
The rm -rf command is one of the quickest ways to delete a folder and its contents.
mkfs.ext3 / dev / sda
Mkfs is a command used to format hard drives. Here it will erase the data from the disk / Dev / sda.
: () {: |: &} ;:
This command is actually a fork bomb. If you run it, your system will be forced to create processes until the memory is full. Which forces you to crash and may cause system corruption.
mv ~ / * / dev / null
Moving a file or directory to / dev / null is like throwing it in the trash.
/ Dev / null is the equivalent of the permanent recycle bin, any file sent to this output results in its deletion. And this without the possibility of restoration.
With the addition of the character ~ would delete all files from your home folder, while the character * would delete all of your configuration files.
Linux will happily obey this command and delete everything without asking you, so be careful when using it!
dd if = / dev / zero of = / dev / sda
This command will write zeros to all blocks on the hard drive and result in complete data loss. This is like doing a complete formatting.