cd

cd - 
cd stands for 'change directory' and as the name suggests you can change your directory with help of this command.

i. E.g. - cd /home
If you hit the above command you will land in '/home' directory. Like this you can switch to any other directories in your system, you just need to write the path of the directory with cd command.
syntax - cd /<path_of_directories>

ii. E.g. - cd ..
This is another use of 'cd' command, if you write 'cd ..' in your terminal you will land in a previous directory of your current directory. You don`t need to pass any path with this option.

iii. E.g. - cd ../..
Now with this option you will land in pre