linux using console

Swith between different consoles: Ctl+Alt+F1....Ctl+Alt+F6 , six different consoles
Ctl+Alt+F7

command: ls /
ls ~
ls -l
Home directory: ~, cd ~

create file: touch empty.txt

current directory: pwd

change directory: cd cd .. cd
copy files: cp a.txt b.txt

make directory: mkdir abc

delete files: rm a.txt rm -r somedirectory; rmdir somedirectory

symbolic links: ln -s green blue;

change permissions: ls -l * ;
d: directory
l: symbolic link
-: normal files
chmod permcode file...
permcode: u (for owning user)
g (for owning group)
o (for "other")
Either a plus, minus, or equal sign, r w,x
chmod ugo+rw a.txt