Mac OS terminal commands for Beginner

command + K = clear all of the command lines

// PWD(print working directory 
martincho@Martins-MacBook-Air-2 ~ % pwd
/Users/martincho
///open directory
martincho@Martins-MacBook-Air-2 ~ % open /Users/martincho 
// list that shows all of the dirctroies
martincho@Martins-MacBook-Air-2 ~ % ls 
Applications   Library    Public
Desktop    Movies    iCloud Drive (Archive)
Documents   Music    iCloud Drive (Archive) - 1
Downloads   Pictures
 // change directory
martincho@Martins-MacBook-Air-2 ~ % cd movies
martincho@Martins-MacBook-Air-2 movies %
//take me to previous dirctory
martincho@Martins-MacBook-Air-2 movies % cd .. 
martincho@Martins-MacBook-Air-2 ~ % pwd
/Users/martincho
// tilde symbol take you to your home directory 
martincho@Martins-MacBook-Air-2 ~ % cd ..
martincho@Martins-MacBook-Air-2 /Users %  cd ..
martincho@Martins-MacBook-Air-2 / % cd ~ 
martincho@Martins-MacBook-Air-2 ~ %
//create file
martincho@Martins-MacBook-Air-2 ~ % touch test_file.txt
martincho@Martins-MacBook-Air-2 ~ % ls
Applications   Library    Public
Desktop    Movies    iCloud Drive (Archive)
Documents   Music    iCloud Drive (Archive) - 1
Downloads   Pictures   test_file.txt
martincho@Martins-MacBook-Air-2 ~ % open tet_file.txt
The file /Users/martincho/tet_file.txt does not exist.
martincho@Martins-MacBook-Air-2 ~ % open test_file.txt
martincho@Martins-MacBook-Air-2 ~ %
//Tip to open file easilly
martincho@Martins-MacBook-Air-2 ~ % ls
Applications   Music
Desktop    Pictures
Documents   Public
Downloads   iCloud Drive (Archive)
Library    iCloud Drive (Archive) - 1
Movies    test_file.txt
martincho@Martins-MacBook-Air-2 ~ % open P  //type open P and hit TAP key instead of return
Pictures/  Public/   //since we have two folders start with P, it shows two foloder.
martincho@Martins-MacBook-Air-2 ~ % open Pu // tap it will navigate you to "Public" as shown below 
martincho@Martins-MacBook-Air-2 ~ % open Public/
//editing file on terminal
martincho@Martins-MacBook-Air-2 ~ % nano test_file.txt
// see all the preivous commands
martincho@Martins-MacBook-Air-2 ~ % history
  106  open p
  107  open P
  108  open Pi
  109  open Pu
  110  open P
  111  ls
  112  ls
  113  open Public
  114  ls
  115  ls
  116  ls
  117  nano test_file.txt
  118  open test_file.txt
  119  nano test_file.txt
  120  nano test_file.txt
  121  hisory
// remove file in command line
martincho@Martins-MacBook-Air-2 ~ % rm test_file.txt
martincho@Martins-MacBook-Air-2 ~ % ls
Applications   Music
Desktop    Pictures
Documents   Public
Downloads   iCloud Drive (Archive)
Library    iCloud Drive (Archive) - 1
Movies
//create folder
martincho@Martins-MacBook-Air-2 ~ % mkdir test_folder  
martincho@Martins-MacBook-Air-2 ~ % ls
Applications   Music
Desktop    Pictures
Documents   Public
Downloads   iCloud Drive (Archive)
Library    iCloud Drive (Archive) - 1
Movies    test_folder
martincho@Martins-MacBook-Air-2 ~ % cd test_folder
martincho@Martins-MacBook-Air-2 test_folder % touch test_file_2.txt
martincho@Martins-MacBook-Air-2 test_folder % pwd
/Users/martincho/test_folder
martincho@Martins-MacBook-Air-2 test_folder % cd .. 
martincho@Martins-MacBook-Air-2 ~ % pwd
/Users/martincho
// another way to create folder in the different directory
martincho@Martins-MacBook-Air-2 ~ % touch test_folder/test_file_3.txt
martincho@Martins-MacBook-Air-2 ~ % cd test_folder
martincho@Martins-MacBook-Air-2 test_folder % ls
test_file_2.txt test_file_3.txt
martincho@Martins-MacBook-Air-2 test_folder % cd ..
martincho@Martins-MacBook-Air-2 ~ % mkdir test_folder/test_folder_2
martincho@Martins-MacBook-Air-2 ~ % cd test_folder
martincho@Martins-MacBook-Air-2 test_folder % ls
test_file_2.txt test_file_3.txt test_folder_2
martincho@Martins-MacBook-Air-2 test_folder % cd test_folder_2
martincho@Martins-MacBook-Air-2 test_folder_2 % pwd
/Users/martincho/test_folder/test_folder_2
// the way to delete directory 
martincho@Martins-MacBook-Air-2 ~ % rm test_folder
rm: test_folder: is a directory
martincho@Martins-MacBook-Air-2 ~ % rm -r test_folder
martincho@Martins-MacBook-Air-2 ~ % ls
Applications   Music
Desktop    Pictures
Documents   Public
Downloads   iCloud Drive (Archive)
Library    iCloud Drive (Archive) - 1
Movies
martincho@Martins-MacBook-Air-2 ~ %