This is a series of exercises. Some give you a specific task to do, while others are open-ended, We highly recommend you to try them out.

for this tutorial you you need a Unix shell like bash or zsh, if you are on Linux , you don't have to do anything for windows you can use Windows Subsystem for Linux or a Linux virtual machine to use Unix-style command-line tools.

1. make a directory called LC in your home dir
2. use touch to create a new file called test in your LC dir
3. write the following into that file

   #!/bin/sh
       curl --head --silent https://www.google.com/
   

The first line called shebang (look it up !) what is sh ? how it is different from bash ? look it up and you can try something like fish or zsh

4. Try to execute the file, i.e. type the path to the script (./test) into your shell and press enter. Understand why it doesn’t work by consulting the output of ls (hint: look at the permission bits of the file). is it executable ?

5. Run the command by explicitly starting the sh interpreter, and giving it the file test as the first argument, i.e. sh test. Why does this work, while ./test didn’t?

6. Look up the chmod program (e.g. use man chmod).

7. Use chmod to make it possible to run the command ./test rather than having to type sh test. How does your shell know that the file is supposed to be interpreted using sh?

8. make a python file called testpy , in the same manner make the file print "hello world" when executing it ./testpy

9. what is the diiference between > and >> explain with exapmles

10. we talked about aliases. it is very common to alias ll to ls -alh How can you do it ?

Note : This is a markdown file , it is very easy to use, search how to use it.

1. Follow this tmux tutorial

oprional then learn how to do some basic customizations following these steps.

2. explore the fzf program you can easily install it with apt run fzf what does it do ?

you can do alot of things check this tutorial

3. try running apt install vim problem right ? so after it run sudo !! what just happen, try to guess and search for it , try !15

4. run histroy what does it do ? search for advanced usage. how about cat ~/.bash_history what does this file contain? finally press ctrl + r. type something. can fzf be integrated here ?

5. what is symoblic links? how to make them? think of examples when they are useful ?

optional search for hard links how they differ from symbolic links after creating a link run ls -l what do you notice ?

6- what does diff command do ? how it is useful ? what about patch