avsingh999/bash-for-beginners

bash-for-beginners

Creating your first bash script and running it.

1. Create a .sh file.
   touch hello-world.sh

2. Edit the script.
   nano hello-world.sh

3. Write code as follows.

   #!/bin/sh
   echo Hello World

4. Press Ctrl+o and then ctrl+x. The first shortcut will save the file, and the second shortcut will exit the nano terminal editor.

5. RUN the script.
   bash hello-world.sh
   This will show you the output.

And voilà! You successfully learned:

1. how to create files using the touch command
2. how to edit files using the nano text editor
3. how to runn a bash script with bash command.

Linux command

• Create a file using bash command: touch <filename>

Usage: Hello World In Bash Shell

var="Hello World"

print it

echo "\$var"

Basic Bash commands

pwd : pwd stands for print working directory and it points to the current working directory

pwd

ls : ls stands for a list and it lists the contents of a directory

ls

cd : cd stands for Change Directory and changes the active directory to the path specified

cd

mkdir : mkdir stands for Make directory and is used to make a new directory or a folder

mkdir Demo

mv : mv stands for Move and it moves one or more files or directories from one place to another

mv Demo/*.py Demo/Pythonfiles

touch : The touch command is used to create new, empty files

touch foo.txt

rm : rm stands for Remove and it removes files or directories

rm foo.txt

rmdir : rmdir stands for remove directory and is used to remove empty directories from the filesystem

rmdir ../Pythonfiles/

cat : Print out the content of a file in the terminal

cat foo.txt

vi : Open a file in a text editor. Other editors include nano,emacs,vim.

vi foo.txt