Hands-On

Linux programming (scripting)

Shell Scripting is the language of the linux terminal. Shell scripts are sometimes referred to as “shebang” which is derived from the “#!” notation. Shell scripts are executed by interpreters present in the linux kernel. Interpreters include: bash, csh, zsh e.t.c. Most popular of which is bash.

Typical operations performed by shell scripts include file manipulation, program execution, and printing text.

How to Write Shell Script in Linux/Unix

• Create a file using a vi editor(or any other editor). Name script file with extension . sh.
• Start the script with #! /bin/sh.
• Write some code.
• Save the script file as filename.sh.
• For executing the script type bash filename.sh.

Github administration

Creating a repository

Create a project directory and cd into it. Execute the following git command from the directory to create a git repository.

git init

Checking out a repository

You can create a copy of your git repository using the clone command. Execute the following command to clone your project directory.

git clone /path/to/project-repository

Every git repository has three trees. A working directory, Index and Head. ====

• Working directory: It contains the actual project files.

• Index: It is the staging area where you add the project files that needs to be committed.

• Head: Head is where the reference to you previous commit exists.

Adding file to the staging area: (add)

git add <filename>

Let’s say you want to add all the files in your project directory to the staging area. Execute the following command to do the same

git add --all

Committing new changes to the repository (commit):

Once you have added all the files to the staging area, you can commit the changes with a reference message using the “-m” flag as shown below.

git commit -m “my first commit”

Using public git-hub packages (installing, upgrading)

Creating own private repository

There aren't any special steps required to create a private GitHub repository. They're exactly the same as if you were to create a standard GitHub repository, albeit with one difference: You click the radio button for the Private option