The shell accepts user commands and executes each command in a separate process, providing basic shell functionalities including process handling, internal commands, and a history feature.

1. Command Execution: Executes user commands in separate child processes using fork() and execvp().
2. Background Execution: Allows commands to run in the background by appending & at the end of the command.
3. Internal Commands:
   • exit: Exit the shell program.
   • pwd: Display the current working directory.
   • cd: Change the current working directory.
   • help: Display help information on internal commands.
4. Shell Prompt: Displays the current working directory in the shell prompt.
5. History Feature: Maintains a history of the 10 most recent commands.
   • history: Display the 10 most recent commands.
   • !n: Re-run the command numbered n from the history.
   • !!: Re-run the previous command.
   • !-: Clear all previous commands from the history.
6. Signal Handling: Custom signal handler for SIGINT to display help information when Ctrl+C is pressed.

• Linux operating system
• GCC compiler

1. Clone the repository:

   git clone https://github.com/ahmad-masud/Linux-Shell
   cd Linux-Shell

2. Build the project:

   make

3. Run the shell:

   ./shell

• To run a command, simply type it at the prompt and press Enter.
• To run a command in the background, append & at the end of the command.
• Use internal commands like pwd, cd, exit, and help as needed.
• Use history to view recent commands and !n to re-run a specific command from the history.

/home/user$ ls -l
/home/user$ cd /usr
/usr$ pwd
/usr
/usr$ history
30 history
29 cd /usr
28 ls -l
...
/usr$ !28
ls -l

• shell.c: Main source code for the shell.
• Makefile: Build instructions for the project.
• test_shell.sh: Testing file for shell.

This project is licensed under the MIT License - see the LICENSE file for details.