How to Install and Set Up FireJail on Arch Linux

What is FireJail?

FireJail is a security sandbox program that uses Linux namespaces and seccomp-bpf to restrict the running environment of untrusted applications. It helps to isolate applications and limit their access to the system, enhancing security.

Step 1: Install FireJail

Open your terminal and run the following command to install FireJail:

sudo pacman -S firejail

Step 2: Verify Installation

After installation, you can verify that FireJail is installed correctly by checking its version:

firejail --version

Step 3: Basic Usage

To run an application in a FireJail sandbox, simply prefix the command with firejail. For example, to run Firefox in a sandbox, use:

firejail firefox

Step 4: Using FireJail Profiles

FireJail comes with predefined profiles for many applications. You can view the available profiles in the /etc/firejail directory:

ls /etc/firejail

To run an application with a specific profile, use:

firejail --profile=/etc/firejail/.profile 

Replace <profile_name> with the desired profile and <application> with the application you want to run.

Step 5: Customizing FireJail

You can create your own custom profiles by copying an existing profile and modifying it. For example:

sudo cp /etc/firejail/firefox.profile ~/.config/firejail/myfirefox.profile

Edit the new profile using your preferred text editor:

nano ~/.config/firejail/myfirefox.profile

Step 6: Check FireJail Status

To check the status of running FireJail sandboxes, use:

firejail --list

Conclusion

FireJail is now installed and configured on your Arch Linux system. You can use it to run applications in a secure sandbox environment, enhancing your system’s security.

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