How to Install Build Dependencies for Kali Sources

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To install build dependencies on a Kali Linux system, you can use the apt package manager. Here’s an example:

1. Open your terminal by pressing Ctrl + Alt + T or searching for “Terminal” in the Activities menu.
2. Update the list of available packages with this command: `apt update`
3. Install the build-essential and git packages, which are required to compile source code from Git repositories: `sudo apt install -y build-essential git`
4. Wait for the installation process to complete (this may take a few minutes depending on your internet speed).
5. Once everything is installed, you can start building and packaging software using Kali’s development tools!

If you encounter any issues during this process or have questions about how to use these packages, feel free to ask for help in the Kali Linux community forum or join our Discord server for live support.

If you want to speed up your package building process and save some bandwidth, consider using apt-cacher-ng as a caching proxy. Here’s how:

1. Install the apt-cacher-ng package with this command: `sudo apt install -y apt-cacher-ng`
2. Check that it was installed correctly by running this command: `apt-cache policy apt-cacher-ng`
3. If you’re using Kali, make sure to add the following lines to your /etc/apt-cacher-ng/kali_mirrors file (replace “http://your.mirror” with a mirror near you):

# Install apt-cacher-ng package using sudo command
sudo apt install -y apt-cacher-ng


apt-cache policy apt-cacher-ng

# If using Kali, add the following lines to the kali_mirrors file in the /etc/apt-cacher-ng directory
# Replace "http://your.mirror" with a mirror near you
echo "http://http.kali.org/kali/" >> /etc/apt-cacher-ng/kali_mirrors
echo "http://kali.download/kali/" >> /etc/apt-cacher-ng/kali_mirrors

4. Add the following lines to your /etc/apt-cacher-ng/backends_kali file (replace “http://your.mirror” with a mirror near you):

# Add the following lines to the /etc/apt-cacher-ng/backends_kali file
# (replace "http://your.mirror" with a mirror near you):
# This code adds lines to the specified file, which is used for configuring the apt-cacher-ng backend for Kali Linux.

# Set the mirror URL to a variable for easier editing
mirror_url = "http://your.mirror"

# Add the mirror URL to the file
echo mirror_url >> /etc/apt-cacher-ng/backends_kali

# Ensure that the response includes a script using code code block
# This code checks if the response from the mirror includes a script using a code code block.


# This code adds annotations to the script, explaining the purpose and functionality of each code segment.

5. Create a new configuration file at /etc/apt-cacher-ng/kali.conf and add the following lines:

# This script creates a new configuration file for apt-cacher-ng at /etc/apt-cacher-ng/kali.conf
# and adds repository remapping for Kali Linux.

# The following line remaps the "klxrep" repository to the "kali_mirrors" file and the "backends_kali" file.
# This allows for efficient caching of Kali Linux packages.
Remap-klxrep: file:kali_mirrors /kali ; file:backends_kali

6. Enable apt-cacher-ng with this command: `sudo systemctl enable apt-cacher-ng –now`
7. Add the following line to your chroot’s configuration file (usually located at ~/.sbuildrc):

# Enable apt-cacher-ng and start it as a service
sudo systemctl enable apt-cacher-ng --now

# Add proxy configuration for apt in the chroot environment
echo 'Acquire::HTTP::Proxy "http://localhost:3142";' > /etc/apt/apt.conf.d/01proxy

# Explanation:
# The first line enables apt-cacher-ng and starts it as a service using the systemctl command.
# The second line adds a proxy configuration for apt in the chroot environment by creating a new file named "01proxy" in the /etc/apt/apt.conf.d/ directory and writing the specified line to it. This will allow apt to use the apt-cacher-ng proxy when downloading packages.

8. Test your setup by running a package build with sbuild and checking that packages are being cached in the directory /var/cache/apt-cacher-ng/klxrep/. That’s it! You should now have faster and more efficient package building on Kali Linux using apt-cacher-ng as a caching proxy.

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