# Debian
Debian is one of the oldest and most influential [[Linux]] distributions, founded by [[Ian Murdock]] in 1993. The name combines "Debra" (his then-girlfriend) and "Ian." Known for its stability, strict adherence to free software principles, and vast software repository, Debian serves as the foundation for many other distributions including [[Ubuntu]], Linux Mint, and Raspberry Pi OS.
Debian is developed by a large volunteer community and governed by the Debian Social Contract, which commits to keeping the system 100% free software. The Debian Free Software Guidelines (DFSG) have become a foundational definition of open source.
## Key Characteristics
- **Stability**: Extensively tested before release; favored for servers
- **Free software**: Strict commitment to open source principles
- **Universal**: Supports 9+ hardware architectures
- **Package management**: apt/dpkg with 59,000+ packages
- **Community-driven**: No corporate owner; volunteer-maintained
## Release Branches
| Branch | Description | Use Case |
|--------|-------------|----------|
| **Stable** | Thoroughly tested, frozen packages | Production servers |
| **Testing** | Next stable release, newer packages | Desktop users |
| **Unstable (Sid)** | Rolling, latest packages | Developers |
## Package Management
```bash
# Update package lists
sudo apt update
# Upgrade all packages
sudo apt upgrade
# Install a package
sudo apt install package-name
# Search for packages
apt search keyword
```
## References
- https://www.debian.org
- https://en.wikipedia.org/wiki/Debian
## Related
- [[Linux]]
- [[Ubuntu]]
- [[Linus Torvalds]]