Learn developer tools, Linux, networking, DevOps, security, databases, APIs, and cloud concepts through visuals and simple explanations.
This repository is a collection of visual cheat sheets and infographics for developers, sysadmins, DevOps engineers, security learners, and anyone who wants to understand modern computing concepts faster.
- Linux and command line
- Networking and protocols
- Git, Docker, and Kubernetes
- DevOps and cloud
- Security and cryptography
- Databases and APIs
- Browse the files
- Linux commands
- Linux directory structure
- Linux file permissions
- Linux file types
- Linux boot process
- Linux architecture
- Linux shells
- Bash scripting
- Bash loops, functions, brackets, and parameter expansion
- Cron
- Grep, awk, sed, find, tar, curl, less, vim, netcat, nmcli
- Redirection and pipes
- Process management
- Logical Volume Manager
- ACLs, UFW, iptables, autofs
- OSI vs TCP/IP
- Network protocol stack
- Common network protocols
- DNS and DNS record types
- DHCP, ARP, GARP, NAT, NTP, SNMP
- IPv4 vs IPv6
- TCP three-way handshake
- HTTP status codes
- HTTP/2 vs HTTP/3
- Traceroute
- Routing schemes
- VLAN port types
- MAC addresses
- Email protocols
- Git fundamentals
- Git workflow
- Git commands
- Git merge vs rebase vs cherry-pick
- How Git works
- Docker cheat sheets
- How Docker works
- Docker components
- Containers vs VMs
- Kubernetes components
- Kubernetes scaling strategies
- DevOps concepts
- DevOps tools
- Ansible architecture
- Cloud platform models
- Types of servers
- Server hardening
- Admin tips
- Log parsing commands
- Cybersecurity roadmap
- SSH and SSH server hardening
- TLS/SSL handshake
- Public key cryptography
- Digital signatures
- Encryption types
- SPF, DKIM, and DMARC
- Tokens vs APIs
- SQL cheat sheet
- SQL joins
- Common database types
- Main database types
- API architecture styles
- REST API design
The visuals are available in image and PDF formats:
This work is licensed under CC BY-NC-ND 4.0.
You may share the original materials for non-commercial purposes with attribution. You may not sell them, use them commercially, or distribute modified versions.
Spotted a typo or an issue? Contributions are welcome for corrections, file organization, and metadata improvements. See CONTRIBUTING.md.