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Different is Beautiful

• Networking
• OS
• Virtualization
• Databases
• Security
• Storage
• Cloud
• DevOps
• Development

Networking

• TCP/IP
• Ethernet
• Firewalls
• Secure Shell
• Cisco IOS

OS

• Linux:
  • Linux Distributions
  • Linux Commands
  • LVM, ZFS
• OpenBSD
• FreeBSD
• macOS
• Cisco IOS
• PAN-OS (firewall)
• Windows: Windows 10

Virtualization

• KVM: virsh, libvirt, QEMU
• Xen
• Containers:
  • Kubernetes (CKAD)
  • Docker (docker-compose)
• VirtualBox
• multipass
• VMWare ESX
• LXC
• BHyve
• Vagrant
• Packer
• Hyper-V (2008)

Databases

Relational (SQL):

• MariaDB (2009) C, C++
• Microsoft SQL Server (1989)
• MySQL (1995) C, C++
• Oracle Database (1979)
• PostgreSQL (1996) C
• RocksDB (library) (2012) C++

Key-value:

• Redis (2009) C
• RocksDB (2012) C++
• etcd
• Infinispan

Document-oriented:

• MongoDB (JSON) (2009)

Wide column store

• Apache Cassandra (2008)

Cloud

• AWS RDS
• InfluxDB

Security

• Authentication
• SIEM, IDS
• VPN
• Wi-Fi: WEP, WPA
• Linux: SELinux and AIDE
• OpenSSH: sshd, ssh
• Network security: Firewalls
• Side-channel attacks
• Wireless Network Hacking
• Vulnerability scanners
• Cryptography: MD5, SHA
• Application Security Testing
• Security policy: Password policy
• Denial-of-service attack (DoS)

Storage

• Fibre Channel, iSCSI
• NFS
• Multipath
• NetAPP: ONTAP
• Deduplication
• HDD and SSD

Cloud

• AWS
• Azure
• DigitalOcean
• Alibaba
• IBM Cloud
• GCP

DevOps

• Ansible
• Terraform
• Configuration management: Puppet
• AWS Cloudformation
• CI/CD
• Binary repository manager

Software development

• git (2005)
• GitLab (2011)
• GitHub
• TeamCity (2006)
• Jenkins (2011)
• Changelogs

Software

• Mediawiki: Wikipedia
• Nginx: nginx.conf