$ ls cybersecurity/
Burp SuiteMetasploitNessus
Snort3WiresharkIncident Response
JWT / OAuth2
$ ls networking/
FirewallVPNWireless SecurityCOM / Serial
$ ls cloud-devops/
AWS (EC2/S3/IAM)AzureGCPOracle VM
DockerKubernetesCI/CD
NginxApacheIIS
$ ls systems/
Linux (Kali)WindowsUnix
$ ls languages/
JavaPythonC#
JavaScriptTypeScriptPHP
SQLShell
$ ls frameworks/
Spring BootNode.jsReact
VueExpressFlaskFastAPI
TomcatMavenJiraBitbucket
$ ls databases/
PostgreSQLMySQLOracle
MongoDBFirebirdSQL Server