AppArmor Profiles and Troubleshooting Cheat Sheet
Inspect AppArmor confinement, author least-privilege profiles, diagnose denials, validate policy, and deploy or roll back changes safely.
Open cheat sheetLinux · 11 guides
Identity, Access, and Security
Manage users, authentication, privileges, policy, auditing, and cryptography.
Focused references
Identity, Access, and Security cheat sheets
Each guide includes copy-ready syntax, detailed examples, and authoritative references.
Linux Audit Framework and auditd Cheat Sheet
Inspect Linux Audit health, design efficient rules, manage persistent auditd policy, search complete events, and protect audit evidence safely.
Open cheat sheetLinux Capabilities and File Attributes Cheat Sheet
Audit and manage Linux process capabilities, file capabilities, securebits, systemd bounding sets, extended attributes, and immutable or append-only flags.
Open cheat sheetLinux PAM Authentication Cheat Sheet
Understand and troubleshoot Linux PAM stacks, control flags, module types, password policy, lockouts, access rules, sessions, and safe configuration changes.
Open cheat sheetLinux Permissions Cheat Sheet
Inspect and manage Linux file modes, ownership, default permissions, and special directory permissions safely.
Open cheat sheetLinux sudoers Policy and Privilege Delegation Cheat Sheet
Design least-privilege sudoers policy, validate changes with visudo, constrain commands and run-as identities, and audit delegated access safely.
Open cheat sheetLinux Users and Groups Cheat Sheet
Inspect and administer Linux user and group identities, supplementary membership, passwords, account aging, shells, and retirement with explicit safeguards.
Open cheat sheetOpenSSH Connections and File Transfer Cheat Sheet
Connect, authenticate, forward ports, verify host keys, copy files, configure aliases, and troubleshoot OpenSSH clients safely.
Open cheat sheetOpenSSL TLS and Certificate Inspection Cheat Sheet
Inspect certificates, CSRs, private keys, PKCS#12 bundles, verification chains, and live TLS endpoints safely with current OpenSSL commands.
Open cheat sheetSELinux Administration and Troubleshooting Cheat Sheet
Inspect SELinux state, diagnose AVC denials, manage persistent file labels, booleans, ports, and narrowly scoped troubleshooting safely.
Open cheat sheetSSSD and Directory Integration Cheat Sheet
Integrate Linux with Active Directory, FreeIPA, or LDAP through SSSD using secure discovery, identity lookup, access policy, caching, and diagnostics.
Open cheat sheet