SSL-TLS with OpenSSL

• Discuss Features:
• Primary Tool
• Private | Public Keys
• Certificate Signing Requests (CSRs)
• Self-Signed Certificates
• Public Key Cryptography Standards (PKCS)
• Encryption | Decryption
• Random String Generation
• Message Digests
• SSL-TLS Client

• Features
• General Usage
• Retrieve Site Certificates
• Determine OCSP Configuration
• Probe supported TLS Versions
• Extract Certificate for local usage
• Retrieve Certificate with NMap
• Retrieve Certificate Chain

• Discuss
• Generate Private Keys
• Generate Correlating CSRs
• Confirm Keys | CSRs
• Self-Signed Certificates

SSH Variables

• Discuss Features
• Bare VARs
• SSH Client
• Double Quotes
• Single Quotes
• SSH Environment

SHELL Variables

• Discuss Features
• Terminal (TTY)
• CLI Arguments
• Process ID
• Backgrounded
• SHELL Local
• Environment
• Persistence
• Aliases
• Command Substitution
• Increment | Decrement
• Dynamism

zsync

• Discuss Features
• Prep Content
• Compression
• File Names

‘7Zip’

• Features
• Archive Creation
• Inclusions | Exclusions
• FQ Paths
• Content Deletion | Extractions
• Content Exchange
• ‘tar’ with 7z
• Passwords
• Hashes
• Various Formats

‘find’

• Features
• NULL Separators
• Tests
• Negation
• [GU]ID
• Count Types
• Depth
• Actions
• SymLinks
• Times
• Content Types

JournalCTL

• Features
• Persistent | Volatile
• General Usage
• Boot LOGs
• ‘jouralctl’
• Date-Time Ranges
• Output Formats
• Timezone Shifts
• LOG Groups
• Journal Size
• Backup

Ubuntu 22x Administration

• Upgrades | Installations
  • Identify current configuration
  • Discuss new features
  • Snapshot current configuration
  • Upgrade instance online
  • Confirm upgraded environment
  • Perform Installations
  • SUDO Retrofit
  • Automatic Updates
•  

• SHELL Commands | Essentials
  • tty, pts, ll, la, l, ls, find
  • alias, cat, file, chmod, chown, history, dd, blkid
  • IO, Pipes, Redirection, Command Chaining
  • ps, top, /proc, /sys
  • head, tail, sudo, su
  • w, who, whoami, which, whereis
  • Static IPs Set
  • Duplicate VM - Retrofit
•  

• Common Network Clients
  • Identify important client utilities
  • Networking: ping, netstat, mtr, telnet
  • File Retrieval: wget, curl
  • Name Resolvers: host, dig, /etc/hosts
•  

• OpenSSH | Parallel SSH
  • Identify Defaults
  • Discuss TTYs
  • Generate SSH PKI Usage Keys
  • Ensure Password-less AUTH
  • Non-interactively transport content with SCP
  • Interactively move content with SFTP
  • Install Parallel SSH clients
  • Carry out parallel executions
•  

• File Permissions | User Management
  • Explain standard Linux (DAC) permissions
  • Alter permissions as needed
  • Test access to content
  • SET[GU]ID Exploration
  • Discuss Stickyness
  • Discuss Symbolic Links
  • Implement Soft | Hard Links
  • Examine behavior
•  

• User | Group Management
  • Identify GUI | $SHELL User Management tools
  • Explore: /etc/{passwd,shadow,group}
  • Provision users | groups as needed
  • Test functionality
  • Modify accounts | groups as desired
  • Confirm configuration
•  

• Storage Management
  • Explore current storage configuration
  • Provision additional storage as needed
  • Online Resize as desirable
  • Mount | Test | Committ to: /etc/fstab
  • Sync live content area
  • Identify current SWAP environment
  • Allocate SWAP as needed
  • Enable | Committ to: /etc/fstab
  • Logical Volume Management (LVM)
  • Identify default configuration
  • Provision LVM-dedicated storage
  • Configure: PVs | VGs | LVs
  • Extend storage as needed
  • Reduce VG as needed
  • Evaluate results
•  

• Apt | Snap Packages
  • Explore package footprint
  • Peruse configuration
  • Manage packages via 'apt'
  • Discuss Snap Uni Packages
  • Manage packages with 'snap'
  • Confirm configuration
•  

• Cron Scheduler
  • Explore default configuration
  • Discuss scheduling parameters
  • Write simple $HELL script
  • Schedule execution via Cron
  • Alter schedule as desired
  • Confirm expected behavior
•  

• SYSLOG | LOG Rotation
  • Explore default configuration
  • Discuss Syslog Rules
  • Except facilities from catchall: /var/log/syslog
  • Explore key logs
  • Explore LOG Rotation
•  

• NginX
  • Install
  • Verify
  • Explore Configuration
  • PHP Support
  • PPA Upgrade
•  

• SystemD Environment
  • Discuss Features
  • Expose managed resources
  • Manage Services
  • Journal Control
  • Hostname Control
•  

• SSH Tunneling
  • Pseudo-VPN Services
  • Contrast with VPNs
  • Create | Use Forward tunnels
  • Establish Reverse Tunnels
•  

• TCPDump Packets
  • Explore 'tcpdump' basics
  • Capture wide variety of packets
  • Use BPFs to reduce captured data
  • Replay captures with 'tcpdump'
  • Parse with BPFs as desired
•  

• GNU Privacy Guard (GPG)
  • Provision Usage Keys
  • Share Keys
  • (De|En)crypt Content
  • Sign and Verify Content
•  

• Network Reconnaissance
  • Install NMap
  • Explore footprint
  • Perform local reconnaissance
  • Quickly identify available subnet-based nodes
  • Comprehensive scan of select targets
  • Explore scripts interface and discuss
  • Evaluate results
•  

• SSH Guard
  • Install SSHGuard
  • Discuss Features
  • Generate SSH Traffic
  • Evaluate results
•  

Debian 11x Administration

• Features
• Download
• Network ISO Image
• Full ISO Image

• Network Tools | IP Configuration
• Examine default IP configuration
• Extend IP configuration to facilitate additional addresses
• Static IP Config
• Dual: Dynamic | Static Config
• Confirm communications
• Extend multiple addresses on various Instances

argV

• Features
• $SHELL Basics
• $SHELL Functions
• Perl Arguments
• Python Arguments
• PHP Arguments
• xargs

WhiteSpace

• Discuss Features
• CLI ARGs
• echo
• cat | for
• Blanks Lines
• Leading Space
• Trailing Space
• Remove Spaces
• Substitute Spaces
• Normalize Delimiters
• Record Separators
• NULL Separators
• File Names
• Fix Spaces