Ubuntu 20x Administration

• Upgrades | Installations
  • Identify current configuration
  • Discuss new features
  • Snapshot current configuration
  • Upgrade instance online
  • Confirm upgraded environment
  • Perform Installations
  • SUDO Retrofit
  • Automatic Updates
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• 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
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• Common Network Clients
  • Identify important client utilities
  • Networking: ping, netstat, mtr, telnet
  • File Retrieval: wget, curl
  • Name Resolvers: host, dig, /etc/hosts
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• 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
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• 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
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• 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
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• 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
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• Apt | Snap Packages
  • Explore package footprint
  • Peruse configuration
  • Manage packages via 'apt'
  • Discuss Snap Uni Packages
  • Manage packages with 'snap'
  • Confirm configuration
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• Cron Scheduler
  • Explore default configuration
  • Discuss scheduling parameters
  • Write simple $HELL script
  • Schedule execution via Cron
  • Alter schedule as desired
  • Confirm expected behavior
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• SYSLOG | LOG Rotation
  • Explore default configuration
  • Discuss Syslog Rules
  • Except facilities from catchall: /var/log/syslog
  • Explore key logs
  • Explore LOG Rotation
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• NginX
  • Install
  • Verify
  • Explore Configuration
  • PHP Support
  • PPA Upgrade
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• SystemD Environment
  • Discuss Features
  • Expose managed resources
  • Manage Services
  • Journal Control
  • Hostname Control
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• SSH Tunneling
  • Pseudo-VPN Services
  • Contrast with VPNs
  • Create | Use Forward tunnels
  • Establish Reverse Tunnels
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• 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
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• GNU Privacy Guard (GPG)
  • Provision Usage Keys
  • Share Keys
  • (De|En)crypt Content
  • Sign and Verify Content
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• 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
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• SSH Guard
  • Install SSHGuard
  • Discuss Features
  • Generate SSH Traffic
  • Evaluate results
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REDIS 5x Replication

• Discuss Features
• Install | Upgrade
• Replicate
• Toggle Slave Replica
• Authentication
• Replica of Replica
• Writable Replica
• Failover | Promote Slave to Master

MariaDB 10x Replication

• Discuss Features
• Master | Slave Replication Config
• Add Slave
• Import Data
• Replicate Specific DBs
• Slave Replication
• Table Replication
• Failover | Promote Slave to Master

NMap Reconnaissance 7.8x

• Discuss Features
• Expose LOCALHOST
• Install Service
• LOG Scans
• Fast Scans | Specific Ports | UDP
• $USER Extension
• Subnet Scan
• Scan Subnet for Points-of-Interest
• Public Resource Scans using Scripts

BASH $PATH

• Discuss Features
• Dump $PATH
• Trace Setup
• Alter Current TTY
• Extend $PATH for ALL $USERs
• $USER Extension
• Non-Interactive SSH $SHELL

BASH Startup Environment

• Discuss Features
• Interactive | Non-Interactive $SHELL
• Compare | Contrast Startup Files
• Launch Instances
• SSH Non-Interactive $SHELL
• Alter SSH Environment
• Logout Config
• Deny Login
• Ancillary $USER Files
• /etc/skel
• Other Implementations

AWS R53 Health Checks

• Discuss Features
• TCP Health Checks
• SNS Notification Set
• Fail Monitored Service
• Invert Health Check
• Launch Multiple Instances
• Update DNS with Failover
• Application Layer Checks
• Dependent Health Checks

Redis5x NoSQL DB Cache

Intro to Key | Value Caching - RedCacheD5x

• Introduction - Redis - Features
  • Explain key features
  • Discuss data limits
  • Enumerate important Data Types
  • Install Redis
  • Explore environment
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• CLI | String Ops | Basics
  • Query Redis Server non-interactively
  • Expose Stats
  • Set key | values
  • Confirm existence of Keys
  • Enumerate Data Type
  • Determine Key Life
  • Alter Key TTL and Test
  • Increment | Decrement Values
  • Get and Set Values
  • Delete superfluous Keys
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• Lists
  • Describe features
  • Enumerate common list manipulation commands
  • Build basic list
  • Prepend list with strings
  • Append values and evaluate
  • Discover numerical length of lists
  • Sort the contents as needed
  • Return subset of list
  • Strip list values and evaluate
  • Reduce list to desired values
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• Sets
  • Discuss features and applicability
  • Contrast with lists
  • Enumerate key commands
  • Define and extend set
  • Enumerate members of set
  • Determine set cardinality
  • Remove set items
  • Find set union and intersection
  • Define sorted set
  • Contrast with standard set
  • Return sorted set items
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• Hashes
  • Discuss features
  • Contrast with lists and sets
  • Enumerate key commands
  • Define hash with common keys
  • Retrieve all and groups of keys
  • Increment | Decrement hash values
  • Remove hash keys
  • Extend hash with new keys
  • Confirm the existence of hash keys
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• Simple Authentication
  • Discuss default behaviour and caveats
  • Use openssl to generate unique password
  • Update configuration accordingly
  • Test client access with | sans password
  • Confirm functionality
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• Persistence
  • Discuss supported strategies
  • Query Redis for current persistence configuration
  • Increase snapshot frequency
  • Confirm RDB snapshot changes
  • Enable Append Only persistence
  • Confirm persistence strategies
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• Disaster Recovery
  • Discuss and contrast recovery options
  • Confirm current persistence configuration
  • Perform snapshot-based recovery
  • Confirm restoration
  • Perform append only recovery
  • Confirm restoration
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• RAM | Pipelines
  • Disable Persistence
  • Confirm data-availability | loss
  • Execute iterative adds | time
  • Construct and execute Pipelines
  • Compare performance deltas
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• Publisher | Subscriber Model
  • Discuss applicability | benefits
  • Create Channels
  • Publish Messages
  • Confirm delivery
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• Transactions
  • Discuss features and caveats
  • Enumerate key commands
  • Start and discard a transaction
  • Confirm expected results
  • Start and complete a transaction | confirm
  • CLI - generate transactions with and sans errors
  • Confirm expected behaviour
  • Use 'WATCH' to perform conditional transactions
  • Confirm results
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• Replication
  • Discuss features
  • Alter master configuration
  • Update slave configuration
  • Ensure AUTH mode enabled
  • Define interdependent slave configuration
  • Create new keys and ensure replication
  • Update slave to permit writes
  • Create new keys and ensure locality
  • Discuss Implications
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Debian | Ubuntu Updates

• Discuss Features
• Non-Interactve Updates
• SSH Environment
• Parallel-SSH Updates
• Interactive Updates
• Alter Environment

BASH Sequences

• Discuss Features
• Basic Idea
• Common Method
• Simple Script
• Updated Method
• Compare | Contrast

AWS S3

• Discuss Features
• Bucket Basics
• Populate | Fetch Content
• Sync Content
• Public Bucket
• S3 Static Site
• Versioning
• Access Logs