LVM | ZFS Administration

Intro to Volume Management with LVM & ZFS

• LVM Provisioning
  • Discuss features and benefits
  • Identify storage configuraiton
  • Segment storage to accomodate LVM
  • Flag volumes accordingly
  • Incorporate volumes under LVM management
  • Create Volume Group
  • Abstract Volume Group into LVM Logical Volume
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• Storage Expansion
  • Disucss applications
  • Identify current storage configuration
  • Provision additional partition space
  • Incorporate flagged partition space under LVM management
  • Extend Volume Group with new Storage
  • Extend underlying LVM Logical Volume with new Storage
  • Extend underlying File System (FS) to support new space
  • Evaluate online resizing of LVM Volume
  • Confirm results
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• Merge | Split Volumes
  • Disucss use-case scenarios
  • Generate new Volume configuration
  • Create data footprint with checksum
  • Collapse new Volume into existing Volume
  • Merge Volumes
  • Identify LVM Volume resources post-merge
  • Confirm availability of content via checksum
  • Reverse process via Split
  • Confirm split Volumes and associated data
  • Discuss results
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• Import | Export Volumes
  • Disucss applicability
  • Discuss common steps
  • Flag volume for export
  • Shift volume between virtual nodes
  • Attach shifted volume to new node
  • Imort volume to new node
  • Confirm import and ensure data are intact
  • Confirm checksum
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• Volume Striping
  • Discuss Volume Aggregation benefits
  • Implement single-striped volume and evaluate PE allocation
  • Alter volume to support multiple stripes
  • Confirm equal spread of striping information across Physical Volumes (PVs)
  • Stripe data as needed and discuss ramifications
  • Evaluate and discuss findings
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• Volume Mirroring
  • Disucss supported mirroring options
  • Implement single copy mirror with in-memory (core) LOG
  • Fail mirror and evaluate response
  • Spread mirror via reconfiguration across multiple devices
  • Dedicate one mirror volume to LOG data to improve recoverability
  • Fail mirror and evaluate behavior
  • Discuss alternative configurations to improve responsiveness
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• Snapshots
  • Discuss applicability
  • Identify key commands
  • Take snapshots of volume at various points-in-time
  • Generate I/O in-between point-in-time snapshots
  • Contrast snapshot data with original volume
  • Compare various snapshot data
  • Write to snapshot volume
  • Discuss features and use-cases
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• Physical Volume (PV) Migration
  • Discuss applicability
  • Select system and identify LVM components
  • Reorganize LVM Components for Migration
  • Simulate failed PV and move extents to remaining members
  • Allocate storage for extents migration
  • Move extents and confirm new allocation
  • Move extents to specific target and evaluate
  • Confirm online access to data during migration
  • Consider various applications of PV migration
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• ZFS Intro | Stripes
  • Discuss key features
  • Create Stripe-based ZFS Pool
  • Examine Stripe attributes
  • Change Default Mount Point
  • Rename FS
  • Set attributes and evaluate
  • Destroy Pool and related FS
  • Recreate Stripe-based Pool
  • Extend Stripe and evaluate
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• ZFS Mirroring
  • Discuss key features
  • Upgrade Stripe to Mirror and evaluate
  • Downgrade Mirror to Stripe and evaluate
  • Create N-Way Mirror
  • Destroy Mirror and Re-create
  • Soft Fail Mirror Component
  • Replace 'Failed' Component
  • Confirm data synchronization
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• ZFS Redundancy | RAIDZ
  • Discuss key features
  • Examine default ZFS Pool
  • Create RAIDZ1 Pool and evaluate
  • Extend RAIDZ1 Pool
  • Soft Fail various RAIDZ1 Components
  • UnFail various RAIDZ1 Components
  • Destroy RAIDZ1 Configuration
  • Prepare RAIDZ2 Pool
  • Examine attributes
  • Soft Fail various RAIDZ2 Components
  • UnFail and confirm re-synch
  • Destroy RAIDZ2
  • Prepare RAIDZ3 Pool
  • Soft Fail various RAIDZ3 Components
  • Confirm availability
  • Contrast RAIDZ levels
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• ZFS File System | Compression
  • Discuss key features
  • Create default Stripe and evaluate
  • Create compressed FS
  • Generate data to both and compare footprint
  • Store compressed media file and evaluate
  • Destroy Pool and related FS
  • Recreate Pool with top-level container compression
  • Confirm inheritance
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• ZFS File System | Quotas
  • Discuss key features
  • Create FS with quota
  • Generate data beyond quota-limit
  • Evaluate effective footprint
  • Extend quota and re-generate data
  • Implement user | group quotas
  • Provision storage reservation
  • Confirm FS reservation
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• ZFS File System | Snapshots
  • Discuss key features
  • Enumerate existing snapshots
  • Take recursive snapshots and confirm
  • Expose snapshot container
  • Read from snapshots
  • Attempt writes to snapshots
  • Rollback File Systems
  • Take multiple snapshots
  • Rollback to specific snapshot
  • Place hold and release on snapshot
  • Destroy snapshots
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• ZFS File System | Clones
  • Discuss key features
  • Create various snapshots
  • Generate clones
  • Access clones in user-space
  • Alter mount point
  • Promote clone
  • Confirm snapshot-detachment
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• ZFS Misc
  • Destroy and Recreate FS
  • Implement various case-sensitivity options
  • Confirm expected behaviour
  • Restrict per-FS content executability
  • Toggle and test
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CentOS9x Stream Administration

• Initial Environment
• ls, pwd, cd, cp, mv, rm, mkdir, rmdir, whoami
• alias, cat, file, chmod, chown, history
• STD(IN|OUT), Pipes, Redirection, Command Chaining
• ps, df, top, free
• Pagers, W-Commands
• Checksums
• Awk | Sed | Grep Usage
• BASH SHELL Environment
• Compression | Archival Tools
• SSH Equivalence
• SHELL Quoting
• Propagate Environment
• Secure Clients

• Identify Standard File Types
• Standard File Permissions
• Symbolic Links
• Transfer Permissions

• Identify SWAP environment
• Provision dedicated SWAP partitions
• Add | Remove SWAP from pool as needed
• Provision File System-based SWAP
• SWAP Share
• SWAP Persistence
• Identify default storage configuration
• Provision new storage as needed
• XFS - File System
• XFS - Grow File System
• Identify LVM defaults
• Add new partitions to LVM management
• Allocate storage to LVM Volume Groups
• Create Logical Volumes (LVs) as needed
• Overlay File System and mount where applicables
• LVM - Resize
• LVM - Mixed FS
• LVM - SWAP

• Features
• Install
• Defaults
• General Usage
• Update Accounts

• Defaults
• Shared PASS Gen
• Unique PASS Gen
• Encrypted PASS Gen
• Update Accounts
• Groups

• Discuss features | limitations
• Identify default system-wide schedule
• Peruse various default Cron Jobs
• Schedule simple job and monitor recurrence
• Evaluate results

• Peruse Default CONF
• Discuss Syslog Rules
• Explore Log Rotate defaults
• Ensure rotated logs are compressed
• Extend default retention scheme
• Force Log Rotation as needed

• Explore Default environment
• Install PKGs
• Dump important metadata from packages
• Apply Updates

• Default CONF
• Add | Confirm IPs as needed

• Install
• Copy Configuration
• SELinux - Confirm
• TLS | SSL Services
• cURL Client Tests
• Virtual Hosts
• ENC Sites Only

• SFTP Only USER
• SFTP Only USER - NOLOGIN
• SFTP Only Group - Control
• NMap Intro

SysLOG with rSysLogD

• Discuss Features
• Default Environment
• Kernel Firewall LOG
• Split LOGs by Priorities
• UDP | TCP Logging
• Dual L4 Logging
• Multiple Hosts
• Basic Queueing
• Reliable Event Logging Protocol (RELP)
• RELP - Remote Only
• RELP Only
• Traditional to RELP
• SysLOG Clear-Text - Confirm
• Property Filters
• Expression Filters
• Relay Chain

Netfilter Tables

• Features
• SSHGuard
• Ruleset Basics
• Persistence
• Sample Rules
• Inbound Filtering
• Dormant Table
• Manage Tables | Chains | Rules
• Counters
• Sets
• LOG Basics
• LOG with Sets
• Closed-Port LOGs
• LOG Options
• Re-Route LOGs
• Jump Targets
• Chain Jumping
• GoTo Chains
• Meta Selectors

Debian 12x Administration

• Features
• Download
• Graphical Install
• Text Install
• Post-Install Tweaks

• Explore usage of the following useful commands
• tty | /dev/pts | w | whoami | who
• set | env | export | unset
• cat | echo | touch | rm
• pwd | ls | cd | mkdir | alias | umask
• head | tail
• dd
• find
• history
• STDIN, STDOUT, STDERR, UNIX Pipes, Redirection, Command Chaining
• ps, df, free, top, dd
• stat, which, w, who
• tar | gzip | bzip2 | xz
• ZSH Setup

• Network Tools | IP Configuration
• Examine default IP configuration
• Extend IP configuration to facilitate additional addresses
• Static IP Config
• Dual: Dynamic | Static Config
• Multiple Interfaces
• Dual Network Services
• Confirm communications

PHP One-Liners

• General Usage
• Count Lines
• Word Count
• Count Chars
• Split Lines into ARRAY
• Count Instances of Fields
• Transform Delimiters
• Anonymize LOGs
• Extract Unique SRCs
• Lines by Error Code
• LOG By Code
• Summarize Error Codes
• Pre-Seed Error Codes
• Random Strings
• Varied Passwords
• Expose Undefined Passwords
• Outdated Passwords
• Hash | Un-Hash

Cloud Storage with GlusterFS

• Discuss Features:
• Default Volume Type
• Common Volume Types
• Transport Types
• File System Support
• Storage Model

• Features
• Provision Storage
• Allocate GlusterFS Brick
• Persistence
• Generate IO
• Multiple File Systems
• Various Sizes
• Stop | Remove Volume
• Reconstitute Volume
• Server Mount
• Evaluate

OpenPGP with GPG

• Discuss Features:
• Primary Tool
• Private | Public Keys
• Public Key Cryptography Standards (PKCS)
• Encryption | Decryption
• Signing | Verification

• Features
• General Usage
• Create Content
• Encrypt
• PassPhrase Protect
• Binary | Text Encryption
• Share
• Decrypt

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