LinuxCBT Ubu14x Edition

Course Objective

Features | Installation | Deployment
– Discuss important features | attributes
– Obtain platform images
– Provision GUESTs on Hypervisor
– Perform server installation
– Clone server install
– Effect changes to cloned instance
– Confirm functionality of GUESTs

Post-Installation Exploration
– Explain typical boot sequence
– Discuss System V Runlevels
– Peruse Upstart Environment
– Identify key steps
– Evaluate results

Basic Linux | Unix Commands
– ls, pwd, cd, cp, mv, rm, mkdir, rmdir, whoami
– alias, cat, file, chmod, chown, history, dd, blkid, lspci
– STDIN | STDOUT, UNIX Pipes, Redirection, Command Chaining
– ps, df, top, pagers
– head, tail, which, w, who, sudo, su, wall
– tar, gzip, bzip2

Common Tools | Files
– Discuss various relevant client utilities
– Networking: ping, netstat, mtr, telnet
– File Retrieval: Use WGET | Curl | LFTP to retrieve content
– Name Resolvers: host, nslookup, dig, /etc/hosts
– Checksum various content
– Explore Time Administration
– Replace ‘ntpd’ with ‘chronyd’
– Discuss applicability

LSOF
– Use ‘lsof’ to expose file | socket usage
– Use lsof to identify various resources
– Discuss general usage | applicability

Secure Shell (SSH)
– Introduce default implementation
– Discuss TTY assignments
– Generate SSH PKI Usage Keys
– Migrate to PKI (Passwordless) AUTH
– Non-interactively transport content with SCP
– Interactively move content with SFTP
– Discuss enhanced ‘root’ configuration
– Ensure consistent PKI deployment

Screen | Perpetual TTYs
– Discuss caveats of default $SHELL access
– Spawn ‘screen’ instances
– Navigate ‘screen’ instances
– Detatch | Re-attach | Share ‘screen’ resources
– Spawn | Terminate ‘screen’ instances as desired

File Permissions | User Management
– Explain standard Linux (DAC) permissions
– Alter permissions as needed
– Test access to content
– 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
– Mount | Test | Committ to: /etc/fstab
– 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

Package Management
– Identify key ‘dpkg’ | ‘apt-get’ | ‘aptitude’ features
– Enumerate stock package-set
– Update current packages
– Install and confirm packages as desired

SYSLOG Configuration
– Explore default configuration
– Discuss Syslog Rules
– Except facilities from catchall: /var/log/syslog
– Explore key logs

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

IP Administration
– Expose Installed configuration
– Identify available tools | configuration
– Create interface aliases (sub-interfaces)
– Test communications | Ensure persistence
– Add IP ROUTE to access remote subnet
– Test routing
– Confirm persistence

DNS | DHCPD Implementation
– Discuss features and benefits
– Implement DNS Caching-Only services
– Explore default configuration
– Resolve recursively as needed
– Setup Primary DNS zone
– Replicate to Secondary DNS server
– Alter zone | Test replication
– Implement DHCP Server
– Dedicate VLAN | Test address assignment

Apache HTTPD Server
– Identify key Apache features
– Explore default environment
– Examine Apache logs configuration
– Provision IP-based Virtual Hosts
– Provision Name-based Virtual Hosts
– Ensure distinct logs
– Test Virtual Host connectivity
– Implement Apache SSL

Apache SSL Configuration
– Identify key Files and Tools
– Invoke default SSL configuration and evaluate
– Generate certificates for default instance
– Generate certs for virtual hosts and apply
– Test secure connectivity

Network Reconnaissance
– Install NMap
– Explore footprint
– Perform local reconnaissance
– Quickly identify available subnet-based nodes
– Comprehensive scan of select targets
– Examine log and identify weakspots
– Evaluate results

Packet Capturing
– Explore ‘tcpdump’ basics
– Capture wide variety of packets
– Use BPFs to reduce captured data
– Replay captures with ‘tcpdump’
– Parse with BPFs as desired
– Parse captures with WireShark

Rescue /boot
– Unable to update key packages
– Kernel | INITRD | etc.
– Provision new Block Storage
– Enter Single-User Mode
– Synch /boot content
– Confirm all is well

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