LinuxCBT BASH II Edition

 Bourne Again Shell (BASH) Scripting II

INIT & Cron Scripts
Identify features & characteristics
Parse INIT & Cron scripts
Explore variables & function references
Evaluate system applicability

Command Line Interface (CLI) Arguments
Explain features
Explore defaults
Pass arguments and evaluate interpolation
Expose CLI argument counter
Ensure appropriate CLI arguments upon invocation

Find Failed Logins
Auto-generate requisite directory structure
Identify relevant logs
Default searched user
Integrate ‘awk’ & ‘sed’ accordingly
Correlate search string with defined user

Core Dump Removal Simulation
Generate core dumps in disparate file system locations
Invoke simultaneous logs of activity
Qualify references
Mail process results

Storage Availability Stub
Discuss relevance
Integrate ‘df’, ‘awk’, & ‘grep’
Parse interesting output
Compare derivation with defined thresholds

Check Remote Service
Explain objective
Identify remote service
Integrate SSH
Trap service status accordingly
Loop variable hosts
Debug appropriately

Backup Snapshots
Identify need
Integrate storage availability stub
Enlist ‘tar’ & ‘bzip2’
Flex script to handle differential snapshots
Vary snapshot by day
Tidy remnants
Extend process to encrypt snapshots

Error-Handling
Restructure process to handle errors
Except positive & negative results
Define appropriate functions
Promulgate function references
Test efficacy

Free Memory & Swap
Define reusable stub
Integrate with existing processes
Vary thresholds
Execute and evalute

Logger Stub
Reveal usefulness
Define and contain parameters in a function
Integrate function accordingly

Checksum Generator
Identify objective
Integrate CLI ARGS stub
Integrate logger stub
Generate desired checksums for variable content

Purge History
Justify applicability
Explore history environment
Ensure history management across shell invocations

Monitor Page Loads
Explain scenario
Integrate ‘wget’
Define thresholds
Code appropriate traps
Average page loads over time
Evaluate results
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