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bongoDev | Shell Scripting - Knowledge Hub

Knowledge Hub/Shell Scripting

Englishবাংলা

Learning path

Shell Scripting

Master production-ready Bash automation for DevOps and SRE: safe scripting, variables, arguments, logic, loops, functions, pipelines, traps, validation, testing, CI/CD, security, cheatsheet, and troubleshooting.

Discount price

৳ 320.00৳ 120.00Save ৳ 200.00

Lessons

22 published lessons · 1 free preview

01Shell, Bash & the Execution ModelUnderstand what a shell is, where Bash fits, how commands are parsed and executed, and why shell scripting matters for DevOps automation.Beginner · 10 min readFree previewFree preview
02Shebangs, Executable Scripts & CommentsLearn shebang behavior, direct execution, executable permissions, comments, and interpreter portability.Beginner · 9 min readLockedLocked
03Variables, Quoting & Parameter ExpansionMaster safe variable assignment, quoting, environment variables, defaults, string operations, and parameter expansion.Beginner · 13 min readLockedLocked
04Safe Scripts: Exit Codes, Strict Mode & Error SemanticsUse exit status, errexit, nounset, pipefail, guards, and explicit error handling without misunderstanding strict mode.Intermediate · 15 min readLockedLocked
05Input, Positional Parameters & CLI Argument ParsingHandle user input, $1/$@/$#, case statements, flags, validation, and predictable command-line interfaces.Intermediate · 14 min readLockedLocked
06Conditionals, Tests & System DecisionsWrite reliable if/elif/else and case logic for files, strings, numbers, commands, and production state checks.Beginner · 12 min readLockedLocked
07Loops, Iteration & Safe Batch OperationsUse for, while, until, read loops, break/continue, and null-safe file iteration without destructive word-splitting bugs.Intermediate · 14 min readLockedLocked
08Arrays, Associative Arrays & Structured ListsUse indexed and associative arrays to avoid fragile string lists and keep operational data structured.Intermediate · 11 min readLockedLocked
09Functions, Scope, Arguments & Return ValuesBuild modular functions with local variables, positional parameters, exit-status returns, and captured stdout.Intermediate · 15 min readLockedLocked
10Pipes, Redirection, Command & Process SubstitutionConnect commands safely using pipes, stdout/stderr redirection, heredocs, command substitution, and process substitution.Intermediate · 15 min readLockedLocked
11Text Processing for Automation: grep, awk, sed, find & xargsTurn the PDF cheatsheet tools into safe automation patterns for logs, files, configuration, and command output.Intermediate · 16 min readLockedLocked
12Temporary Files, Traps, Signals & CleanupPrevent stale files and partial operations with mktemp, traps, signals, cleanup functions, and lock handling.Intermediate · 14 min readLockedLocked
13Defensive Automation: Validation, Idempotency, Dry Run & RetriesDesign scripts that are safe to rerun, validate preconditions, support dry-run, and retry only transient failures.Advanced · 17 min readLockedLocked
14Logging, Diagnostics & Observable ScriptsCreate useful logs with timestamps, severity, stderr discipline, trace IDs, and optional debug modes.Intermediate · 13 min readLockedLocked
15System & Network Automation Health ChecksTurn systemctl, sockets, DNS, HTTP, memory, disk, and process checks into reliable operational scripts.Intermediate · 15 min readLockedLocked
16Production Script Architecture & Main Function BlueprintStructure maintainable Bash with metadata, strict settings, constants, functions, validation, main, and explicit execution flow.Advanced · 15 min readLockedLocked
17ShellCheck, shfmt, Syntax Validation & TestsCatch bugs before production with bash -n, ShellCheck, formatting, smoke tests, Bats-style tests, and CI gates.Advanced · 14 min readLockedLocked
18Security, Secrets & Dangerous Command BoundariesProtect credentials, quote inputs, prevent injection, use least privilege, and harden destructive automation.Advanced · 16 min readLockedLocked
19Concurrency, Background Jobs & TimeoutsUse background jobs, wait, bounded parallelism, locks, timeouts, and cleanup without creating race conditions.Advanced · 14 min readLockedLocked
20Running Shell Automation in CI/CD, cron & systemdDesign scripts for non-interactive runners, predictable environments, schedulers, service units, and deployment pipelines.Advanced · 15 min readLockedLocked
21Shell Scripting CheatsheetA high-utility Bash reference for variables, tests, loops, functions, arguments, safety, text processing, traps, diagnostics, and validation.Intermediate · 18 min readLockedLocked
22Shell Script Debugging & Troubleshooting PlaybookSystematically debug syntax failures, quoting bugs, strict-mode surprises, pipelines, functions, subprocesses, CI differences, permissions, and flaky automation.Advanced · 23 min readLockedLocked