EEdukron DevOps Library
AutomationFoundation13 submodules

Bash Scripting and Automation

Use Bash to turn reliable Linux commands into repeatable operational and pipeline automation with clear inputs, validation, logging, and failure handling.

How this module works

From concept to production evidence

Design scripts as small programs: validate arguments, quote data, make actions idempotent, capture exit codes, emit useful logs, and fail safely when an assumption is not met.

Learning outcomes

  • Write predictable Bash control flow
  • Process files and command streams
  • Use grep, awk, and sed appropriately
  • Handle errors and exit codes
  • Build reusable automation scripts

Flow diagram

Bash Scripting and Automation end-to-end flow

Use this sequence as the operating backbone for every submodule note and hands-on exercise.

  1. 01
    Receive inputsBash Scripting and Automation stage 1: receive inputs with an auditable result before the next stage begins.
  2. 02
    Validate assumptionsBash Scripting and Automation stage 2: validate assumptions with an auditable result before the next stage begins.
  3. 03
    Transform dataBash Scripting and Automation stage 3: transform data with an auditable result before the next stage begins.
  4. 04
    Execute actionBash Scripting and Automation stage 4: execute action with an auditable result before the next stage begins.
  5. 05
    Handle failureBash Scripting and Automation stage 5: handle failure with an auditable result before the next stage begins.
  6. 06
    Report resultBash Scripting and Automation stage 6: report result with an auditable result before the next stage begins.

Integrated hands-on lab

Create a production-ready health-check script

  1. Accept service and threshold arguments
  2. Validate inputs
  3. Collect process, disk, and endpoint data
  4. Return meaningful exit codes
  5. Schedule and log the check

Complete module contents

13 full submodule notes

Read in order
01

Bash fundamentals

Bash fundamentals provides a concrete platform capability that must be configured, secured, validated, observed, and owned throughout its lifecycle within Bash Scripting and Automation. It is not an isolated definition: its value appears when it supports design scripts as small programs: validate arguments, quote data, make actions idempotent, capture exit codes, emit useful logs, and fail safely when an assumption is not met.

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02

Variables

Variables turns a manual or repeated decision into versioned, parameterized, testable, and observable execution within Bash Scripting and Automation. It is not an isolated definition: its value appears when it supports design scripts as small programs: validate arguments, quote data, make actions idempotent, capture exit codes, emit useful logs, and fail safely when an assumption is not met.

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03

Arguments

Arguments provides a concrete platform capability that must be configured, secured, validated, observed, and owned throughout its lifecycle within Bash Scripting and Automation. It is not an isolated definition: its value appears when it supports design scripts as small programs: validate arguments, quote data, make actions idempotent, capture exit codes, emit useful logs, and fail safely when an assumption is not met.

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04

Operators

Operators provides a concrete platform capability that must be configured, secured, validated, observed, and owned throughout its lifecycle within Bash Scripting and Automation. It is not an isolated definition: its value appears when it supports design scripts as small programs: validate arguments, quote data, make actions idempotent, capture exit codes, emit useful logs, and fail safely when an assumption is not met.

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05

Conditions

Conditions turns a manual or repeated decision into versioned, parameterized, testable, and observable execution within Bash Scripting and Automation. It is not an isolated definition: its value appears when it supports design scripts as small programs: validate arguments, quote data, make actions idempotent, capture exit codes, emit useful logs, and fail safely when an assumption is not met.

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06

Loops

Loops turns a manual or repeated decision into versioned, parameterized, testable, and observable execution within Bash Scripting and Automation. It is not an isolated definition: its value appears when it supports design scripts as small programs: validate arguments, quote data, make actions idempotent, capture exit codes, emit useful logs, and fail safely when an assumption is not met.

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07

Functions

Functions turns a manual or repeated decision into versioned, parameterized, testable, and observable execution within Bash Scripting and Automation. It is not an isolated definition: its value appears when it supports design scripts as small programs: validate arguments, quote data, make actions idempotent, capture exit codes, emit useful logs, and fail safely when an assumption is not met.

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08

Arrays

Arrays provides a concrete platform capability that must be configured, secured, validated, observed, and owned throughout its lifecycle within Bash Scripting and Automation. It is not an isolated definition: its value appears when it supports design scripts as small programs: validate arguments, quote data, make actions idempotent, capture exit codes, emit useful logs, and fail safely when an assumption is not met.

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09

File handling

File handling preserves durable information with explicit ownership, consistency, access, lifecycle, replication, and recovery guarantees within Bash Scripting and Automation. It is not an isolated definition: its value appears when it supports design scripts as small programs: validate arguments, quote data, make actions idempotent, capture exit codes, emit useful logs, and fail safely when an assumption is not met.

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10

Pipes & redirection

Pipes & redirection governs how a request is named, addressed, routed, filtered, transported, protected, and delivered to a healthy endpoint within Bash Scripting and Automation. It is not an isolated definition: its value appears when it supports design scripts as small programs: validate arguments, quote data, make actions idempotent, capture exit codes, emit useful logs, and fail safely when an assumption is not met.

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11

grep, awk, sed

grep, awk, sed provides a concrete platform capability that must be configured, secured, validated, observed, and owned throughout its lifecycle within Bash Scripting and Automation. It is not an isolated definition: its value appears when it supports design scripts as small programs: validate arguments, quote data, make actions idempotent, capture exit codes, emit useful logs, and fail safely when an assumption is not met.

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12

Error handling

Error handling restores a safe service state while preserving evidence and reducing the chance that mitigation introduces a second failure within Bash Scripting and Automation. It is not an isolated definition: its value appears when it supports design scripts as small programs: validate arguments, quote data, make actions idempotent, capture exit codes, emit useful logs, and fail safely when an assumption is not met.

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13

Automation scripts

Automation scripts governs how a request is named, addressed, routed, filtered, transported, protected, and delivered to a healthy endpoint within Bash Scripting and Automation. It is not an isolated definition: its value appears when it supports design scripts as small programs: validate arguments, quote data, make actions idempotent, capture exit codes, emit useful logs, and fail safely when an assumption is not met.

Open full notes