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Bash Shell Scripting Summary & Certification Exam
Earn your official Linux Shell Scripting & DevOps Specialist Certificate
Prove your command-line automation and DevOps proficiency: shebangs, quoting, positional parameters, exit codes, conditionals, loops, functions, I/O redirection, and strict mode defensive scripting.
Core Bash Competencies Tested
Shebang line and executable file permissions.
Double quotes vs single quotes and command substitution.
Special variables: $0, $1, $#, and exit status $?.
Conditionals with [[ ... ]] and file test operators.
Safe file iteration with while read -r line.
Local function scoping and 2>&1 stream redirection.
Strict defensive scripting with set -euo pipefail.
Set your Publisher ID in src/config/ads.ts to display live ads.
Test Yourself With Exercise
What does an exit code of `0` in `$?` signify after a command has run?