Shell Check

Use shellcheck to analyze shell scripts for syntax errors, semantic problems, and style issues.

Usage

To check a single script:

shellcheck script.sh

To check all shell scripts in the current directory:

shellcheck *.sh

To check scripts recursively:

find . -name '*.sh' -exec shellcheck {} +

Common Options

• -e CODE — exclude a specific warning (e.g. shellcheck -e SC2086 script.sh)
• -s SHELL — specify the shell dialect (bash, sh, dash, ksh)
• -f FORMAT — output format (tty, json, gcc, diff)