Portable Bash shebang

bash

#!/usr/bin/env bash

Explanation

Common when Bash may not live at /bin/bash.

Learn the surrounding workflow

Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

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Resolve the directory of the current script.

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Implement manual flag parsing in Bash.

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Parse short options using the getopts builtin.

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Drop parsed options after getopts completes.

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Create a secure temporary file.

Print timestamped log lines.