I recently came across this # -*- sh -*- at the top of a file with aliases in them. It was part of someone's dotfiles inside their bash directory and, until now, I've never seen it before. So, what is this and how is it different than using a shebang? I tried googling alternatives to a shebang, but came up with nothing that gives me a hint as to what the above is. 
Bash Aliases and Dotfiles
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Related Questions in DOTFILES
- Borrow mutable and immutable reference in the same block
- Linking to a static lib compiled with MSVC
- Using a no-method trait implementation in a different module
- No error for two traits implementing the same method
- How are the generic functions and types stored in an rlib?
- Is it possible to find an element in a Vec<T> and remove it?
- What does & actually do?
- unresolved name rand::thread_rng
- Use of undeclared type that is defined in another file
- Creating byte buffers in rust
Related Questions in ALIASES
- Borrow mutable and immutable reference in the same block
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- How are the generic functions and types stored in an rlib?
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- What does & actually do?
- unresolved name rand::thread_rng
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Files with alias definitions do not need shebang lines, because executing them stand-alone would not add the definitions to the current shell, which is the point of alias definitions.
Instead, files with alias definitions must be sourced (run in the context of the current shell, with
sourceor.).Thus, what you're seeing is just an ordinary comment that indicates what specific shell (
sh) the file is designed to be sourced from.