[[ 3 –gt 2 ]] # Uses unicode en-dash character
[[ 3 -gt 2 ]] # Uses regular ASCII hyphen-minus character
A character that looks similar to
- has made its way into your code. This is usually due to copy-pasting from blogs and other websites that formatted code as text, replacing the ASCII hyphen-minus with a Unicode dash character.
To fix it, simply delete and retype it.
For a large script, you can use your editor's Search&Replace by copy-pasting the bad dash.
None. If you want a literal Unicode dash character, just quote it.
ShellCheck is a static analysis tool for shell scripts. This page is part of its documentation.