Pattern: Use of Unicode single quote
Issue: -
Some software, like OS X, Word and WordPress, may automatically replace your regular quotes with slanted Unicode quotes. The shell does not recognize these quotes and will not respect them.
In this case, you have slanted single quotes in a single quoted string. Try deleting and retyping them, and/or disable “smart quotes” in your editor or OS.
Example of incorrect code:
echo 'hello world’Example of correct code:
echo 'hello world'If you want to use literal slanted single quotes for typographic reasons, you can put them in double quotes to make ShellCheck ignore them:
printf "Warning: ‘wakeonlan’ is not installed.\\n"