Regular expressions (Bash)

To use regular expressions in Bash comparisons, use operator =~, like

if [[ "$switches" =~ [f] ]]; then
	echo "f - Create folder structure"
	mappenstructuur=true
fi

I have the impression that regular expressions (regex) in Bash may not be the same as in MySQL, hence some more details in this article.

See also

• String comparison (Bash)
• Regex (MySQL)

Sources

• https://www.networkworld.com/article/2693361/operating-systems/unix-tip-using-bash-s-regular-expressions.html