Regular Expressions for file name matching

Question

In Bash, how does one match a regular expression with multiple criteria against a file name? For example, I\'d like to match against all the files with .txt or .log endings.

Answer 1

You can also do this:

shopt -s extglob
for file in *.+(log|txt)

which could be easily extended to more alternatives:

for file in *.+(log|txt|mp3|gif|foo)