Regex pattern for lowercase alphanumeric, hyphen and dot

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I am currently working on a bash script and I need a regex that allows only lowercase alphanumeric, hyphen and dots.

Please help me!

What I have tried:

So far, I have tried this:

Bash

"[a-z-]+"

Posted 4-Sep-23 2:02am

ColdSnus

Updated 10-Sep-23 3:18am

Deeksha Shenoy

v2

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Richard MacCutchan · Answer 1 · 2023-09-04T02:21:00

Solution 1

Try this one:

[a-z\-\.]+

You can test regexes online at https://regexr.com[^]

Posted 4-Sep-23 2:21am

Richard MacCutchan

Patrice T · Answer 2 · 2023-09-04T13:07:00

Quote:
regex that allow only lowercase alphanumeric,

I would try domething like:

[a-z0-9\-\.]+

Just a few interesting links to help building and debugging RegEx.
Here is a link to RegEx documentation:
perlre - perldoc.perl.org[^]
Here is links to tools to help build RegEx and debug them:
.NET Regex Tester - Regex Storm[^]
Expresso Regular Expression Tool[^]
RegExr: Learn, Build, & Test RegEx[^]
Online regex tester and debugger: PHP, PCRE, Python, Golang and JavaScript[^]
This one show you the RegEx as a nice graph which is really helpful to understand what is doing a RegEx: Debuggex: Online visual regex tester. JavaScript, Python, and PCRE.[^]
This site also show the Regex in a nice graph but can't test what match the RegEx: Regexper[^]