What is the regex for absolute unix path?

The regex pattern for absolute unix path is `^\/(?:[^\/\0]+\/)*[^\/\0]*$`. This pattern validates absolute filesystem path starting with /.

How do I use this regex in JavaScript?

In JavaScript, create the regex with `const regex = /^\\/(?:[^\\/\0]+\\/)*[^\\/\0]*$/;` and test with `regex.test(yourValue)`. It returns `true` if the value matches.

How do I use this regex in Python?

In Python, use `import re; re.match(r'^\/(?:[^\/\0]+\/)*[^\/\0]*$', value)`. The raw string prefix (`r`) prevents Python from interpreting backslashes as escape characters.

Is this regex case-sensitive?

By default, yes. To make it case-insensitive, add the `i` flag in JavaScript (`/^\/(?:[^\/\0]+\/)*[^\/\0]*$/i`) or use `re.IGNORECASE` in Python.

Regex for Absolute Unix Path

Regex Pattern

^\/(?:[^\/\0]+\/)*[^\/\0]*$

Absolute filesystem path starting with /

Quick Answer

The regex pattern for absolute unix path is `^\/(?:[^\/\0]+\/)*[^\/\0]*$`. Absolute filesystem path starting with /. This works in JavaScript, Python, Ruby, PHP, Java, and most regex engines that support PCRE syntax.

Test Examples

Input	Result
/home/user/file.txt	✓ Matches
/var/log/syslog	✓ Matches
/	✓ Matches
relative/path	✗ No match
C:\\Windows	✗ No match
../parent	✗ No match

Code Examples

javascript

const regex = /^\\/(?:[^\\/\0]+\\/)*[^\\/\0]*$/;
const isValid = regex.test(value);

python

import re
pattern = r'^\/(?:[^\/\0]+\/)*[^\/\0]*$'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /^\/(?:[^\/\0]+\/)*[^\/\0]*$/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/^\\/(?:[^\\/\0]+\\/)*[^\\/\0]*$/', $value)) {
    echo "valid";
}

java

String pattern = "^\\/(?:[^\\/\\0]+\\/)*[^\\/\\0]*$";
boolean isValid = value.matches(pattern);

Frequently Asked Questions

Related Regex Patterns

File Extension

File extension at the end of a filename

Image File Extension

Common image file extensions

Video File Extension

Common video file extensions

Windows File Path

Windows absolute file path (C:\folder\file.txt)

Unix File Path

Unix absolute file path (must have at least one path component)

Filename with Extension

Filename with at least one extension