classes.conf - Linux
Overview
classes.conf is a text file used in Linux to define character classes for file name expansion. It allows for fine-grained customization of pattern matching rules when using wildcards such as *
and ?
.
Syntax
/etc/classes.conf
Options/Flags
None.
Examples
Defining a New Character Class
Add the following line to classes.conf:
myclass = abc0123_-
This creates a new character class named myclass that matches any character in the string abc0123_-
.
Using a Character Class in File Name Expansion
To expand all files ending with the defined character class:
ls *.myclass
Common Issues
File not Found
Ensure the classes.conf file exists in /etc
. If it doesn’t, create a new file with write permissions.
Integration
classes.conf interacts with the bash shell. Character classes defined in classes.conf are used for file name expansion in shell scripts and commands.
Related Commands
- wildcards: Expands files based on wildcard patterns
- file: Provides detailed information about files