basename Command in Linux

The basename command in Linux is used to extract the file name from a full path by removing the directory path and optional suffix. It is commonly used in shell scripting and file handling to work only with the filename instead of the complete path.

• Used to extract filename from a full path
• Can remove file extensions (suffix)
• Helpful in automation and scripting
• Available in most Linux distributions as part of GNU coreutils.

Example 1: To extract the file name.

The basename command extracts only the filename from a full file path.

Syntax:

basename /home/user/filename.txt

Example 2: To extract the file name without the suffix.

In case you want to strip off the suffix of a file, this command removes the specified suffix (such as a file extension) from the filename.

Syntax:

basename /home/user/filename.txt .txt

Syntax of the 'basename' command.

basename [path] [suffix]

• Path: Full path of the file or directory.
• Suffix: Suffix refers to a specific string (usually a file extension) that you want to remove from the end of the filename.

Options for `basename` Command

The basename command in Linux provides a few useful options, mainly available in the GNU coreutils version. These options make it easier to handle multiple paths, remove suffixes, and control output formatting.

Syntax:

basename [options] file_path [suffix_to_remove]

• [options] : Optional flags used with the command.
• file_path : Full path or name of the file.
• [suffix_to_remove] : Optional extension or text you want to remove from the filename.

Option 1. '-a, - -multiple':

The -a option allows basename to process multiple files or paths at once. Each given path is treated separately, and only filenames are printed.

Syntax:

basename -a /path/filename1.txt /anotherpath/filename2.log

Option 2.'-s, - -suffix = SUFFIX'

The -s option removes a specified suffix (like file extension) from the filename output.

Syntax:

basename -s .log /path/filename.log

Option 3. '-z' option:

The -z option prints the output separated by a NULL character instead of a newline. It is mainly used in scripting.

Syntax:

basename -z /path/filename.txt

Option 4. '--help':

Displays help information about the basename command and available options.

Syntax:

basename --help

Option 5: '--version'

It shows the version information of the basename command.

Syntax:

basename --version

Real-World Usage of `basename` Command

The basename command is widely used in shell scripting, automation tasks, and file handling. Below are some common practical scenarios.

1. Using basename in Shell Scripts

Many shell scripts use basename to extract only the filename from a full path.

file="/home/user/script.sh"
basename "$file"

Output :

script.sh

2. Removing File Extension

Useful when only the file name is required without its extension.

basename report.pdf .pdf

Output :

report

3. Handling Multiple Files

When working with many files, basename helps extract names quickly, especially with the -a option.

basename -a /home/user/a.txt /home/user/b.log

Output :

a.txt
b.log