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diff

file managementLinux/Unix
The diff command is one of the most frequently used commands in Linux/Unix-like operating systems. diff Sample fallback description for diff
See ExamplesView Syntax

Quick Reference

Command Name:

diff

Category:

file management

Platform:

Linux/Unix

Basic Usage:

diff file1.txt file2.txt

Common Use Cases

  • 1

    File comparison

    Compare two files line by line to identify differences

  • 2

    Code review

    Review changes made to source code files

  • 3

    Configuration management

    Track changes to configuration files between versions

  • 4

    Patch creation

    Generate patch files that can be applied to update files

Syntax

diff [OPTION]... [FILE]...

Options

Option Description
-l Use a long listing format
-a Show hidden entries starting with .
-h Human-readable sizes
-R List subdirectories recursively

Examples

How to Use These Examples

The examples below show common ways to use the diff command. Try them in your terminal to see the results. You can copy any example by clicking on the code block.

Basic Examples:

ls
List files in the current directory.
ls -l
List files in long format with details.
ls -a
List all files including hidden ones.

Advanced Examples:

ls -lah Detailed list with human-readable sizes. ls -R List directories recursively.

Try It Yourself

Practice makes perfect! The best way to learn is by trying these examples on your own system with real files.

Understanding Syntax

Pay attention to the syntax coloring: commands, options, and file paths are highlighted differently.

Notes

These are sample notes for the diff command.

Tips & Tricks

1

Use the -r option to compare directories recursively

2

Use the -q option to suppress output and return a non-zero exit status if files differ

3

Use the -s option to report only when files differ

4

Use the -y option to output in a side-by-side format

5

Use the -W width option to set the output width

Common Use Cases

File comparison

Compare two files line by line to identify differences

Code review

Review changes made to source code files

Configuration management

Track changes to configuration files between versions

Patch creation

Generate patch files that can be applied to update files

Quality assurance

Verify if expected changes have been correctly implemented

Related Commands

These commands are frequently used alongside diff or serve similar purposes:

diff3
cmp
comm
colordiff
vimdiff
sdiff
patch
git diff
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Use Cases

1

File comparison

Compare two files line by line to identify differences

2

Code review

Review changes made to source code files

3

Configuration management

Track changes to configuration files between versions

4

Patch creation

Generate patch files that can be applied to update files

5

Quality assurance

Verify if expected changes have been correctly implemented

Learn By Doing

The best way to learn Linux commands is by practicing. Try out these examples in your terminal to build muscle memory and understand how the diff command works in different scenarios.

See ExamplesTry Lab Exercises
$ diff
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