Linux find and locate Commands 

Getting comfortable with the Linux terminal really comes down to how well you can navigate messy directory structures. The Linux find command and Linux locate command are what you'll grab when auditing security permissions, cleaning up log files, or hunting down that configuration script you're pretty sure you saved somewhere. Both help you find files, sure, but they work in totally different ways behind the scenes. 

What Are the Linux find and locate Commands

The Linux find command searches in real time. It actually crawls through your live file system hierarchy looking for files that match whatever criteria you give it—name, size, modification time, whatever. The Linux locate command works differently—it queries a pre-built database. It checks a pre-indexed list of your file system, which means you get results almost instantly, but those results might not show changes that happened ten minutes ago. 

The whole find vs locate Linux debate really comes down to what matters more to you: speed or accuracy. Need the absolute latest data or want to filter by specific metadata? Go with find. Just need to quickly find a file in Linux by name across your entire system? Locate's got you covered. 

How find Works in Real Time

When you run the Linux find command, it kicks off a recursive search starting from wherever you tell it to. To find a file in Linux, this thing talks directly to the VFS (Virtual File System) layer and examines every single inode in the directory tree you specified. Yeah, this hammers your disk I/O pretty hard, but it also means that if someone created a file literally one second ago, your search for how to find files in Linux will catch it. 

How locate Uses a Database

The Linux locate command doesn't touch your hard drive when you execute it. Instead, it reads from a database file, usually sitting at /var/lib/mlocate/mlocate.db. This database gets maintained by the updatedb Linux utility, which typically runs once a day as a cron job. When you use the locate command in Linux, the system just does a quick pattern match against this indexed list. Way faster than find for broad searches, but again, not real-time. 

find vs locate: When to Use Each

Choosing between Linux locate vs find really depends on what you're trying to accomplish: 

Use find when you need to filter by permissions, size, or age; when you want to execute some action on your results; or when you're searching for files created after the last database update ran. 

Use locate when you need results right now, you only remember part of the filename, and you're searching across your entire system instead of drilling into a specific subdirectory. 

Linux find Command Syntax and Options

If you're serious about Linux administration, you need to master the Linux find command syntax. The tool follows a pretty logical structure that lets you get super specific with your filtering. 

Basic find Command Syntax

The standard structure of the find command in Linux looks like this: 

find [path] [expression] [action]

So if you want to search for a file in your current directory: 

find . -name "config.yaml"

When looking at the Linux find command syntax, the dot (.) is your search path, -name is the test expression, and by default, the action is just printing the result to your console. 

find Command Options Reference

Beyond simple name searches, find command options let you pivot based on technical metadata. Some common Linux find command examples include: 

-type: Filter by file, directory, or symbolic link. 

-size: Filter by specific file sizes or ranges. 

-mtime: Filter based on how many days ago the file was last modified. 

-perm: Filter by octal or symbolic permissions. 

How to Find Files by Name in Linux

The most straightforward use case for the Linux find command is searching by filename. 

Case-Sensitive vs Case-Insensitive Search

By default, when you use Linux find by name with the -name flag, it cares about capitalization. If you're not sure how something was capitalized, use Linux find iname instead. This makes your operation to find a file in Linux way more reliable: 

find /etc -iname "NETWORK" will catch "network", "Network", and "NETWORK". 

Search for Multiple Files Using Wildcards

You can use wildcards to broaden your Linux find command examples. To use Linux find file by extension, wrap your pattern in quotes so the shell doesn't expand the wildcard before the command runs: 

find /var/log -name "*.log"

Find and Delete Files by Name

The Linux find and delete workflow is incredibly powerful but also dangerous if you're not careful. Use the -delete flag to remove files matching your criteria: 

find /tmp -name "*.tmp" -delete

Always run the command without -delete first to verify what you're about to nuke before actually executing the removal. 

Find Files by Type, Size and Permissions

Technical audits often need you to search for files meeting specific physical or security criteria. 

Search Files by Type

Using the Linux find file type option, you can restrict results to specific filesystem objects: 

f: Regular file 

d: Directory 

l: Symbolic link 

Running find /home/user -type d will return only directories. 

Search Files by Size

When you're managing disk space, Linux find file by size becomes essential. Use the Linux find by size flags like + for "greater than" or - for "less than": 

find /var -size +100M

This Linux find command helps you identify those massive log files eating up your system resources. 

Find Files by Permissions

To spot security vulnerabilities, use Linux find permissions. You can search for files with exactly 777 permissions: 

find /var/www -perm 777

Find Files by Time and Ownership

Advanced system maintenance means figuring out who owns a file and when it was last touched. 

Using Timestamps to Find Modified Files

The Linux find modified files feature uses -mtime (days) or -mmin (minutes). To find files by date modified in Linux within the last 24 hours: 

find /etc -mtime -1

This is standard Linux find command practice when you're troubleshooting recent system changes. When you need to use Linux find by date, these timestamp options become incredibly valuable for tracking down when things changed. 

Find Files by Owner or Group

If someone leaves your organization, you might need to use Linux find by owner to reassign their stuff. 

find /home -user john_doe

The Linux search file utility will walk through the tree and return every object owned by that specific UID or username. 

Advanced find Command Usage

The real power of the Linux find command shows up when you start processing the files it finds. 

Using find with exec Option

The Linux find exec flag lets you run another command on every file you found. 

find /var/logs -name "*.log" -exec chmod 644 {} \;

In these Linux find command examples, {} is a placeholder for the current file, and \; terminates the command. 

Find Files Using Regex

For complex patterns, Linux find regex gives you regular expression support. 

find . -regex ".*[0-9]\{3\}.txt"

This opens up advanced pattern matching that standard wildcards just can't handle. 

Find Empty Files and Directories

To clean up your filesystem, use: 

find /data -empty

This approach in Linux find command examples helps you identify redundant directories or failed downloads cluttering things up. 

Recursive File Search with find

By default, the Linux find command recursive behavior is already enabled. It'll descend into every subdirectory from your starting path. You can control how deep this Linux search directory goes using the -maxdepth flag: 

find / -maxdepth 2 -name "config*"

Linux locate Command: Syntax and Setup

The Linux locate command is hands down the fastest way to find a file path if you know the name, assuming the database is set up correctly. 

Install the locate Package

Many modern distributions don't include the locate command in Linux by default. On Ubuntu/Debian, install it with: 

sudo apt install mlocate

How to Update the locate Database

Since it relies on an index, you need to run updatedb Linux to reflect recent changes. 

sudo updatedb

If you skip this step, the Linux locate command won't see files created since the last indexing cycle. 

locate Command Syntax

The locate command in Linux syntax is pretty straightforward: 

locate [options] pattern

locate Command Examples

While simpler than find, the Linux locate command still offers several useful flags for refining your output. 

Search for Exact File Name

To avoid getting results for every path containing your string, you can use -r (regex) or specific patterns. But honestly, a standard Linux locate command usually works fine for how to search for files in Linux. 

Count and Limit Search Results

If your search spits out thousands of lines, you can limit the output: 

locate -n 10 backup.tar.gz

Or just count the matches: 

locate -c .conf

Ignore Case Sensitivity with locate

Similar to find, use the -i flag with the Linux locate command: 

locate -i README

Show Only Existing Files

If files were deleted but the database hasn't updated yet, locate will return "ghost" paths. Use -e to check if the file actually still exists on disk: 

locate -e myoldscript.sh

FAQ: Linux find and locate Commands