The find command in Linux is a powerful tool used for searching files and directories based on different criteria such as name, size, type, modification date, permissions, and more. It is one of the most frequently used commands by system administrators and DevOps engineers. Here’s an in-depth look at the top 20 find command examples with detailed explanations.

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1. Find Files by Name

Command:

find /home -name "myfile.txt"

Explanation:
This command searches for a file named myfile.txt inside the /home directory and its subdirectories. The -name option is case-sensitive.

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2. Find Files by Case-Insensitive Name

Command:

find /home -iname "myfile.txt"

Explanation:
Similar to the previous command but with the -iname option, which makes the search case-insensitive. It will find myfile.txt, MYFILE.TXT, MyFile.txt, etc.

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3. Find Directories Instead of Files

Command:

find /var -type d -name "logs"

Explanation:
This command searches for directories named logs inside /var and its subdirectories. The -type d option ensures only directories are matched.

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4. Find Files by Extension

Command:

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

Explanation:
Finds all files inside /var/log that have a .log extension. The -type f ensures that only files are searched.

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5. Find Large Files (More than 100MB)

Command:

find / -type f -size +100M

Explanation:
This finds all files larger than 100MB (+100M) in size across the entire system (/). The -size option supports different units:

• c (bytes)
• k (kilobytes)
• M (megabytes)
• G (gigabytes)

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6. Find Small Files (Less than 1KB)

Command:

find /home -type f -size -1k

Explanation:
Searches for files smaller than 1KB inside /home. The -size -1k means “files less than 1KB.”

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7. Find Files Modified in the Last 7 Days

Command:

find /var/www -type f -mtime -7

Explanation:
Finds files inside /var/www that have been modified in the last 7 days. The -mtime -7 option ensures it fetches files modified within the past week.

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8. Find Files Not Modified in the Last 30 Days

Command:

find /backup -type f -mtime +30

Explanation:
Lists all files in /backup that have not been modified in the last 30 days (+30 means “older than 30 days”).

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9. Find Files Accessed in the Last 24 Hours

Command:

find /etc -type f -atime -1

Explanation:
Finds files inside /etc that were accessed within the last 24 hours (-1 means “within 1 day”).

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10. Find and Delete Files Older than 30 Days

Command:

find /tmp -type f -mtime +30 -exec rm {} \;

Explanation:
This searches for files older than 30 days (-mtime +30) in /tmp and deletes them using -exec rm {}.

⚠️ Warning: Be very careful when using rm with find as it permanently deletes files.

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11. Find Empty Files

Command:

find /home -type f -empty

Explanation:
This finds all empty files (files with 0 bytes) in /home. The -empty flag helps in cleaning up useless files.

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12. Find Empty Directories

Command:

find /var -type d -empty

Explanation:
Finds empty directories inside /var.

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13. Find Files with Specific Permissions (777 – Full Permissions)

Command:

find / -type f -perm 0777

Explanation:
Lists all files with full permissions (rwxrwxrwx). These files are considered security risks.

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14. Find and Change Permissions of Files

Command:

find /var/www -type f -perm 0777 -exec chmod 644 {} \;

Explanation:
Finds files with 777 permissions in /var/www and changes them to 644 (rw-r--r--).

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15. Find Files Owned by a Specific User

Command:

find /home -type f -user myuser

Explanation:
Finds all files inside /home that belong to myuser.

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16. Find Files Owned by a Specific Group

Command:

find /var -type f -group developers

Explanation:
Finds all files in /var that belong to the developers group.

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17. Find Symbolic Links

Command:

find /usr -type l

Explanation:
Lists all symbolic links (-type l) in /usr.

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18. Find Files Excluding a Specific Directory

Command:

find / -path "/proc" -prune -o -type f -name "*.conf" -print

Explanation:
Finds all .conf files but excludes the /proc directory using -prune.

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19. Find and Copy Files to Another Location

Command:

find /home -type f -name "*.jpg" -exec cp {} /backup/photos/ \;

Explanation:
Finds all .jpg files inside /home and copies them to /backup/photos/.

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20. Find and Move Files to Another Directory

Command:

find /downloads -type f -name "*.mp4" -exec mv {} /media/videos/ \;

Explanation:
Finds all .mp4 files inside /downloads and moves them to /media/videos/.

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Final Thoughts

The find command is an essential tool in Linux for searching files and directories efficiently. By combining options like -exec, -prune, and -type, you can filter results based on multiple criteria, automate cleanup tasks, and even manage large file systems effectively.

Would you like me to create a downloadable cheatsheet for this? 🚀