2️⃣find command

Syntax - find [options] [path…] [expression]

1. Search file based on their size

 find /path/ -size 50M 

• M for MB

• k for KB

• G for GB

• c for bytes

2. Find a filetype in a given path

find /path/ -type f

• f for file

• d for directory

• l for symbolic link

• b for block device

• s for socket

3. Ignore upper and lowercase in file name while searching files

find /path/ -iname <file_name>

4. Search files for a given user only

find /path/ -user root

5. Search a file based on their permissions

find /path/ -perm /u=r 
find /path/ -perm 777

6. Search all files that start with letter `a`

find /path/ -iname a*

7. Search all files which are modified/created after last.txt file

find /path/ -newer last.txt

8. Search all empty files in a directory

find /path/ -empty

9. Find and delete empty files

find /path/ -empty -delete

10. Search all files whose size are between 1-50MB

find /path/ -size +1M -size -50M

11. Search 15 days old files

find /path/ -mtime 15