The Linux find command is one of the most important and commonly used command line applications in Unix-like operating systems. The find command is used to search for and locate files and directories that match the specified parameters. The find command provides a variety of options that users can use under different conditions. You can search for files based on different criteria, such as permissions, users, groups, file type, date, size, and other parameters.

To find a file with a specific name, find all files named tecmint.txt in your current working directory:

# find . -name tecmint.txt

./tecmint.txt

Find all the files named tecmint.txt in the /home directory.

# find /home -name tecmint.txt

/home/tecmint.txt

Look in the /home directory for all files named tecmint.txt that contain upper and lower case letters.

# find /home -iname tecmint.txt

./tecmint.txt

./Tecmint.txt

Find all directories named Tecmint in the/directory.

# find / -type d -name Tecmint

/Tecmint

Find all the php files named tecmint.php.

# find . -type f -name tecmint.php

./tecmint.php

Find all php files in the directory.

# find . -type f -name "*.php"

./tecmint.php

./login.php

./index.php

Find all files with permission 666.

# find . -type f -perm 0666 -print

Find all 666 files without permissions:

# find / -type f !  -perm 777

Finds all SGID bit files with permission set to 644.

# find / -perm 2644

To find a Sticky Bit file with 551 permissions:

# find / -perm 1551

Find all SUID Settings files.

# find / -perm /u=s

Finds all SGID set files.

# find / -perm /g=s

Find read-only files:

# find / -perm /u=r

Find all executable files:

# find / -perm /a=x

Find all 666 permission files and use the chmod command to set the permission to 644.

# find / -type f -perm 0666 -print -exec chmod 644 {} \;

Find all 666 permissions directories and use the chmod command to set permissions to 755.

# find / -type d -perm 666 -print -exec chmod 755 {} \;

Find a file named tecmint.txt and delete it.

# find . -type f -name "tecmint.txt" -exec rm -f {} \;

To find and delete multiple files (such as.mp3 or.txt), use.

# find . -type f -name "*.txt" -exec rm -f {} \;

OR

# find . -type f -name "*.mp3" -exec rm -f {} \;

Find all empty files in a path:

# find /tmp -type f -empty

Archive all empty directories in a path.

# find /tmp -type d -empty

To find all hidden files, use the following command.

# find /tmp -type f -name ".*"