How to use 'find' - A powerful command ?

Find all the files in /home with name hello.txt.

find /home –name hello.txt

Find the files with name hello.txt and in present working directory

find . –name hello.txt

OR

find –name hello.txt

Find all the files with name hello.txt but ignoring the case of file names.

find /home –iname hello.txt

-iname option is used to mention ignore the case sensitivity of a file.

Search for files depending on their File types

Search for only directories whose name is var in / directory

find / -type d –name var

Search for an mp3 files whose name is nagada.mp3

find / -type f –name nagada.mp3

FILE TYPES :

f     Regular file

d     Directory file

b     Block file

c     Character file

p     Pipe file

l     Symbolic link file

s     Socket file

Search for a file name hello.txt and its permissions are 775

find / -perm 775 –name hello.txt

Searching files with SUID bit set and file permissions are 755

find / -perm 4755

Find SGID bit set files with 644 permissions

find / -perm 2644

Find Sticky bit set files in my system with permissions 551

find / -perm 1551

Search for all the files whose SUID bit is set

find / -perm /u=s

Search for all the files whose SGID bit is set

find / -perm /g+s

Note: We can use = or + interchangeably to check if a permissions is set or not.

Search for all the files  whose StickyBit is set

find / -perm /o=t

Search for all the files whose owner permissions is read only.

find / -perm /u=r

Search for all the files which have user, group and others with executable permissions

find / -perm /a=x

Search for all the files with name hello.txt and the owner of this file is Shaan

find / -user Shaan –name hello.txt

Find all the files whos name is hello.txt and owned by a group called admplat

find / -group admplat –name hello.txt

Search by Modified date and time

Search for a file hello.txt whose file status is changed more than 90 days back

find / -ctime +90 –name hello.txt

Search for all the files which are modified exactly 90 days back

find / -mtime 90

Search for all the files with name test.txt which is accessed less than 90 days

find / -atime -90

Find all the files which are modified more than 90 days back and less than 180 days

find / -mtime +90 –mtime -180

Find all the files changed less than 30 mins

find / -cmin -30

Find all the files modified exactly 30 mins back

find / -mmin 30

Find all the files accessed more than 30 mins back

find / -amin +30

Find all the files which are modified more than 5mins back and less than 25 mins

find / -mmin +5 –mmin -25

Get all the files which are created later to a file created

find / -newer test.txt

Search for files/folders by size

Search for files whose size is more than 10 bytes

find / -size +10c

Search for files which are exactly 10 kb in /opt folder

find /opt –size 10k

Search for files which are less than 10MB in /var folder

find /var –size -10M

Search for files which are more than 1GB size in /usr folder

find /usr –size +1G

Find all the empty files in my system

find / -size 0k