35 Find Commands

1. Find Files Using Name in Current Directory

Find all the files whose name is tecmint.txt in a current working directory.

# find . -name tecmint.txt

./tecmint.txt

2. Find Files Under Home Directory

Find all the files under /home directory with name tecmint.txt.

# find /home -name tecmint.txt

/home/tecmint.txt

3. Find Files Using Name and Ignoring Case

Find all the files whose name is tecmint.txt and contains both capital and small letters in /home directory.

# find /home -iname tecmint.txt

./tecmint.txt
./Tecmint.txt

4. Find Directories Using Name

Find all directories whose name is Tecmint in / directory.

# find / -type d -name Tecmint

/Tecmint

5. Find PHP Files Using Name

Find all php files whose name is tecmint.php in a current working directory.

# find . -type f -name tecmint.php

./tecmint.php

6. Find all PHP Files in Directory

Find all php files in a directory.

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

./tecmint.php
./login.php
./index.php
Part II – Find Files Based on their Permissions

7. Find Files With 777 Permissions

Find all the files whose permissions are 777.

# find . -type f -perm 0777 -print

8. Find Files Without 777 Permissions

Find all the files without permission 777.

# find / -type f ! -perm 777

9. Find SGID Files with 644 Permissions

Find all the SGID bit files whose permissions set to 644.

# find / -perm 2644

10. Find Sticky Bit Files with 551 Permissions

Find all the Sticky Bit set files whose permission are 551.

# find / -perm 1551

11. Find SUID Files

Find all SUID set files.

# find / -perm /u=s

12. Find SGID Files

Find all SGID set files.

# find / -perm /g+s

13. Find Read Only Files

Find all Read Only files.

# find / -perm /u=r

14. Find Executable Files

Find all Executable files.

# find / -perm /a=x

15. Find Files with 777 Permissions and Chmod to 644

Find all 777 permission files and use chmod command to set permissions to 644.

# find / -type f -perm 0777 -print -exec chmod 644 {} \;

16. Find Directories with 777 Permissions and Chmod to 755

Find all 777 permission directories and use chmod command to set permissions to 755.

# find / -type d -perm 777 -print -exec chmod 755 {} \;

17. Find and remove single File

To find a single file called tecmint.txt and remove it.

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

18. Find and remove Multiple File

To find and remove multiple files such as .mp3 or .txt, then use.

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

OR

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

19. Find all Empty Files

To file all empty files under certain path.

# find /tmp -type f -empty

20. Find all Empty Directories

To file all empty directories under certain path.

# find /tmp -type d -empty

21. File all Hidden Files

To find all hidden files, use below command.

# find /tmp -type f -name ".*"
Part III – Search Files Based On Owners and Groups

22. Find Single File Based on User

To find all or single file called tecmint.txt under /root directory of owner root.

# find / -user root -name tecmint.txt

23. Find all Files Based on User

To find all files that belongs to user Tecmint under /home directory.

# find /home -user tecmint

24. Find all Files Based on Group

To find all files that belongs to group Developer under /home directory.

# find /home -group developer

25. Find Particular Files of User

To find all .txt files of user Tecmint under /home directory.

# find /home -user tecmint -iname "*.txt"
Part IV – Find Files and Directories Based on Date and Time

26. Find Last 50 Days Modified Files

To find all the files which are modified 50 days back.

# find / -mtime 50

27. Find Last 50 Days Accessed Files

To find all the files which are accessed 50 days back.

# find / -atime 50

28. Find Last 50-100 Days Modified Files

To find all the files which are modified more than 50 days back and less than 100 days.

# find / -mtime +50 –mtime -100

29. Find Changed Files in Last 1 Hour

To find all the files which are changed in last 1 hour.

# find / -cmin -60

30. Find Modified Files in Last 1 Hour

To find all the files which are modified in last 1 hour.

# find / -mmin -60

31. Find Accessed Files in Last 1 Hour

To find all the files which are accessed in last 1 hour.

# find / -amin -60
Part V – Find Files and Directories Based on Size

32. Find 50MB Files

To find all 50MB files, use.

# find / -size 50M

33. Find Size between 50MB – 100MB

To find all the files which are greater than 50MB and less than 100MB.

# find / -size +50M -size -100M

34. Find and Delete 100MB Files

To find all 100MB files and delete them using one single command.

# find / -size +100M -exec rm -rf {} \;

35. Find Specific Files and Delete

Find all .mp3 files with more than 10MB and delete them using one single command.

# find / -type f -name *.mp3 -size +10M -exec ls -l {} \;
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Published in: on August 21, 2013 at 10:57 am  Comments Off on 35 Find Commands  

Change Permission for Files and Folders

find /home/*/public_html/ -type d -print0 | xargs -0 chmod 0755 # For directories
find /home/*/public_html/ -type f -not -name “*.pl” -not -name “*.cgi” -not -name “*.sh” -print0 | xargs -0 chmod 0644 # For files
find /home/*/public_html/ -type f -name “*.cgi” -print0 -o -name “*.pl” -print0 -o -name “*.sh” -print0 | xargs -0 chmod 0755 # For CGI/Scripts

Published in: on October 12, 2011 at 9:35 pm  Comments Off on Change Permission for Files and Folders  

Command to grep long sized log files using date format “from” and “to”

grep -r ‘Jul 6*’ maillog > bklog

awk ‘$0>=from&&$0<=to’ from=”Jul  6 20:00:02″ to=”Jul  7 00:00:02″ bklog > bklog5

Published in: on July 7, 2011 at 10:44 am  Comments Off on Command to grep long sized log files using date format “from” and “to”  

How to create MD5 Checksums and validate a file in Linux

how to generate a MD5 Checksum on a file or list of filesa and also how to validate a file against a known MD5 Checksum. For those of you that are not familiar with MD5 Checksums, the purpose is to validate the integrity of a file that may have been corrupted or tampered with. For example, it is possible for file to be corrupted in the process of downloading it from a website or FTP server. In order to verify if it has been corrupted or not, the publisher of the file you downloaded can include a MD5 Checksum (a string of numbers of letters) which is compared to the file you just downloaded. If the two checksums match, that means the files are identical – no corruption has occurred

 

Generate MD5 Checksum on a single file

md5sum filename

Generate MD5 Checksum on multiple files

md5sum filename1 filename2 filename3

Generate MD5 Checksum and ouptut to file

md5sum filename > md5.txt

Compare MD5 Checkum output file to current file in directory

md5sum -c md5.txt

Example of what a MD5 Checksum looks like

d4fdb933151cad1eb58e798d2874f8f6 send_file-1.0.0.7-0.i386.rpm

 

 

 

Published in: on October 27, 2010 at 1:33 pm  Comments Off on How to create MD5 Checksums and validate a file in Linux  

Find Command Utilities

There are couple of things you can try. The find command has a number of options to look for a file based on time. The ‘amin’, ‘cmin’, and ‘mmin’ options will look for files based on the last access time, change time (ie file permissions), and modification time respectively. Use a ‘-‘ to catch things after the specified time. So

Code:
find / -mmin -60
Published in: on October 11, 2010 at 12:09 pm  Comments Off on Find Command Utilities  

How to find a particular word in a file or files in a directory

login to that directory where the word from the files to be searched and type the bellow command ,

example:

 grep -r -w “prioritycalendars.com.” *

Word name = prioritycalendars.com.

*=whole sub directory and files under the main directory

Cheers

siva.d

Published in: on March 10, 2010 at 10:35 pm  Comments Off on How to find a particular word in a file or files in a directory