Find Files Using
Name/permission/modifiedtime/type in
Current Directory/internal direcory
from current directory or from a
specific directory.
Try these combinations to get all the
answers.
[user02@localhost mnz14]$ find -name *.cpp
./gdb_2014_cs/w.cpp
./ds/queueLinkedList.cpp
./ds/zerotoendofarray.cpp
./ds/queueArray.cpp
[user02@localhost mnz14]$ find -name
*que*.cpp
./ds/queueLinkedList.cpp
./ds/queueArray.cpp
[user02@localhost mnz14]$ grep -r *.cpp
[user02@localhost mnz14]$ grep -r *.cpp *
[user02@localhost mnz14]$ grep -r "iostream"
[user02@localhost mnz14]$ grep -r "iostream" *.cpp
grep: *.cpp: No such file or directory
[user02@localhost mnz14]$ grep -r "iostream" *
ds/queueLinkedList.cpp:#include<iostream>
ds/zerotoendofarray.cpp:#include<iostream>
ds/queueArray.cpp:#include<iostream>
gdb_2014_cs/w.cpp:#include<iostream>
-------------------
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 rm {} \;
---------------
Search a string Recursively in all Directories
If you would like to search for a string in the current directory
along with all of the subdirectories, you can specify the -r option to
search recursively:
#grep -r "main" *
#grep -r main *
1. Search and Find Files
Let's say that you have just installed a fresh copy of the new Ubuntu
on your machine, and that you are going to give Python scripting a
shot. You have been scouring the web looking for tutorials, but you
see that there are two different versions of Python in use, and you
don't know which one was installed on your system by the Ubuntu
installer, or if it installed any modules. Simply run this command:
# dpkg -l | grep -i python
Sample Output
ii python2.7 2.7.3-0ubuntu3.4
Interactive high-level object-oriented language (version 2.7)
ii python2.7-minimal 2.7.3-0ubuntu3.4
Minimal subset of the Python language (version 2.7)
ii python-openssl 0.12-1ubuntu2.1
Python wrapper around the OpenSSL library
ii python-pam 0.4.2-12.2ubuntu4
A Python interface to the PAM library
First, we ran dpkg -l, which lists installed *.deb packages on your
system. Second, we piped that output to grep -i python, which simple
states "go to grep and filter out and return everything with 'python'
in it." The -i option is there to ignore-case, as grep is
case-sensitive. Using the -i option is a good habit of getting into,
unless of course you are trying to nail down a more specific search.
2. Search and Filter Files
The grep can also be used to search and filter within individual files
or multiple files. Lets take this scenario:
You are having some trouble with your Apache Web Server, and you have
reached out to one of the many awesome forums on the net asking for
some help. The kind soul who replies to you has asked you to post the
contents of your /etc/apache2/sites-available/default-ssl file.
Wouldn't it be easier for you, the guy helping you, and everyone
reading it, if you could remove all of the commented lines? Well you
can! Just run this:
# grep -v "#" /etc/apache2/sites-available/default-ssl
The -v option tells grep to invert its output, meaning that instead of
printing matching lines, do the opposite and print all of the lines
that don't match the expression, in this case, the # commented lines.
3. Find all .mp3 Files Only
The grep can be very useful for filtering from stdout. For example,
let's say that you have an entire folder full of music files in a
bunch of different formats. You want to find all of the *.mp3 files
from the artist JayZ, but you don't want any of the remixed tracks.
Using a find command with a couple of grep pipes will do the trick:
# find . -name "*.mp3" | grep -i JayZ | grep -vi "remix"
