HowTo: Find a Directory On Linux Based System

by on August 25, 2013 · 9 comments· LAST UPDATED August 25, 2013

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I just switched from MS-Windows server admin to Debian Linux server admin role. I need to find a directory called project.images. I was also told that the locate command is the simplest and quickest way to find the locations of files and directories on Linux. But, the locate command is not working out for me. How do I find project.images directory using command line options only?

Tutorial details
DifficultyEasy (rss)
Root privilegesNo
Requirementsfind
Estimated completion time5m
You need to use the find command. It is used to locate files on a Linux or Unix like system. The locate command will searches through a prebuilt database of files generated by updatedb. The find command will search live file-system for files that match the search criteria.

Syntax

The find command syntax is:
find /where/to/look/up criteria action
OR
find /dir/path/look/up criteria action
OR
find /dir/path/look/up -name "dir-name-here"
OR
find /dir/path/look/up -name "pattern"
OR
find /dir/path/look/up -name "dir-name-here" -print
OR
find /dir/path/look/up -name "dir-name-here"
OR
find / -name "dir-name-here"

Examples

The following example will show all files in the current directory and all subdirectories:

find
find .
find . -print

Finding a directory

To find a directory called apt in / (root) file system, enter:

Alert: When searching / (root) file system, you need to run the find command as root user.

find  / -name "apt"

Sample outputs:

/var/log/apt
/var/lib/apt
/var/cache/apt
/etc/apt
/etc/logrotate.d/apt
/etc/cron.daily/apt

Getting a detailed list of files/dirs

Pass the -ls to list current file in ls command output format:

find  / -name "apt" -ls

Sample outputs:

4719035    4 drwxr-xr-x   2 root     root         4096 Aug 22 06:25 /var/log/apt
4718597    4 drwxr-xr-x   5 root     root         4096 Aug  4 13:46 /var/lib/apt
4718601    4 drwxr-xr-x   3 root     root         4096 Aug  8 09:37 /var/cache/apt
917524    4 drwxr-xr-x   6 root     root         4096 Jun 18 02:28 /etc/apt
917721    4 -rw-r--r--   1 root     root          173 Apr 15  2011 /etc/logrotate.d/apt
918762   16 -rwxr-xr-x   1 root     root        14985 Mar 14 12:48 /etc/cron.daily/apt

How do I list only directories?

Just find directories and skip file names pass the -type d option as follows:

find  / -type d -name "apt" -ls

Sample outputs:

4719035    4 drwxr-xr-x   2 root     root         4096 Aug 22 06:25 /var/log/apt
4718597    4 drwxr-xr-x   5 root     root         4096 Aug  4 13:46 /var/lib/apt
4718601    4 drwxr-xr-x   3 root     root         4096 Aug  8 09:37 /var/cache/apt
917524    4 drwxr-xr-x   6 root     root         4096 Jun 18 02:28 /etc/apt

How do I perform a case insensitive search?

Replace -name option with -iname as follows:

find  / -type d -iname "apt" -ls

OR

find  / -type d -iname "apt"

The patterns 'apt' match the directory names 'apt', 'APT', 'Apt', 'apT', etc.

How do I find a directory called project.images?

Type any one of the following command:

find  / -type d -iname "project.images" -ls

OR

find  / -type d -name "project.images" -ls

OR

find  / -type d -name "project.images"

A note about locate command

To search for a file/dir named exactly project.images (not *project.images*), type:

 
locate -b '\project.images'
 
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{ 9 comments… read them below or add one }

1 Slaven Tomac August 26, 2013 at 7:25 am

Why don’t you run updatedb and then locate and again you’ll have “simplest and quickest way to find the locations of files and directories on Linux”.

updatedb will update your database.

Reply

2 Dan Lund August 27, 2013 at 3:05 pm

That only helps for semi-permanent files since it only checks periodically to update the updatedb database. For files that were created recently it will not be found.

Reply

3 omgwtfbbq September 2, 2013 at 9:57 am

Find is a great tool that i use a lot.
You could have talk about the -exec switch wich allows you to process the outpout. ie : find and delete all file in ./ that haven’t been modified since 90 day:

find ./ -mtime 90 -exec rm -Rf {} \; 

Anyway, great job on this website, keep it on!

Reply

4 Bob September 4, 2013 at 5:43 am

I have to second that updatedb is the way to go for a novice linux user. No worries about syntax and whatnot. Its also very useful for when you need to do multiple scans since you only traverse the filesystem once.

In regards to -exec, you should be using -execdir when available due to some security implications… and the above rm -rf is somewhat dangerous since find by default traverses from the top down. Delete would be a much safer (and faster!!) operation than-exec rm.

Reply

5 omgwtfbbq September 4, 2013 at 9:01 am

Hi Bob,

I have to agree with your update, rm -Rf is maybe too dangerons to use for novice users.

I did not know -execdir wich seems to be very usefull.

Thank you for that update =)

Reply

6 Tiff October 15, 2013 at 3:14 pm

Great article!!! so useful!!! since I don’t have root, I get very verbose “no permission” output that is useless and I have to find the actual location through all the muck. Is there a way to only print found paths? Thanks so much for this article!

Reply

7 dan October 27, 2013 at 12:33 pm

All those “no permission” messages should be on stderr while the information you want is on stdout. Both stderr and stdout default to printing on the controlling terminal. Tacking “> stdoutfile” on the end of the command would separate them, leaving all the unwanted noise on the terminal and putting the good stuff in stdoutfile. It would make more sense to redirect stderr to /dev/null (throwing it away) and leaving the useful output on the controlling terminal, but that would require finding the instructions for redirecting stderr in the shell docs (again).

Reply

8 Zeb November 12, 2013 at 4:46 pm

To avoid seeing stderr messages, just use something like this:

find / -iname “*filename*” 2> /dev/null

Reply

9 Craig R Morton February 3, 2014 at 4:26 pm

Awesome, thanks!

Reply

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