HowTo: Find a Directory On Linux Based System

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?

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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