# count number of files in subdirectories
find . -type f | wc -l

#find with command''
find  . -name \*.log*  -exec "cmd" {} \;

#Find with xargs''
find . -name "*.c" -print | xargs "comd"

find . \( -name ".svn" -o -path "*target"  \) -prune -o \( ! -name "*.class" \) -mtime 0 -type f   -exec grep -l "og:image" {} \;

#find with grep
find  . -name \*.html*  -exec grep "Customer Details" '{}' \; -print

Find by date

http://www.cyberciti.biz/faq/howto-finding-files-by-date/

find . -mtime 0   # find files modified between now and 1 day ago
                  # (i.e., within the past 24 hours)
find . -mtime -1  # find files modified less than 1 day ago
                  # (i.e., within the past 24 hours, as before)
find . -mtime 1   # find files modified between 24 and 48 hours ago
find . -mtime +1  # find files modified more than 48 hours ago

find . -mmin +5 -mmin -10 # find files modified between
                          # 6 and 9 minutes ago

Find Files By Access, Modification Date / Time

http://content.hccfl.edu/pollock/unix/findcmd.htm

[a] access (read the file's contents) - atime
[b] change the status (modify the file or its attributes) - ctime
[c] modify (change the file's contents) - mtime

You can search for files whose time stamps are within a certain age range, or compare them to other time stamps.

You can use -mtime option. It returns list of file if the file was last accessed N*24 hours ago. For example to find file in last 
2 months (60 days) you need to use -mtime +60 option.

    -mtime +60 means you are looking for a file modified 60 days ago.
    -mtime -60 means less than 60 days.
    -mtime 60 If you skip + or - it means exactly 60 days.

So to find text files that were last modified 60 days ago, use
$ find /home/you -iname "*.txt" -mtime -60 -print

Display content of file on screen that were last modified 60 days ago, use
$ find /home/you -iname "*.txt" -mtime -60 -exec cat {} \;

Count total number of files using wc command
$ find /home/you -iname "*.txt" -mtime -60 | wc -l

You can also use access time to find out pdf files. Following command will print the list of all pdf file that were accessed in last 60 days:
$ find /home/you -iname "*.pdf" -atime -60 -type -f

List all mp3s that were accessed exactly 10 days ago:
$ find /home/you -iname "*.mp3" -atime 10 -type -f

There is also an option called -daystart. It measure times from the beginning of today rather than from 24 hours ago. So, to list the all mp3s 
in your home directory that were accessed yesterday, type the command
$ find /home/you -iname "*.mp3" -daystart -type f -mtime 1

Where,

    -type f - Only search for files and not directories

-daystart option

The -daystart option is used to measure time from the beginning of the current day instead of 24 hours ago. Find out all perl (*.pl)
 file modified
yesterday, enter:

$ find /nas/projects/mgmt/scripts/perl -mtime 1 -daystart -iname "*.pl"

You can also list perl files that were modified 8-10 days ago, enter:
To list all of the files in your home directory tree that were modified from two to four days ago, type:

$ find /nas/projects/mgmt/scripts/perl -mtime 8 -mtime -10 -daystart -iname "*.pl"

Unix Shell: find files by a date range

http://my.galagzee.com/2009/02/23/unix-shell-find-files-by-a-date-range/

I needed to restore some files from an archive on UNIX, but only the files of a particular date-range were needed.
It took a few moments to find and figure out how I could easily extract files older than a particular date, or files 
from a particular date-range. This is how:

    Create a perimeter file, like so:
    touch -t yyyymmddHHMM marker_date

    List files older than the marker_date:
    find . -type f ! -newer marker_date -ls
   Of course, instead of `-ls’ parameter (to list), you can use `-print’ and a pipe to xargs to, for example,
 delete the selected files, etc.

Likewise, for a range of dates:

    Create the perimeter files:
    touch -t yyyymmddHHMM range_start
    touch -t yyyymmddHHMM range_end

    List the files between the range dates:
    find . -type f -newer range_start ! -newer range_end -ls