Find command

Posted on 2011-09-22
Last Modified: 2012-05-12
find /tmp/mydirectory -type f –iname -mtime +30 -exec rm -f {} \;

I want to find  and remove specific files with extensions .dat,.txt,.TXT,.csv,.XLS from /tmp/mydirectory which are 30days old.
Can some body tell me how to pass the combination of file extensions so that only files with these extensions are picked and deleted?(Any files other than these set of extensions should not be removed.I'm using redhat Red Hat Enterprise Linux).Thanks in advance
Question by:prashubk
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
  • 2
LVL 84

Expert Comment

ID: 36584809
-iname '*.dat' -o -iname '*.txt' -o -iname '*.csv' -o -iname '*.xls'
LVL 21

Expert Comment

ID: 36584841
find /tmp/mydirectory -type f –iname '*.dat' -o -iname '*.txt' -o -iname '*.csv' -o -iname '*.xls' -mtime +30 | xargs rm -f

Open in new window

If you have -o's and an exec, then you will need an exec for each -o.  xargs is more efficient as well, in some cases at least.
LVL 84

Accepted Solution

ozo earned 250 total points
ID: 36584852
you can use
\( -iname '*.dat' -o -iname '*.txt' -o -iname '*.csv' -o -iname '*.xls' \) -mtime +30 -exec
but xargs is generally more efficient
Tutorials alone can't teach real engineering

So we built better training tools.

-Hands-on Labs
-Instructor Mentoring
-Scenario-Based Tests
-Dedicated Cloud Servers

All at your fingertips. What are you waiting for?


Author Comment

ID: 36584870
thanks for the answers.  Why do we say xargs is more efficient over exec?. What is the advantages of using xargs over exec in this context?
LVL 21

Assisted Solution

Papertrip earned 250 total points
ID: 36584884
exec will spawn a new process (rm -f) for each match.  xargs contructs a list and will spawn the process once it hits the limit defined by the system.

[root@broken etc]# xargs --show-limits
Your environment variables take up 1699 bytes
POSIX upper limit on argument length (this system): 2617693
POSIX smallest allowable upper limit on argument length (all systems): 4096
Maximum length of command we could actually use: 2615994
Size of command buffer we are actually using: 131072

Open in new window

LVL 21

Expert Comment

ID: 36584913
Thanks for the assist, and no offense to ozo of course, but why was http:#36584852 chosen as Accepted Solution?

Are you not going to use xargs like we both suggest?  If you are then technically http:#36584841 is exactly what you want and should have been the Accepted Solution.

Author Comment

ID: 36584925
sorry ,oh yes i should have accepted 36584841 as this is what i'm intended to use.Well Ozo contributed with the idea  to pick files with desired extension
LVL 21

Expert Comment

ID: 36584948
All good, just wondering, thanks for replying.

Good luck!

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Have you ever been frustrated by having to click seven times in order to retrieve a small bit of information from the web, always the same seven clicks, scrolling down and down until you reach your target? When you know the benefits of the command l…
The purpose of this article is to fix the unknown display problem in Linux Mint operating system. After installing the OS if you see Display monitor is not recognized then we can install "MESA" utilities to fix this problem or we can install additio…
There's a multitude of different network monitoring solutions out there, and you're probably wondering what makes NetCrunch so special. It's completely agentless, but does let you create an agent, if you desire. It offers powerful scalability …
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor ( Top Charts is a view in which you can set seve…

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question