Re: major blunders
Date: Thu, 8 Oct 2009 09:31:40 -0700
Message-ID: <bf46380910080931n30421ecem3c0500d55b1e921c_at_mail.gmail.com>
Agreed.
For many years now I have used 'find' for recursive deletes, and verify the output of find before removing files.
Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist
Oracle Blog: http://jkstill.blogspot.com
Home Page: http://jaredstill.com
On Thu, Oct 8, 2009 at 4:51 AM, Mercadante, Thomas F (LABOR) < Thomas.Mercadante_at_labor.state.ny.us> wrote:
> How about:
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> **Never** use rm �rf ?
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> I learned that lesson.
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> I now go to the specific directory. Check twice to make sure I�m there.
> And simply rm *.log or *.lis or *.trc
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> Then back up a directory and use rmdir directory name.
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> Rinse and repeat. This takes an extra 10 seconds.
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> Rm �r is very powerful and way too dangerous for me!
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> Tom
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>
> *From:* oracle-l-bounce_at_freelists.org [mailto:
> oracle-l-bounce_at_freelists.org] *On Behalf Of *Jared Still
> *Sent:* Wednesday, October 07, 2009 3:04 PM
> *To:* sims_at_suu.edu
> *Cc:* oracle-l_at_freelists.org
> *Subject:* Re: major blunders
>
>
>
> On Wed, Oct 7, 2009 at 8:41 AM, April Sims <sims_at_suu.edu> wrote:
>
> Compiling a list of major blunders to avoid:
>
> Don't use the number 8 for scripting or ORACLE_SID due to the wild card
> character * above it.
> Don't use rm *.*
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> Here's a subtle variation on that.
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> Say you wish to delete all *.lis files in a directory.
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> The command would be "rm -f *.lis"
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> The problem with the *. combination is that the * requires using the Shift
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> key, and the . does not require the shift key.
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> So, if your finger drags a little too long on the shift key, you end up
> with this:
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> rm -f *>lis
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> Can you guess what happens?
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> Yes, you now have an directory with one empty file named "lis".
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> A lesson learned long ago, and you can probably guess how I learned it.
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> Fortunately, this lesson was learned well after the lesson on having
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> good backups available...
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> Another thing I make use of when running potentially dangerous commands
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> such as rm: use ls first.
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> Want to see what will be removed by rm -f *.txt?
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> First run ls *.txt
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> Then use command history and edit the command you just ran.
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> This way you know the file specification is correct.
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> Same for shell scripts written to do mass maintenance.
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> Run it in 'dry run' mode before doing it for real.
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> eg.
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> for f in $( find . -name "stuff_i_do_not_want")
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> do
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> ls -ld $f
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> # uncomment the rm when you are sure it is correct
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> # rm $f
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> done
>
>
> Jared Still
> Certifiable Oracle DBA and Part Time Perl Evangelist
> Oracle Blog: http://jkstill.blogspot.com
> Home Page: http://jaredstill.com
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-- http://www.freelists.org/webpage/oracle-lReceived on Thu Oct 08 2009 - 11:31:40 CDT