topic Re: Script writting in Operating System - Linux

Script writting

hangyu — Mon, 19 Mar 2007 04:50:54 GMT

There are some files under the path /tmp , if I want to remove all the files which contains the word "testing" , what can I do ? thx

Re: Script writting

Jarle Bjorgeengen — Mon, 19 Mar 2007 05:09:25 GMT

Try:

#find . -type f |xargs grep test|awk -F ":" '{print $1}' |uniq

to see if files are matched correctly , then

#find . -type f |xargs grep test|awk -F ":" '{print $1}' |uniq |xargs rm

Re: Script writting

Jarle Bjorgeengen — Mon, 19 Mar 2007 05:10:07 GMT

s/find ./find /tmp/g

Re: Script writting

hangyu — Mon, 19 Mar 2007 20:34:27 GMT

thx reply ,

it is strange that I try it in two machines , one is perfectly work , but another machine can only show the word "testing" in the result ( what I need is the file name not the word I search ) , can advise what is wrong in this machine ? thx

$find . -type f -maxdepth 1 |xargs grep testing|awk -F ":" '{print $1}' |uniq
testing

Re: Script writting

Hein van den Heuvel — Mon, 19 Mar 2007 21:11:06 GMT

Well, if that find on one machine, only finds 1 file, then grep will by default NOT output the filename ebfore each match, just show the match.
On the other machine there must have been more than one matches for the find, and xargs gives more than 1 input file to grep, and grep then knows it needs to tell you which file gave the match.

You can force this using: grep -H for --with-filename

(on my version of grep. Check with grep --help)

hth,
Hein van den Heuvel

Re: Script writting

hangyu — Mon, 19 Mar 2007 21:59:43 GMT

thx Hein van den ,

It works fine now after add -H , I still have a question , if I want to move it to another directory , I try

find . -type f -maxdepth 1 |xargs grep testing|awk -F ":" '{print $1}' |uniq |xargs mv /tmp/ora , it is not work , can advise what is wrong ? thx

mv: cannot overwrite non-directory `./abc' with directory `/tmp/ora/'

Re: Script writting

Hein van den Heuvel — Mon, 19 Mar 2007 22:49:43 GMT

You may have to drop the final xargs.
It combines multiple arguments for one operation. That's fine for 'rm' but tricky for 'mv'.

Just replace the 'mv' with 'echo' and see in clear print what you were about to ask the system to do!

Hein.

Re: Script writting

hangyu — Mon, 19 Mar 2007 23:06:23 GMT

thx Hein van den ,

I am not too understand , can advise what I need to do ? thx

Re: Script writting

hangyu — Tue, 20 Mar 2007 04:16:49 GMT

Thx reply ,

I have solved it , thx much for help.

Re: Script writting

Stuart Browne — Tue, 20 Mar 2007 17:03:58 GMT

Why not use 'find' for almost-everything?

find /tmp -type f -exec grep "testing" {} \; -exec mv {} /other/path/ \;

Same format can be used for the 'rm'.

Re: Script writting

Stuart Browne — Tue, 20 Mar 2007 17:04:47 GMT

Oh, and if you don't want to see the grep 'testing' output for every match, use 'grep -q "testing" {}'..

(0pts pls)

Re: Script writting

hangyu — Wed, 21 Mar 2007 03:57:49 GMT

thx all.

Re: Script writting

Om prakash_1 — Wed, 21 Mar 2007 14:38:21 GMT

How can i use find with tar command. and in case i want to tar files for one particular date how can i do that.

Re: Script writting

Stuart Browne — Wed, 21 Mar 2007 17:58:32 GMT

Om, please start a new thread.

Short answer: Look at '-T -'.