topic Re: script - help in Operating System - Linux

script - help

Pat Peter — Thu, 09 Feb 2006 15:13:24 GMT

Hi,

I have a nearly 120 html files in one server. Now we have migrated the files to a new server.

So I have written a redirect script which would redirect to the new server.

Now I would need to remove the contents of each html file and put the content of my redirect script in each of the HTML file.

Can anyone please tell me if I can remove the entire content of each file and put the content of my redirect script in each file.

I am not good in PERL or SHELL scripting.

Please help.

Thanks,
Pat

Re: script - help

Geoff Wild — Thu, 09 Feb 2006 16:17:42 GMT

Use sed

sed 's/serverold/servernew/g' somefile.html > somenewfile.html

Rgds...Geoff

Re: script - help

Rodney Hills — Thu, 09 Feb 2006 16:18:04 GMT

If you're talking about doing a massive update to several html files where you need to change the paths to the new server, then perl could do it in one line-

perl -i -p -e 's{old/path}{new/path}g' *.html

HTH

-- Rod Hills

Re: script - help

Pat Peter — Thu, 09 Feb 2006 17:31:56 GMT

HI,

I think I was not very clear on my requirement in my thread.

What I want to do is

1. remove the entire contents of existing .html files in my directory.
2. Copy the content of one of the files in another directory to all the .html files in my directory.

Hope this one is littl emore clear.

Please help me.

Thanks,
Pat

Re: script - help

Rick Garland — Thu, 09 Feb 2006 17:36:55 GMT

To remove the contents of the existing html files in your directory

ls *.html | while read line
do
cat /dev/null > $line
done
This will keep the files in place but they will have 0 bytes in size.

To put something in a file
ls *.html | while read line
do
echo "This is the new stuff" > $line
done

Re: script - help

James R. Ferguson — Thu, 09 Feb 2006 17:46:20 GMT

Hi Pat:

Based upon your last specification you could do this to overlay all of your files with a copy of another:

# find -type f -name "*.html" | xargs -i cp /tmp/overlay {}

The /tmp/overlay file will replace every file in whose filename ends in ".html".

Regards!

...JRF...

Re: script - help

Geoff Wild — Thu, 09 Feb 2006 17:47:27 GMT

Clear as mud - sorry...

Are you saying, you want to keep all 120 html files, but make them empty? and then copy the contents of 1 file to all 120 html files?

cd /directoryof/existing/files

for i in `ls`
do
> $i
done

for i in `ls`
do
cat /directoryof/myredirectscript > $i
done

Rgds...Geoff

Re: script - help

Geoff Wild — Thu, 09 Feb 2006 17:51:38 GMT

Sorry - for html only, change my ls command to `ls *.html` or `ls *.htm` just incase there are other files you don't want clobbered...

While we are at it - make sure you have a good backup of those files...

Rgds...Geoff

Re: script - help

Pat Peter — Thu, 09 Feb 2006 17:52:06 GMT

Hi Rick,

The first part in your solution really helps. I am able to create the empty files by doing that.

But in the second step, I have a file called "redirect". I need to copy the content of this file to all the .html files.

Thanks,
Pat

Re: script - help

James R. Ferguson — Thu, 09 Feb 2006 18:46:06 GMT

Hi (again) Pat:

Unless I am misunderstanding you, you need to reexamine tha suggestion I offered using 'find' and 'xargs'. See the manpages for 'xargs' (particulary) to see how this technique works.

find -type f -name "*.html" | xargs -i cp redirect {}

Regards!

...JRF...

Re: script - help

Arturo Galbiati — Fri, 10 Feb 2006 05:53:18 GMT

Hi,
for FILE in $(ls -1 *.html)
do
> $FILE
cat redirect >$FILE
done

thsi will empty all the 8.html file in your directory and put the content of the file rediurect into the same files.

N.B. I don't understand why you want clean the files before? is not sufficient to replce teh contents (if yes remove > $FILE)

HTH,
Art

Re: script - help

Muthukumar_5 — Fri, 10 Feb 2006 06:00:06 GMT

You can use perl to update the change in the same file easily as,

# cat 1.html

test

# perl -pi -e 's/test/Pat/g' *.html
# cat 1.html

Pat

It is best method for not using any temporary files.

--
Muthu

Re: script - help

Muthukumar_5 — Fri, 10 Feb 2006 06:05:35 GMT

The first part in your solution really helps. I am able to create the empty files by doing that.

But in the second step, I have a file called "redirect". I need to copy the content of this file to all the .html files.

==>

It is confusing. Do you want to create files then simply as,

# > filename

If you want to copy the contents of redirect to new files then,

# cp redirect

In loop,

i=1
while [[ ${i} -lt 101 ]]
do
cp redirect ${i}.html
done

--
Muthu