Piotr Zaniewicz

Using sed to change strings in multiple files

September 15, 2007 – 21:56

Ok, one more tip for today, which makes it very simple to change text within multiple files.
Say for example that you want to change Bush to Kerry in 50+ files ending with “html”.
OK, now you could edit them, but it is too much of a hustle. Instead let’s use sed and some bash scripting:

for F in `find ./ -type f -name '*.html' -print`;
do mv $F $F.tmp;
sed 's/Bush/Kerry/g' $F.tmp > $F;
rm $F.tmp;
done;

Be careful however, when changing “<” or “>” or any other character that has to be escaped! You have to escape it using a backslash – “\”. So for example to escape a “<” you would write “\<”. SIMPLE, right?

Questions? Here is a sed string changing script that I used.

Posted in Linux by Piotr Zaniewicz | No Comments »

Unzip, untar, unpack all archives

September 15, 2007 – 21:13

Once I came to a point of having downloaded 20+ tar.gz files and facing a need of finding an efficient way to extract them. If you are having such a problem then this simple solution will help:

for F in `find ./ -type f -name '*tar.gz' -print`;
do tar xvzf $F;
done;

What it does is for every file ending with “tar.gz” found in current folder “./” it executes a command “tar xvzf“, which unpacks the archive. Very simple but also VERY useful. Try with unzip and other commands.
Yes, you may delete files after unpacking by adding “rm $F;” after the tar statement.
However, it is always good to keep the original source!

Posted in Linux by Piotr Zaniewicz | No Comments »

How to use the gallery

September 15, 2007 – 21:04

New gallery is very powerful and features some dynamic content. I am sure you will be able to use it in the most efficient way. Here are some tips:

Click on in order to show the sidebar. After the sidebar is shown you can click on “Show Item Links” in order to have access to direct slideshows. A new icon will be shown next to the photo . Click on it and choose option of your interest.