How to edit multiple files in several sub directories?

[laxman]

I want to add particular text to multiple files in each directories

Directories such as d1,d2,d3 so on. Each directory contains a unique file name named print.txt but contains different content. I want to add a particular text to each of the text file. How to add the text?

[Luuk]

for f in `ls d?/print.txt`; do echo "some text" >>$f; done

[vakula]

find . -name "print.txt"|xargs perl -i.bak  -lne 'print;print "some text" if eof'

taken from <link removed>

[Luuk]

@vakula: This thread is 6, no 8!!, months old...... ? !!!