UNIX for Dummies Questions & Answers

Hello

I'm trying to replace a string in multiple text files using the tcsh shell. For example I've got some files called test1 test2 test3 etc. Each of them contains "Hello World". Now I want to replace each "Hello" with "Howdy" using sed and a foreach loop.

I tried the following but it doesn't seem to work:

foreach i()
cat test$i sed '/Hello/s//Howdy/g' > test$i.new
end

Any suggestions?
thanks a lot

Dan

Hi,

This will work...

foreach i( 1 2 3 ) # number of files
sed 's/Hello/Howdy/g' test$i > test$i.new
mv test$i.new test$i
end