So you want to replace a regular expression in multiple files under Linux?
Well, there are two convenient ways this can be done with a single line from a shell.
First, you can use SED
sed -i -e 's/source/destination/g' *.txt
"source" is of course the part to search for, and "destination" is what you want it replaced to. Also replace *.txt with whatever.
The second solution is to use perl
perl -pi -e 's/source/destination/g' *.txt
If you want something really nasty, you can use perl mixed with the 'find' command
perl -pi -e 's/source/destination/g' `find . -name '*.txt'`
Note the different quotes here... Might be a bit tricky to find, depending on your keyboard layout. This lets you replace in the files found by the find command, and is a quite powerful form of search and replace.
