how to append a string to multiple files in linux

Question

I have a folder containing multiple files such as

• file1
• myfile
• thisbogusfile
• anotherfile

I would like to append the string .txt at the end of every file. How can I do that with the command line?

Thanks!

Answer 1

You mean you want to rename the files

foreach i (*)
   mv "$i" "$i.txt"
end