Is there a one-line command/script to copy one file to many files on Linux?
cp file1 file2 file3
copies the first two files into the third.
The simplest/quickest solution I can think of is a for loop:
for target in file2 file3 do; cp file1 "$target"; done
A dirty hack would be the following (I strongly advise against it, and only works in bash anyway):
eval 'cp file1 '{file2,file3}';'