Why the fuck wont this work? >ls file1 file2 file3 You need

so it needs to be name

File-1 File-2 File-3

 mv -T file{1..3} File-{1..3} 

This doesnt work either =(

> You need to rename
rename file File- ./file{1,2,3}
Is this what you're looking for?

>>57759233
rename is not an option. Must use mv

>>57759483

for i in {1,2,3}; do mv file$i File-$i; done

>>57759616
>semicolons

Those are newlines.

>>57759816
No, newlines are newlines.

>>57760329
The phrase "single line" has no meaning in a bash question because every bash script can be made in a single line with semicolons, thus when OP says "single line" he means no semicolons either.