How to make duplicate lines

Shell Programming and Scripting
1

input

tophr5:178975153-178982740:+
tophrX:14502176-14502376:+

output

>tophr5:178975153-178982740:+
tophr5:178975153-178982740:+
>tophrX:14502176-14502376:+
tophrX:14502176-14502376:+
2

Try:

awk '{print ">"$0}1' file
3

A sed one:

sed "h;s/^/>/;p;x" file