This is the command fitshdr that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
fitshdr - List headers from a FITS file
fitshdr [-q N] [<infile>]
List headers from a FITS file specified on the command line, or else on stdin, printing
them as 80-character keyrecords without trailing blanks.
-q N Quit after reading the Nth header, where N is an integer (optional space between -q
Use fitshdr online using onworks.net services