This is the command nauty-catg 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
PROGRAM:
NAME
nauty-catg - concatenate files of graphs
SYNOPSIS
catg [-xv] [infile]...
DESCRIPTION
Copy files to stdout with all but the first header removed.
-x Don't write a header. In the absence of -x, a header is written if there is one in
the first input file.
-v Summarize to stderr.
Use nauty-catg online using onworks.net services