Provided by: nauty_2.8.9+ds-1_amd64 

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.
nauty 2.8.9 September 2024 NAUTY-CATG(1)