Provided by: nauty_2.8.8+ds-5_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 2.8.8 April 2024 NAUTY-CATG(1)