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)