---
name: "nauty-catg"
section: "1"
platform: "linux"
package: "nauty"
version: "2.8.9+ds-1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/nauty-catg"
---

# nauty-catg(1)

concatenate files of graphs

## 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.