to see all available graphviz packages.

$ apt-cache search graphviz |grep ^g
graphviz - rich set of graph drawing tools
graphviz-dev - transitional package for graphviz-dev rename
graphviz-doc - additional documentation for graphviz

$ apt-cache search graphviz |grep Graphviz
dot2tex - Graphviz to LaTeX converter
libgraph-easy-perl - Perl module to convert or render graphs (as ASCII, HTML, SVG or via Graphviz)
python-pydot - Python interface to Graphviz's dot
python-pygraphviz - Python interface to the Graphviz graph layout and visualization package
python-yapgvb - Python bindings for Graphviz, using Boost.Python
xdot - interactive viewer for Graphviz dot files
			

$ sudo apt install graphviz
			

Test, A "Hello World" example made by giving the command:

echo "digraph G {Hello->World}" | dot -Tpng >hello.png
			

# yum list 'graphviz*'
# yum install graphviz