Making good use of the available Lyx templates for Thesis writeup (in Ubuntu)

/usr/share/texmf/tex/latex/lyx
--> cmuthesis.cls
--> sigplanconf.cls
--> xxxxx

/home/user/.lyx/layouts
--> cmuthesis.layout
--> sigplanconf.layout
--> unswthesis.layout

sudo texhash
(now on, the changes in cmuthesis.cls will immediately reflect on the pdf)

run lyx Tools->reconfigure

restart lyx

Open with lyx and start using the templates
--> cmuthesis_template.lyx
--> sigplanconf_template.lyx