The general requirements are as follows:
PATH variable to include /usr/sbin, /usr/lib/lvm, and /etc/lvm.
If you do not set this path, you may get other versions of the software.
Modify your MANPATH to include /usr/share/man.
If you do not set this path, you could get man pages for the wrong release, or no man pages at all.
You can set these paths by using an editor to change your $HOME/.profile or ~/.cshrc file, as follows.
If you're using the Bourne shell, your $HOME/.profile file should have lines like this:
PATH=/usr/sbin:/etc/lvm:/usr/lib/lvm:$PATH MANPATH=/usr/share/man:$MANPATH export PATH MANPATH
set path = (/usr/sbin,/usr/lib/lvm,/etc/lvm:$path) setenv MANPATH /usr/share/man:$MANPATH