Here is another guide on ranks for PermissionsEX Ranks with PermissionsEX
Ensure that you have Vault and Essentials Chat as well as PermissionsEX installed first.
To create ranks you will need the permissions.* permission, to get this go to console and type /pex user (your name) add permissions.*
Once you have that permission you can begin to make ranks, start by executing the command /pex group (rank) create to create the rank.
Then to add a permission do /pex group (rank) add (permission node)
To remove the permission do /pex group (rank) remove (permission node)
To add a prefix/suffix to the rank do /pex group (rank) prefix/suffix set “(prefix or suffix)”
To add a player to the rank type /pex user (user) group set (rank) NOTE: For permission nodes you can often find them by typing in (plugin) permission nodes into google