To claim land on the server, stand in the middle of where you wish to claim your land and use the command /plot. All claimed plots can be seen in purple on the server map. Use this to see if your plot covers everything you wish to protect.
View all commands: /plot
Display plot boundary: /plot scan
Claim a plot: /plot claim
List your plots /plot list
List your friends' plots /plot flist
Teleport to plot /toplot [plotname]
Rename a plot: /plot rename [plotname]
Delete a plot: /plot free
Get plot details: /plot info
Add a player to plot: /plot trust [player]
Remove a player from plot: /plot untrust [player]
Increase plot size: /plot upgrade
Decrease plot size: /plot downgrade
Set plot center: /plot setcenter
Set plot spawn point: /plot setspawn