Follow these steps below to enable port security on a cisco switch.  Simply replace the mac address AAAA.AAAA.AAAA with the desired secure mac address.  Remember that a port must be an access port in order to enable port security.
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface fastEthernet 0/4
Switch(config-if)#switchport mode access
Switch(config-if)#switchport port-security
Switch(config-if)#switchport port-security mac-address AAAA [...]

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Follow these steps to create a new vlan and add an existing port to this vlan.  Notice the use of the description command.  This is helpful for tracking down what server is plugged into what switch.
Switch>enable
Switch#conf t
Switch#conf terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface fastEthernet 0/2
Switch(config-if)#description server2
Switch(config-if)#switchport access vlan 25
% Access VLAN does [...]

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