Cisco switch port in err disabled , how to recover

go to the specific port configuration mode.

disable port security , disable and enable

show port 0/19                          will show state

Port  Name               Status     Vlan       Level  Duplex Speed Type
----- ------------------ ---------- ---------- ------ ------ ----- ------------
0/19              errdisable   1 normal   auto  auto 10/100BaseTX
 

acc-sw-2960-48p-svr-(config-if)#no switchport port-security

acc-sw-2960-48p-svr-(config-if)#shutdown

acc-sw-2960-48p-svr-(config-if)#no shutdown