How to fix this problem with geth console?

~$ geth console
I0113 15:30:54.143093 6099 database.go:71] Alloted 16MB cache to /home/ubuntu/.ethereum/chaindata
I0113 15:30:54.145489 6099 database.go:71] Alloted 16MB cache to /home/ubuntu/.ethereum/dapp
I0113 15:30:54.146708 6099 backend.go:291] Protocol Versions: [62 61], Network Id: 1
I0113 15:30:54.146861 6099 backend.go:333] Blockchain DB Version: 3
I0113 15:30:54.147173 6099 chain_manager.go:248] Last block (#0) d4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3 TD=17179869184
I0113 15:30:54.151645 6099 cmd.go:125] Starting Geth/v1.2.2/linux/go1.5
I0113 15:30:54.151795 6099 server.go:311] Starting Server
I0113 15:30:56.251406 6099 udp.go:204] Listening, enode://465f54e7b0e91e85d6f96be3408b2ac79c9b8a2dafd9f6d84a25d380e862fab7d[email protected][::]:30303
Fatal: Error starting Ethereum: listen tcp :30303: bind: address already in use
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