Update Error?

Aku tak pasti apakah puncanya. Tapi ubuntu aku mengalami masalah kemaskini. Masalah ini baru pertama kali berlaku.

root2@ubuntu:~$ sudo apt-get update
Err http://archive.canonical.com hardy Release.gpg
Could not connect to localhost:4001 (127.0.0.1). - connect (111 Connection refused)
Err http://archive.canonical.com hardy/partner Translation-en_US
Could not connect to localhost:4001 (127.0.0.1). - connect (111 Connection refused)
Err http://ftp.science.nus.edu.sg hardy Release.gpg
Could not connect to localhost:4001 (127.0.0.1). - connect (111 Connection refused)
Err http://ftp.science.nus.edu.sg hardy/main Translation-en_US
Could not connect to localhost:4001 (127.0.0.1). - connect (111 Connection refused)

W: Failed to fetch http://archive.canonical.com/ubuntu/dists/hardy/Release.gpg Could not connect to localhost:4001 (127.0.0.1). - connect (111 Connection refused)

W: Failed to fetch http://archive.canonical.com/ubuntu/dists/hardy/partner/i18n/Translation-en_US.bz2 Could not connect to localhost:4001 (127.0.0.1). - connect (111 Connection refused)

W: Failed to fetch http://ftp.science.nus.edu.sg/ubuntu/dists/hardy/Release.gpg Could not connect to localhost:4001 (127.0.0.1). - connect (111 Connection refused)

W: Failed to fetch http://ftp.science.nus.edu.sg/ubuntu/dists/hardy/main/i18n/Translation-en_US.bz2 Could not connect to localhost:4001 (127.0.0.1). - connect (111 Connection refused)

W: Failed to fetch http://ftp.science.nus.edu.sg/ubuntu/dists/hardy/universe/i18n/Translation-en_US.bz2 Could not connect to localhost:4001 (127.0.0.1). - connect (111 Connection refused)

W: Failed to fetch http://ftp.science.nus.edu.sg/ubuntu/dists/hardy/restricted/i18n/Translation-en_US.bz2 Could not connect to localhost:4001 (127.0.0.1). - connect (111 Connection refused)

W: Failed to fetch http://ftp.science.nus.edu.sg/ubuntu/dists/hardy/multiverse/i18n/Translation-en_US.bz2 Could not connect to localhost:4001 (127.0.0.1). - connect (111 Connection refused)

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/hardy-security/Release.gpg Could not connect to localhost:4001 (127.0.0.1). - connect (111 Connection refused)
W: Failed to fetch http://ftp.science.nus.edu.sg/ubuntu/dists/hardy-backports/multiverse/i18n/Translation-en_US.bz2 Could not connect to localhost:4001 (127.0.0.1). - connect (111 Connection refused)

W: Failed to fetch http://ftp.science.nus.edu.sg/ubuntu/dists/hardy-backports/restricted/i18n/Translation-en_US.bz2 Could not connect to localhost:4001 (127.0.0.1). - connect (111 Connection refused)

W: Some index files failed to download, they have been ignored, or old ones used instead.
W: You may want to run apt-get update to correct these problems

Apakah masalah ini? Mari cari jalan penyelesaiannya