原因：端口被占用
关闭占用端口程序即可
oatrc:~/Desktop$ sudo apt-get update
Ign file: InRelease
Ign file: InRelease
Err http://ppa.launchpad.net trusty InRelease
Err http://ppa.launchpad.net trusty InRelease
Err http://ppa.launchpad.net trusty InRelease
Err http://dl.google.com stable InRelease
Err http://ppa.launchpad.net trusty Release.gpg
Unable to connect to 127.0.0.1:33694:
Err http://ppa.launchpad.net trusty Release.gpg
Unable to connect to 127.0.0.1:33694:
Err http://ppa.launchpad.net trusty Release.gpg
Unable to connect to 127.0.0.1:33694:
Ign https://mirrors.ustc.edu.cn trusty InRelease
Err http://dl.google.com stable Release.gpg
Unable to connect to 127.0.0.1:33694:
Ign https://mirrors.ustc.edu.cn trusty-security InRelease
Ign https://mirrors.ustc.edu.cn trusty-updates InRelease
Ign https://mirrors.ustc.edu.cn trusty-backports InRelease
Err http://packages.ros.org trusty InRelease
Get:1 file: Release.gpg [819 B]
Err http://packages.ros.org trusty Release.gpg
Unable to connect to 127.0.0.1:33694:
Ign https://mirrors.ustc.edu.cn trusty Release.gpg
Get:2 file: Release.gpg [819 B]
Ign https://mirrors.ustc.edu.cn trusty-security Release.gpg
Get:3 file: Release [574 B]
Ign https://mirrors.ustc.edu.cn trusty-updates Release.gpg
Ign https://mirrors.ustc.edu.cn trusty-backports Release.gpg
Ign https://mirrors.ustc.edu.cn trusty Release
Ign https://mirrors.ustc.edu.cn trusty-security Release
Get:4 file: Release [574 B]
Ign https://mirrors.ustc.edu.cn trusty-updates Release
Ign https://mirrors.ustc.edu.cn trusty-backports Release
Ign https://mirrors.ustc.edu.cn trusty/main Sources/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty/restricted Sources/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty/universe Sources/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty/multiverse Sources/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty/main amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty/restricted amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty/universe amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty/multiverse amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty/main i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty/restricted i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty/universe i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty/multiverse i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-security/main Sources/DiffIndex
Ign file: Translation-en_US
Ign file: Translation-en
Ign https://mirrors.ustc.edu.cn trusty-security/restricted Sources/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-security/universe Sources/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-security/multiverse Sources/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-security/main amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-security/restricted amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-security/universe amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-security/multiverse amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-security/main i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-security/restricted i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-security/universe i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-security/multiverse i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-updates/main Sources/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-updates/restricted Sources/DiffIndex
Ign file: Translation-en_US
Ign file: Translation-en
Ign https://mirrors.ustc.edu.cn trusty-updates/universe Sources/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-updates/multiverse Sources/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-updates/main amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-updates/restricted amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-updates/universe amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-updates/multiverse amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-updates/main i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-updates/restricted i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-updates/universe i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-updates/multiverse i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-backports/main Sources/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-backports/restricted Sources/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-backports/universe Sources/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-backports/multiverse Sources/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-backports/main amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-backports/restricted amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-backports/universe amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-backports/multiverse amd64 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-backports/main i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-backports/restricted i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-backports/universe i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty-backports/multiverse i386 Packages/DiffIndex
Ign https://mirrors.ustc.edu.cn trusty/main Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty/main Translation-en
Ign https://mirrors.ustc.edu.cn trusty/multiverse Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty/multiverse Translation-en
Ign https://mirrors.ustc.edu.cn trusty/restricted Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty/restricted Translation-en
Ign https://mirrors.ustc.edu.cn trusty/universe Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty/universe Translation-en
Ign https://mirrors.ustc.edu.cn trusty-security/main Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty-security/main Translation-en
Ign https://mirrors.ustc.edu.cn trusty-security/multiverse Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty-security/multiverse Translation-en
Ign https://mirrors.ustc.edu.cn trusty-security/restricted Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty-security/restricted Translation-en
Ign https://mirrors.ustc.edu.cn trusty-security/universe Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty-security/universe Translation-en
Ign https://mirrors.ustc.edu.cn trusty-updates/main Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty-updates/main Translation-en
Ign https://mirrors.ustc.edu.cn trusty-updates/multiverse Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty-updates/multiverse Translation-en
Ign https://mirrors.ustc.edu.cn trusty-updates/restricted Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty-updates/restricted Translation-en
Ign https://mirrors.ustc.edu.cn trusty-updates/universe Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty-updates/universe Translation-en
Ign https://mirrors.ustc.edu.cn trusty-backports/main Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty-backports/main Translation-en
Ign https://mirrors.ustc.edu.cn trusty-backports/multiverse Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty-backports/multiverse Translation-en
Ign https://mirrors.ustc.edu.cn trusty-backports/restricted Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty-backports/restricted Translation-en
Ign https://mirrors.ustc.edu.cn trusty-backports/universe Translation-en_US
Ign https://mirrors.ustc.edu.cn trusty-backports/universe Translation-en
Err https://mirrors.ustc.edu.cn trusty/main Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty/restricted Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty/universe Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty/multiverse Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty/main amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty/restricted amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty/universe amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty/multiverse amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty/main i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty/restricted i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty/universe i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty/multiverse i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-security/main Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-security/restricted Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-security/universe Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-security/multiverse Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-security/main amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-security/restricted amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-security/universe amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-security/multiverse amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-security/main i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-security/restricted i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-security/universe i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-security/multiverse i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-updates/main Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-updates/restricted Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-updates/universe Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-updates/multiverse Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-updates/main amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-updates/restricted amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-updates/universe amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-updates/multiverse amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-updates/main i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-updates/restricted i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-updates/universe i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-updates/multiverse i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-backports/main Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-backports/restricted Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-backports/universe Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-backports/multiverse Sources
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-backports/main amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-backports/restricted amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-backports/universe amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-backports/multiverse amd64 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-backports/main i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-backports/restricted i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-backports/universe i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Err https://mirrors.ustc.edu.cn trusty-backports/multiverse i386 Packages
Failed to connect to 127.0.0.1 port 33694: Connection refused
Reading package lists... Done
W: Failed to fetch http://ppa.launchpad.net/fkrull/deadsnakes/ubuntu/dists/trusty/InRelease
W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/InRelease
W: Failed to fetch http://ppa.launchpad.net/hanipouspilot/rtlwifi/ubuntu/dists/trusty/InRelease
W: Failed to fetch http://packages.ros.org/ros/ubuntu/dists/trusty/InRelease
W: Failed to fetch http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu/dists/trusty/InRelease
W: Failed to fetch http://ppa.launchpad.net/fkrull/deadsnakes/ubuntu/dists/trusty/Release.gpg Unable to connect to 127.0.0.1:33694:
W: Failed to fetch http://ppa.launchpad.net/hanipouspilot/rtlwifi/ubuntu/dists/trusty/Release.gpg Unable to connect to 127.0.0.1:33694:
W: Failed to fetch http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu/dists/trusty/Release.gpg Unable to connect to 127.0.0.1:33694:
W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/Release.gpg Unable to connect to 127.0.0.1:33694:
W: Failed to fetch http://packages.ros.org/ros/ubuntu/dists/trusty/Release.gpg Unable to connect to 127.0.0.1:33694:
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty/main/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty/restricted/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty/universe/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty/multiverse/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty/main/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty/restricted/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty/universe/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty/multiverse/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty/main/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty/restricted/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty/universe/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty/multiverse/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-security/main/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-security/restricted/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-security/universe/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-security/multiverse/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-security/main/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-security/restricted/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-security/universe/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-security/multiverse/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-security/main/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-security/restricted/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-security/universe/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-security/multiverse/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-updates/main/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-updates/restricted/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-updates/universe/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-updates/multiverse/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-updates/main/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-updates/restricted/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-updates/universe/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-updates/multiverse/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-updates/main/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-updates/restricted/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-updates/universe/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-updates/multiverse/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-backports/main/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-backports/restricted/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-backports/universe/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-backports/multiverse/source/Sources Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-backports/main/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-backports/restricted/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-backports/universe/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-backports/multiverse/binary-amd64/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-backports/main/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-backports/restricted/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-backports/universe/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Failed to fetch https://mirrors.ustc.edu.cn/ubuntu/dists/trusty-backports/multiverse/binary-i386/Packages Failed to connect to 127.0.0.1 port 33694: Connection refused
W: Some index files failed to download. They have been ignored, or old ones used instead.