当我使用此命令启动Hadoop时
localhost: ssh: connect to host localhost port 22: Connection refused
所以我尝试通过签名到localhost来解决问题，但连接被拒绝了，问题是：
localhost: ssh: connect to host localhost port 22: Connection refused
同样的消息 所以我搜索了许多网站并使用了这些命令
$ sudo apt-get install openssh-server
我收到了这个错误
阅读包列表...完成构建依赖关系树读取 状态信息...完成包openssh-server不可用，但是 由另一个包引用。这可能意味着包裹 缺失，已被淘汰，或仅可从其他来源获得 E：包openssh-server没有安装候选者 试图做更新：
sudo apt-get update
得到了这个错误：
Ign http://security.ubuntu.com lucid-security Release.gpg
Ign http://security.ubuntu.com/ubuntu/ lucid-security/main Translation-en_US
Ign http://security.ubuntu.com/ubuntu/ lucid-security/restricted Translation-en_US
Ign http://us.archive.ubuntu.com lucid Release.gpg
Ign http://us.archive.ubuntu.com/ubuntu/ lucid/main Translation-en_US
Ign http://us.archive.ubuntu.com/ubuntu/ lucid/restricted Translation-en_US
Ign http://security.ubuntu.com/ubuntu/ lucid-security/universe Translation-en_US
Ign http://security.ubuntu.com/ubuntu/ lucid-security/multiverse Translation-en_US
Ign http://us.archive.ubuntu.com/ubuntu/ lucid/universe Translation-en_US
Ign http://us.archive.ubuntu.com/ubuntu/ lucid/multiverse Translation-en_US
Ign http://us.archive.ubuntu.com lucid-updates Release.gpg
Ign http://security.ubuntu.com lucid-security Release
Ign http://us.archive.ubuntu.com/ubuntu/ lucid-updates/main Translation-en_US
Ign http://us.archive.ubuntu.com/ubuntu/ lucid-updates/restricted Translation-en_US
Ign http://us.archive.ubuntu.com/ubuntu/ lucid-updates/universe Translation-en_US
Ign http://us.archive.ubuntu.com/ubuntu/ lucid-updates/multiverse Translation-en_US
Ign http://us.archive.ubuntu.com lucid Release
Ign http://security.ubuntu.com lucid-security/main Packages
Ign http://security.ubuntu.com lucid-security/restricted Packages
Ign http://security.ubuntu.com lucid-security/main Sources
Ign http://security.ubuntu.com lucid-security/restricted Sources
Ign http://security.ubuntu.com lucid-security/universe Packages
Ign http://security.ubuntu.com lucid-security/universe Sources
Ign http://security.ubuntu.com lucid-security/multiverse Packages
Ign http://security.ubuntu.com lucid-security/multiverse Sources
Ign http://security.ubuntu.com lucid-security/main Packages
Ign http://security.ubuntu.com lucid-security/restricted Packages
Ign http://security.ubuntu.com lucid-security/main Sources
Ign http://security.ubuntu.com lucid-security/restricted Sources
Ign http://security.ubuntu.com lucid-security/universe Packages
Ign http://us.archive.ubuntu.com lucid-updates Release
Ign http://security.ubuntu.com lucid-security/universe Sources
Ign http://security.ubuntu.com lucid-security/multiverse Packages
Ign http://security.ubuntu.com lucid-security/multiverse Sources
Err http://security.ubuntu.com lucid-security/main Packages
404 Not Found [IP: 91.189.91.26 80]
Err http://security.ubuntu.com lucid-security/restricted Packages
404 Not Found [IP: 91.189.91.26 80]
Err http://security.ubuntu.com lucid-security/main Sources
404 Not Found [IP: 91.189.91.26 80]
Err http://security.ubuntu.com lucid-security/restricted Sources
404 Not Found [IP: 91.189.91.26 80]
Err http://security.ubuntu.com lucid-security/universe Packages
404 Not Found [IP: 91.189.91.26 80]
Err http://security.ubuntu.com lucid-security/universe Sources
404 Not Found [IP: 91.189.91.26 80]
Err http://security.ubuntu.com lucid-security/multiverse Packages
404 Not Found [IP: 91.189.91.26 80]
Err http://security.ubuntu.com lucid-security/multiverse Sources
404 Not Found [IP: 91.189.91.26 80]
Ign http://us.archive.ubuntu.com lucid/main Packages
Ign http://us.archive.ubuntu.com lucid/restricted Packages
Ign http://us.archive.ubuntu.com lucid/main Sources
Ign http://us.archive.ubuntu.com lucid/restricted Sources
Ign http://us.archive.ubuntu.com lucid/universe Packages
Ign http://us.archive.ubuntu.com lucid/universe Sources
Ign http://us.archive.ubuntu.com lucid/multiverse Packages
Ign http://us.archive.ubuntu.com lucid/multiverse Sources
Ign http://us.archive.ubuntu.com lucid-updates/main Packages
Ign http://us.archive.ubuntu.com lucid-updates/restricted Packages
Ign http://us.archive.ubuntu.com lucid-updates/main Sources
Ign http://us.archive.ubuntu.com lucid-updates/restricted Sources
Ign http://us.archive.ubuntu.com lucid-updates/universe Packages
Ign http://us.archive.ubuntu.com lucid-updates/universe Sources
Ign http://us.archive.ubuntu.com lucid-updates/multiverse Packages
Ign http://us.archive.ubuntu.com lucid-updates/multiverse Sources
Ign http://us.archive.ubuntu.com lucid/main Packages
Ign http://us.archive.ubuntu.com lucid/restricted Packages
Ign http://us.archive.ubuntu.com lucid/main Sources
Ign http://us.archive.ubuntu.com lucid/restricted Sources
Ign http://us.archive.ubuntu.com lucid/universe Packages
Ign http://us.archive.ubuntu.com lucid/universe Sources
Ign http://us.archive.ubuntu.com lucid/multiverse Packages
Ign http://us.archive.ubuntu.com lucid/multiverse Sources
Ign http://us.archive.ubuntu.com lucid-updates/main Packages
Ign http://us.archive.ubuntu.com lucid-updates/restricted Packages
Ign http://us.archive.ubuntu.com lucid-updates/main Sources
Ign http://us.archive.ubuntu.com lucid-updates/restricted Sources
Ign http://us.archive.ubuntu.com lucid-updates/universe Packages
Ign http://us.archive.ubuntu.com lucid-updates/universe Sources
Ign http://us.archive.ubuntu.com lucid-updates/multiverse Packages
Ign http://us.archive.ubuntu.com lucid-updates/multiverse Sources
Err http://us.archive.ubuntu.com lucid/main Packages
404 Not Found [IP: 91.189.91.23 80]
Err http://us.archive.ubuntu.com lucid/restricted Packages
404 Not Found [IP: 91.189.91.23 80]
Err http://us.archive.ubuntu.com lucid/main Sources
404 Not Found [IP: 91.189.91.23 80]
Err http://us.archive.ubuntu.com lucid/restricted Sources
404 Not Found [IP: 91.189.91.23 80]
Err http://us.archive.ubuntu.com lucid/universe Packages
404 Not Found [IP: 91.189.91.23 80]
Err http://us.archive.ubuntu.com lucid/universe Sources
404 Not Found [IP: 91.189.91.23 80]
Err http://us.archive.ubuntu.com lucid/multiverse Packages
404 Not Found [IP: 91.189.91.23 80]
Err http://us.archive.ubuntu.com lucid/multiverse Sources
404 Not Found [IP: 91.189.91.23 80]
Err http://us.archive.ubuntu.com lucid-updates/main Packages
404 Not Found [IP: 91.189.91.23 80]
Err http://us.archive.ubuntu.com lucid-updates/restricted Packages
404 Not Found [IP: 91.189.91.23 80]
Err http://us.archive.ubuntu.com lucid-updates/main Sources
404 Not Found [IP: 91.189.91.23 80]
Err http://us.archive.ubuntu.com lucid-updates/restricted Sources
404 Not Found [IP: 91.189.91.23 80]
Err http://us.archive.ubuntu.com lucid-updates/universe Packages
404 Not Found [IP: 91.189.91.23 80]
Err http://us.archive.ubuntu.com lucid-updates/universe Sources
404 Not Found [IP: 91.189.91.23 80]
Err http://us.archive.ubuntu.com lucid-updates/multiverse Packages
404 Not Found [IP: 91.189.91.23 80]
Err http://us.archive.ubuntu.com lucid-updates/multiverse Sources
404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/lucid-security/main/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.26 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/lucid-security/restricted/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.26 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/lucid-security/main/source/Sources.gz 404 Not Found [IP: 91.189.91.26 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/lucid-security/restricted/source/Sources.gz 404 Not Found [IP: 91.189.91.26 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/lucid-security/universe/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.26 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/lucid-security/universe/source/Sources.gz 404 Not Found [IP: 91.189.91.26 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/lucid-security/multiverse/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.26 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/lucid-security/multiverse/source/Sources.gz 404 Not Found [IP: 91.189.91.26 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid/main/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid/restricted/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid/main/source/Sources.gz 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid/restricted/source/Sources.gz 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid/universe/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid/universe/source/Sources.gz 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid/multiverse/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid/multiverse/source/Sources.gz 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid-updates/main/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid-updates/restricted/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid-updates/main/source/Sources.gz 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid-updates/restricted/source/Sources.gz 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid-updates/universe/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid-updates/universe/source/Sources.gz 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid-updates/multiverse/binary-i386/Packages.gz 404 Not Found [IP: 91.189.91.23 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/lucid-updates/multiverse/source/Sources.gz 404 Not Found [IP: 91.189.91.23 80]
E: Some index files failed to download, they have been ignored, or old ones used instead.
请帮助