运行Hadoop start-all.sh遇到的错误ssh: connect to host localhost port 22: Connection refused

ssh: connect to host localhost port 22: Connection refused
我的情况是ssh server没装，查看方法：

ps -e |grep ssh

如果没有sshd，说明还没有安装ssh server

解决方案：

sudo apt-get install openssh-server

之后运行start-all.sh就成功了
执行jps结果：

yufeng@yufeng-pc:~/hadoop/hadoop-1.2.1/bin$ jpsPicked up _JAVA_OPTIONS:   -Dawt.useSystemAAFontSettings=gasp5328 NameNode5491 JobTracker9636 Jps9244 DataNode9549 TaskTracker9391 SecondaryNameNode