hadoop namenode -format初始化执行完后找不到开启的命令

[root@localhost hadoop]# start-all.sh
bash: start-all.sh: command not found

而且在bin里边也找不到start-all.sh

[root@localhost hadoop-2.7.1]# cd bin
[root@localhost bin]# ls
container-executor  hdfs      mapred.cmd               yarn
hadoop              hdfs.cmd  rcc                      yarn.cmd
hadoop.cmd          mapred    test-container-executor
[root@localhost bin]# ll