linux - Remote ssh through multiple machines -

i trying ssh machine machine b , execute ssh command machine b onto machine c execute command on machine c, in 1 step machine a. not working after machine b. getting stuck there. output shown below:

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[root@a ~]# ssh  -t -t  root@192.168.40.152 << eof ssh -t  -t  root@192.168.40.153 << hk hostname hk eof  root@192.168.40.152's password: ssh -t  -t  root@192.168.40.153 << hk hostname hk last login: fri apr 14 08:53:33 2017 192.168.40.151 [root@b ~]# ssh -t  -t  root@192.168.40.153 << hk > hostname > hk root@192.168.40.153's password: redhat 

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it stopping @ above point , not executing command 'hostname' on machine c.

appreciate help.

thanks

you can try

ssh -j root@192.168.40.152 root@192.168.40.153 "hostname" 

this proxyjump through 192.168.40.152 , execute hostname command on 192.168.40.153.

please note need have @ least openssh version 7.3 in order have -j option.