bash - Nested ssh run commands on 2nd server -

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i can hostb hosta, , want run commands on hostb.

ssh -t $hosta ssh -t $hostb "     echo 'hello world!'     echo 'test!'  "

at moment, connect hosta hostb , script pause. type exit (from hostb) return hosta, 2 echo commands printed , automatically exits hosta.

how can run commands on hostb?

changing code using here document , sshpass can trick

ssh -t user@$hosta <<eoa sshpass -p password ssh  -t user@$hostb <<eob echo hello  eob eoa

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