如何采取可变从远程主机到本地主机在bash

Question

a=5 
ssh abc@ip << EOF 
b=7 
echo "Remote Host b is $b " 
EOF 
echo "Local host b is $b " 

以从远程主机的局部变量的值到localhost

Answer 1

r=$(ssh abc@ip 'b=7; echo $b') 
echo "Remote Host b is $r" 

或

ssh abc@ip 'b=7; echo "Remote Host b is $b"'