如何在bash中将变量从远程主机转移到本地主机

Question

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

将本地变量的值从远程主机获取到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"'