execute one-line ssh command with variable from local environment

Let's pretend that in the current shell, I have a variable.

$ echo $MY_VAR
$ 2

What I want is to pass the value of this variable to an argument of a command I'm executing through ssh, like:

ssh -i /ebs/keys/test root@some.ip '/some/command -<here_i_want_to_have_value_of_$MY_VAR_variable&g开发者_StackOverflow中文版t;'

Thanks!

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Assuming you cannot use double quotes around the entire command to ssh, you could break just $MY_VAR out like this:

ssh -i /ebs/keys/test root@some.ip '/some/command -'"$MY_VAR"

If the rest of the command to ssh does not contain tokens that will be interpreted within double quotes, you can enclose the entire command in double quotes instead of single.

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Use double quotes around the command:

ssh -i /ebs/keys/test root@some.ip "/some/command $MY_VAR"

The local shell will expand the variable within double quotes.