execute one-line ssh command with variable from local environment

Question

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 [email protected] '/some/command -<here_i_want_to_have_value_of_$MY_VAR_variable>'

Thanks!

Double "'s are your friend here.

bmargulies
– bmargulies

2011-10-11 12:30:16 +00:00
Commented Oct 11, 2011 at 12:30 — bmargulies
– bmargulies, Commented Oct 11, 2011 at 12:30

Kurt Stutsman · Accepted Answer · 2011-10-11 12:31:21Z

12

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 [email protected] '/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.

answered Oct 11, 2011 at 12:31

Kurt Stutsman

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Sjoerd · Accepted Answer · 2011-10-11 12:30:32Z

5

Use double quotes around the command:

ssh -i /ebs/keys/test [email protected] "/some/command $MY_VAR"

The local shell will expand the variable within double quotes.

answered Oct 11, 2011 at 12:30

Sjoerd

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