net-ssh and remote environment

Question

I want to execute some remote command on my server using net-ssh library.

I have the following example:

Net::SSH::start(host, user, options = {:keys => '~/.ssh/id_rsa'}) do |ssh|
  puts ssh.exec!("echo $PATH")
  ssh.loop
end

The result is: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games

My problem is that I have not my PATH loaded as it should be.

I should also have some RVM paths, and custom paths defining into my .zshrc.

How could I change this behavior to let net-ssh to use my .zshrc to load my default environment ?

Solution:

puts ssh.exec!("source ~/.zshrc; echo $PATH")

Vlad Khomich · Accepted Answer · 2011-07-28T06:18:16.613

7

have you tried something like:

ssh.exec!("source /home/you/.zshrc")
puts ssh.exec!("echo $PATH")

?

edited Jul 28 '11 at 06:18

answered Jul 28 '11 at 06:05

Vlad Khomich

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Thanks for your contribution. Each exec! command are independent. That means that the environment is reset each time. I've updated my question explain how I solved the problem. But thanks for your help :-) – Arkan Jul 29 '11 at 03:33

score 2 · Answer 2 · edited Mar 01 '12 at 21:21

2

Found a way around this problem, actually. It's quite nice solution. Thanks to Vald for telling me that every exec is independent of itself, so then you can just use && to link the commands together.

For example, I have a ruby script that is runnable, and I'm using zsh, so I just use this:

ssh.exec("source .zshrc && ./backup.rb")

Works like a charm! Of course you can also be on the safe side and use the full path or ~, but it gets the job done.

Edit: Sorry, also just saw you put a solution above. Is there a difference between using ; and &&?

edited Mar 01 '12 at 21:21

Mark Ursino

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answered Mar 01 '12 at 03:55

Allen

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When using `&&`, the second will only fire if the first succeeds. When using `;`, the second command will fire regardless of the exit code of the first. – rohitpaulk Jul 27 '17 at 11:08
Yep. Learned that eventually haha – Allen Jul 27 '17 at 11:16

score 1 · Answer 3 · answered Jun 02 '13 at 23:32

1

Don't use Net/SSH for running multiple commands.

Try net-ssh-session.

Commands are not independent and it loads your user's env vars.

answered Jun 02 '13 at 23:32

gcstr

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net-ssh and remote environment

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