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Re: Switch user command not working user Net:SSH2 module

by salva (Abbot)
on Oct 29, 2013 at 09:21 UTC ( #1060127=note: print w/replies, xml ) Need Help??

in reply to Switch user command not working user Net:SSH2 module

Net::SSH2 runs every command in a different shell session. Read the FAQ entry "Can't change working directory" from the Net::OpenSSH docs for a more detailed explanation.

There are two ways to do what you want:

One is to start a shell on the remote shell and then simulate an interactive dialogue with it (usually, you use Expect for that, though Expect doesn't work on Windows*). This is hard and error prone, as you will have to look into the command output for the prompt in order to detect when some command is done.

The other way is to combine the sequence of commands into a single one. But, su usually asks for the password and so you will have to send it through its tty.

su root -c "whoami"

An easier way is to use sudo, that can be configured to not ask for a password, or alternatively, in recent versions, to get the passwords from stdin. For instance, using Net::SSH::Any:

my $ssh2 = Net::SSH::Any->new('192.168.XX.XXX, user => 'root', passwor +d => 'root'); print $ssh2->capture({stdin_data => "$sudo_passwd\n"}, 'sudo', '-Sk', '-U', $user, '-p', '', '--', 'whoami');

*) unless you use the perl from Cygwin.

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[1nickt]: I have been an apostate in the Apple orchard for almost 15 years. But Dells are still high quality it seems, unlike Macs these days.
[1nickt]: And you can still configure the system at will, on the "Small Business" site.
[Corion]: 1nickt: I bought a 2015 XPS 13, which is a very nice and shiney (and somewhat overpriced) machine, but I think it's still better priced than an Apple machine. Now it just has to hold up 10 years like the old one did ;)
[1nickt]: Ah, you got Linus' fave? With Ubuntu? 4k display?
[1nickt]: ( The 17" monster I just bought is for my wife, who doesn;t leave the house with it...)

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