pxssh submit su commands = very very slow

[Dan Stromberg]

On Sat, 28 Jun 2008 19:08:59 -0700, gert wrote:

> this does the same except 100 times faster ?
> 
> I don't understand the logic about the prompt, its not the same as the
> output from the bash shell ?
> 
> root at r12276:~# cat ssh2.py
> import pexpect
> import sys
> 
> child = pexpect.spawn("ssh gert at 127.0.0.1") #child.logfile = sys.stdout
> 
> i = child.expect(['assword:', r'yes/no'],timeout=120) if i==0:
>     child.sendline('123')
> elif i==1:
>     child.sendline('yes')
>     child.expect('assword:', timeout=120) child.sendline('123')
> child.expect('gert at rxxxx.ovh.net: ~') print child.before
> 
> child.sendline('ls -l')
> child.expect('gert at rxxxx.ovh.net:')
> print child.before
> 
> child.sendline('su')
> child.expect('assword:')
> child.sendline('123')
> child.expect('gert at rxxxx.ovh.net: /srv/www/gert') print child.before
> 
> child.sendline('ls -l')
> child.expect('root at rxxxx.ovh.net:')
> print child.before

You could try changing the prompt (pxssh appears to have a way of doing 
that), but I prefer to set up passwordless, passphraseless ssh and do 
each command separately.  For the rootly portions, you might look into 
passwordless sudo if you go that route.

Here's something about setting up passwordless, passphraseless ssh:

http://stromberg.dnsalias.org/~strombrg/ssh-keys.html