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sudo inside a here document not working

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Top Forums Shell Programming and Scripting sudo inside a here document not working
# 8  
Old 11-12-2010
Can you explain that a little more? I am sorry, just started shell scripting!! How to redirect stdin to provide input to sudo?
# 9  
Old 11-12-2010
Quote:
Originally Posted by mnanavati
Well the purpose is not to echo after sudoing into the vserver. The code inside there is proprietary and so I did not want to post it here

Secondly,
If I sudo on command prompt it works fine. Prompts me for a password and I enter the password an can enter the vserver correctly!
did you try ssh -tt option in your script?
# 10  
Old 11-12-2010
I've use something like this in the past, echo is a shell internal so no one will be able to see the password in a ps listing:

Code:
#!/bin/bash
read -sp "Password: " PASS
echo
echo $PASS | ssh account@myhost 'sudo somescript'

Last edited by Chubler_XL; 11-15-2010 at 12:23 AM..
# 11  
Old 11-18-2010
use NOPASSWD for sudo rule for batch jobs. don't use a HERE document that way. put the logic in a remote script and execute that remotely. also - add -n to your ssh loop.
# 12  
Old 11-21-2010
frank_rizzo,

mnanavati can't change the sudoers file:

Quote:
Originally Posted by mnanavati
Unfortunately I cannot ssh with root credentials , and I cannot change the sudoers file on servers.
So i need to sudo only after I ssh
# 13  
Old 11-22-2010
Quote:
Originally Posted by mnanavati
Have a sudo statement inside of a here document. It prompts me for a password, but doesnt wait for me to enter my password. Is there a way I can use the command without sudo or anyway that I can enter the password correctly?

Eg :
Code:
 
while read  remotehost
do
  ssh -t $2@$remotehost  <<REMOTE
 
   ls /path/to/file/ | while read line
     do
              sudo  vserver \$line enter
              echo "\$line Hello world"
      done
 
REMOTE
done < "$remotehostlist"

This asks for password for the following line sudo vserver $line enter. But it doesnt wait for me to enter password. Also if I type something it appears in cleartext.

Please help!!
I think there are maybe some errors in your script
if you think everything is ok then you can try this

Code:
while read  remotehost
do
  ssh -t $2@$remotehost  <<REMOTE
 
   ls /path/to/file/ | while read line
     do
              sudo -k
              sudo  vserver \$line enter
              echo "\$line Hello world"
      done
 
REMOTE
done < "$remotehostlist"

regards
ygemici
# 14  
Old 11-22-2010
Quote:
Originally Posted by Chubler_XL
frank_rizzo,

mnanavati can't change the sudoers file:
that is unfortunate because doing it any other way is a hack IMO. I suggest do it right the first time. work smarter not harder.
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