Santosa Sandy's questions

Maybe I wasn’t rigorous enough in reading the page, but I can’t edit the Ubuntu Wiki Official Documentation.

I logged in using my UbuntuOne Account and using my Launchpad Account but still I can’t edit the page.

Let us take an example on this page: https://help.ubuntu.com/community/MpichCluster

I found an error in the keychain set code instruction on MPICH Cluster arrangement. The instruction asks us to put some code in the ~/.bashrc file. It was written as:

if type keychain >/dev/null 2>/dev/null; then
  keychain --nogui -q id_rsa
  [ -f ~/.keychain/${HOSTNAME}-sh ] && . ~/.keychain/${HOSTNAME}-sh
  [ -f ~/.keychain/${HOSTNAME}-sh-gpg ] && . ~/.keychain/${HOSTNAME}-sh-gpg

We should add fi to complete this code. Otherwise it will give us error. I want to add that fix. I also want to add a comment that this action should be done in the master machine, not in the helper machine (I prefer to use “helper machine” instead of “slave machine”).

Maybe somebody can help to do this. Thank you

I have a computer (computer A) which only can be accessed by ssh from another computer (computer B) within internal network.

ssh username@10.**.**.**

FYI, I do not activate root account in computer A.

Later on, when I already login to the computer A, I modify the /etc/fstab file by adding sudo -i as additional line in it.

Finally, I reboot the computer A. Several minutes later, I try to login to computer A again but I can not.

Is it related to my modification or there is internal network down at the moment? Thanks

I try to execute

mpdboot -n 2 -f /home/user/mpd.hosts

and then

mpdtrace

However, both of them return:

Alarm clock

I have a virtual machine with mpd installed on it. I copied the .vdi (the hard drive) to another machine.

I try to check whether my root has password or not.

I run this command;

sudo passwd root

Later on it responses as;

Enter new UNIX password:

Based on that response, I have an indication that my root has no password. Therefore I want to quit from the command process.

How can I do that, please?

I have a Ubuntu virtual machine with ssh installed. (Ubuntu 12 with GUI)

• I clone it and renew the clone IP address.

• I want that the Master can have ssh to the clone without asking password.

• I had set id_dsa.pub and authorized_keys in the clone machine.

However it still ask me password when I try to ssh from the master machine to the clone machine.

Can I have any suggestion? Thanks

Suppose that I had set the root password before with ssh key. Hereinafter, I want to let the root without password. Is there a way to do that?