Hi,
I am using openSUSE 11.When I enters su command in konsole and enters the correct password it shows incorrect password. But when i do the same in kdestartup->applications->system->terminal->gnome terminal(command line terminal) it works. Also the konsole shows problems when I use vi editor. When I press i for insert mode it deletes one character and inserts one i then insert mode goes on.I am new to linux.Can you help me.

Thanks in advance.

I can't be absolutely sure about Suse, but because I use Ubuntu, I sometimes have the same issue. The trick is to do a "sudo su", which will then make the system prompt you for your own password, and as long as your user is in the "sudoers" file, you should then take on root capabilities

I tried it too.Its not working.

try changing the password by , sudo passwd user_name

try sudo -s

The KDE 4.0 included in Suse 11 makes all kinds of errors.

So if a KDE application doesn't work, e.g. konsole :
not much to do, except using another app, in this case
.. the gnometerminal or xterm.

....

sudo -s works somtime.But most of time it doesnt.Both sudo -s and sudo su works fine in gnome terminal.I am using kde 3.5 and the problem started 3 days before.I think I wanna adjust with gnome terminal.
Thanks to all for helping.

Lots of distros now restrict who can issue the 'su' command. Generally you must be a member of the wheel group.

The rule that implements this is usually found in someplace like /etc/pam.d/su.

Now, to me, being a member of the wheel group makes you more of a "power-user," and bad guys know that users tend to be lazy. They know that users tend to give themselves more power than they need because it's "convenient." This is therefore generally not a wise thing to do.

Set up a separate maintenance account that is a member of wheel if you like, that you do not normally use.