sudo broken -- how to fix?

[PaulFXH]

Yesterday, I installed MacPorts. However, due to a copy/paste error I seem to have installed the MacPort sudo.
So, for a while when I used sudo in a terminal I got this error:

sudo: can't stat /opt/local/etc/sudoers: No such file or directory

So, I unstalled MacPorts and re-installed it again without installing the MacPort sudo.
However, it didn't really fix the problem as now when I use sudo in a terminal I get

-bash: /opt/local/bin/sudo: No such file or directory

This looks like my Paths are messed up but apparently the desired path (/usr/bin) is still there:

$ $PATH
-bash: /opt/qt4/bin:/opt/kde4/bin:/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin: No such file or directory

I can, of course, still get sudo to work in a terminal just by typing "/usr/bin/sudo" rather than just "sudo".
Nevertheless, I want to get back to just using sudo.
Can anybody please help?

 

[boast]

did you uninstall sudo via macports?

 

[PaulFXH]

did you uninstall sudo via macports?

Well, that indeed was my intention but when I try

/usr/bin/sudo port uninstall sudo

I get

Error: port uninstall failed: Registry error: sudo not registered as installed

I'm confused

 

[boast]

what do you get with which sudo or echo $PATH

 

[PaulFXH]

Well, it seems to be fixed now, but I really do not at all understand how.
In desperation, I tried a dv switch in the uninstall command

$ /usr/bin/sudo port -dv uninstall sudo

which gave this output

DEBUG: Registry error: sudo not registered as installed.
while executing
"registry::installed $portname $v"
(procedure "portuninstall::uninstall" line 5)
invoked from within
"portuninstall::uninstall $portname [composite_version $portversion [array get variations]] [array get options]"
Error: port uninstall failed: Registry error: sudo not registered as installed.

However, now I can use sudo without /usr/bin/sudo and everything seems normal.
If anybody understands why this seems to have worked, please post.

 

[PaulFXH]

@boast
I didn't see the edit to your last post until after I posted.
Here's what I get now after the fix:

$ which sudo
/usr/bin/sudo

$ echo $PATH
/opt/qt4/bin:/opt/kde4/bin:/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin