unusual response to sudo yum update

jyunker · 01-15-2014, 08:16 AM

Yesterday, I ran some commands to restore permissions of my files on my Centos 6.5, 64 bit system.

I had mistakenly typed chmod -R +w 777. So I needed to restore permissions or reinstall the system.

It seemed to work. The commands can be found here.

http://www.adminlinux.org/2009/07/ho...lt-system.html

I got through it and ran both lines of commands. It works, I am not sure how, but it works.

Now when I came in the morning and typed

Code:

sudo yum update
sudo:effective uid is not 0, is sudo installed setuid root?

I am wondering how to fix this.

Any help appreciated. Thanks in advance.

Respectfully,

jyunker

angel115 · 01-15-2014, 08:54 AM

Hi jyunker,

check the permission of your sudo command:

Code:

$ ls -l /usr/bin/sudo
-rwsr-xr-x 2 root root 127668 2013-02-27 21:41 /usr/bin/sudo

It should look like above
if it doesn't log as root and set the right permission:

Code:

$ su -
# chown root:root /usr/bin/sudo
# chmod 755 /usr/bin/sudo
# chmod u+s /usr/bin/sudo

jyunker · 01-15-2014, 09:33 AM

I just checked what you said and its resonse:

-rwxr-xr-x.1 root root 123832 ..

It looks like it is correct. What else do I do?

Respectfully,

jyunker

angel115 · 01-15-2014, 10:17 AM

Hy jyunker,

Nop, the stiky bit is not set:
Your config:
-rwxr-xr-x

The way it should be:
-rwsr-xr-x

Type the following as root should solve the issue:

Code:

# chmod u+s /usr/bin/sudo

Best regrads,
Angel.

jyunker · 01-15-2014, 10:40 AM

In order to do that must I run sudo? As I said sudo does not run.

If I do not need to run sudo I guess that will work.

Do I need to run sudo?

sudo chmod ...

Respectfully,

jyunker

angel115 · 01-16-2014, 12:51 AM

No, do not use sudo command as that doesn't work.
Login as root using the su - command:

Code:

$ su -
password:
# chmod u+s /usr/bin/sudo