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I installed Steam using Ubunt Software Center, but whe tried to launch, it showed this error in Terminal

Steam needs to install these additional packages: 
    libgl1-mesa-dri-lts-quantal:i386, libgl1-mesa-glx-lts-quantal:i386
sudo: unable to change to sudoers gid: Operation not permitted
sudo: setresuid() [0, 0, 0] -> [115, -1, -1]: Operation not permitted

sudo: unable to change to sudoers gid: Operation not permitted
sudo: setresuid() [0, 0, 0] -> [115, -1, -1]: Operation not permitted
Press return to continue: 

What am I supposed to do?

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1 Answer 1

I don't know anything about getting Steam working, but since it's saying it needs packages that you don't have installed, try installing them:

sudo apt-get install libgl1-mesa-dri-lts-quantal libgl1-mesa-glx-lts-quantal

If you're not comfortable running that command in a terminal, open the software center, look for these two packages, and install them:

libgl1-mesa-dri-lts-quantal
libgl1-mesa-glx-lts-quantal
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I was just about to suggest this. I use Steam and have not had this error show up but it looks like some of the files for mesa are missing....without them Steam will not run. I think this will fix the OP's issue.. +1 –  TrailRider Aug 20 '13 at 22:41
    
I DID have this error, I was able to get around it by explicitly installing those packages. –  TheFiddlerWins Aug 21 '13 at 1:15
    
When I try to run the command, Terminal gives an error guest-0PJgJU@Raul-Laptop:~$ sudo apt-get install libgl1-mesa-dri-lts-quantal libgl1-mesa-glx-lts-quantal sudo: unable to change to sudoers gid: Operation not permitted sudo: setresuid() [0, 0, 0] -> [115, -1, -1]: Operation not permitted guest-0PJgJU@Raul-Laptop:~$ –  Raul Aug 21 '13 at 2:25
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@Raul are you logging in as a guest? If so, try first logging in as your normal user, the one you made during the install. –  djeikyb Aug 21 '13 at 5:39
    
@djeikyb Actually I have only one account on my PC, and I really don't understand why it thinks I am a guest. –  Raul Aug 21 '13 at 20:24
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