I followed these instructions and found that my glibc version was 2.15-0ubuntu10.9. How do I update it to 2.15-0ubuntu10.10?

It is also mentioned here that services have to be restarted after the update. How do I know which services I have to restart?

1 Answer 1


If you're on 12.04 or 10.04, you don't need to do anything special to upgrade. The usual procedure applies:

sudo apt-get update
sudo apt-get upgrade

Or, specifically:

sudo apt-get install libc6

To verify, run apt-cache policy:

$ apt-cache policy libc6
  Installed: 2.15-0ubuntu10.10
  Candidate: 2.15-0ubuntu10.10
  Version table:
 *** 2.15-0ubuntu10.10 0
        500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
        100 /var/lib/dpkg/status
     2.15-0ubuntu10.9 0
        500 http://in.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages

The USN notice is more cautious, and given the core nature of libc, I second it:

After a standard system update you need to reboot your computer to make all the necessary changes.

  • I was hoping to avoid the reboot. But thank you.
    – topher
    Jan 27, 2015 at 17:42
  • @topher libc is second only to the kernel, IMHO, in importance. With both, the only real option is restarting, since you never know what's hanging around using the old version.
    – muru
    Jan 27, 2015 at 17:44
  • I'm getting Installed: 2.11.1-0ubuntu7.20 even after running update and upgrade—and I am running Ubuntu 10.04.4 LTS. Any advice? Jan 28, 2015 at 17:55
  • 1
    @RubenVerborgh that is the correct version for 10.04. The example output shown above is for 12.04, sorry about that.
    – muru
    Jan 28, 2015 at 17:58
  • Thanks! Seemed weird to me that the version numbers didn't match. Jan 28, 2015 at 18:04

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