Archive for ubuntu

echo vulnerable

Posted in Linux with tags , , , on October 3, 2014 by xi'an

screen shot with ubuntu 10.10Even though most people are now aware of the Shellshock security problem on the bash shell, here is a test to check whether your Unix system is at risk:

env x='() { :;}; echo vulnerable' bash -c 'echo hello'

if the prompt returns vulnerable, it means the system is vulnerable and needs to be upgraded with the proper security patch… For instance running

sudo apt-get update && sudo apt-get install --only-upgrade bash

for Debian/Ubuntu versions. Check Apple support page for Apple OS.

If it ain’t broken, don’t fix it!

Posted in Linux with tags , , , , , , , , on September 6, 2009 by xi'an

I tend to minimise the instances when I have to change of Linux version on my computer (a Macbook Pro Santa Rosa), for this always is a traumatic event with potential consequences on my work, and therefore I had postponed leaving Kubuntu 7.10 (Gutsy Gibbon) in a typical procrastinating attitude,  i.e. till something stopped working! This happened yesterday with a failed attempt at upgrading R and I thus moved to Kubuntu 8.04 (Hardy Heron), using the upgrade option rather than re-installing the whole thing from scratch. The only manual steps were to change xorg.conf to accomodate the touchpad and to install madwif to get access to the wireless—the most frustrating part was finding a valid address! (Upgrading Ubuntu means that each intermediate version needs to be installed before moving to the next.) Now that everything works nicely (including suspend and hibernate, and my earlier heating problem seems to be resolved as well!), I am wondering whether or not I should move to the next version of Kubuntu 8.10 (Intrepid Ibex, terrible tee-shirt!) or even to the most recent  Kubuntu 9.04 (Jaunty Jackalope, terrible name: jaundiced jackal, jovial jabiru, jocular jellyfish, or jittery jaguar would have sounded way better! The next animal in the list of releases is a koala, although karmic would hardly have been my adjective of choice)… As an aside about this future release, an interesting announcement is that Ubuntu 9.10 would support cloud computing.

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