Ceci est une ancienne révision du document !
Q I bought 2 gaming computers running ubuntu 14.04 from an auction and they seem to be password protected. I have no clue how to bypass this as I didn't receive any login info for them. A (Thanks to kerry_s and yancek in the Ubuntu Forums) I think you need to wipe them, which should have been done before they went to auction. This is very bad for the previous owner of those computers. I hope you're a good person. It could also be bad for you, as the person who sold the computers may have left some back door or malware on them. I think either scenario is unlikely but also feel you would be better off with a new install as they could be cluttered up with all kinds of software and/or personal data. Q I cannot seem to be able to get this 1 TB thumbdrive formatted and usable. It came with exFAT on it. I am trying to get Windows NTFS on it, or even FAT32. Last resort would be EXT3. Unfortunately, I keep coming up with errors no matter what one I try. I am using gparted to do this. Any suggestions to what I may be doing wrong? A (Thanks to DuckHook in the Ubuntu forums) It's a scam; the actual capacity of the thumb drive is 8 GB.
Q How can I list all the hard drive partitions? A Run this command: lsblk Q When I try to use apt-get to install software, it doesn't work. A Run this command: sudo apt-get update
Q Should I encrypt my Ubuntu installation? A Encrypting your hard drive helps if someone steals your computer (or hard drive) and you have important personal information stored there. It has no other value. (Comments welcome!) Q Can I block a destination based on IP address? A (Thanks to gabriel40 in the Ubuntu forums) Yes, here's the command: iptables -A OUTPUT -j DROP -d w.x.y.z Q When I connect my Ubuntu phone with USB cable, I can connect with adb, but I can't browse phone folders with nautilus. A (Thanks to davidricq87 in the Ubuntu Forums) OK, libmtp is outdated. I used this ppa: https://launchpad.net/~phablet-team/+archive/ubuntu/tools and that solved my problem.
Q Do I need a FireWall on my Ubuntu? If yes can you recommend one? A (Thanks, in part, to OrangeCrate in the Ubuntu Forums) If you are connecting through a router, you probably do not need one. Ubuntu comes with a firewall called iptables, and you can configure iptables with UFW (Uncomplicated Firewall). Instructions here: https://help.ubuntu.com/community/UFW
Top questions at Askubuntu * How can I run a program and watch its activity using top? http://goo.gl/z5OcnR * How to transfer the identity (SSH) of a machine to a new machine? http://goo.gl/xitkwj * How to delete files listed in a text file http://goo.gl/7fLQfe * How do I count text lines? http://goo.gl/Z1I15D
* Google Chrome PPA upgrade invalid signature http://goo.gl/wz3hP3 * Command Line - Move here [on hold] http://goo.gl/ZDMQme * How to display the paths in $PATH separately http://goo.gl/q4lURj * Why I can't uncompress a .bz2 file using tar? http://goo.gl/KQDUIJ * Total video time in a Directory http://goo.gl/ktJBQn
Tips and Techniques Nice! I began testing the alpha version of Xubuntu in early March. Fingers crossed, it has been rock solid! Unlike, for example, Ubuntu 14.04 LTS on my AMD Phenom II X2-based system. It would be nice to credit Canonical with the improvement, but it's probably the 3.19 kernel. Years ago, Ubuntu 10.04 would run for a few hours, then lock right up. Ubuntu 10.10 ran fine, and so did 12.04. Since then, every version has reverted to the unacceptable behaviour of 10.04. One of the new features involves CPU microcode, which, I must confess, is a higher technical level than I understand. On March 9, Canonical switched from upstart to systemd, which is a huge “under the covers” shift. Smooth as silk! For my testing, I created a bootable flash drive with the Xubuntu installer. Then I installed it (yes, a true installation) onto a 32 GB USB 3 flash drive plugged into a USB 2.0 port. It's a little slower than running from a hard drive, but not terribly so. I installed the Restricted Extras and an Additional Driver for my Nvidia video card.
Since then, I have installed most of the programs I normally use. Conky, VLC, Miro, KRDC, the weather app and LibreOffice all run fine. It appears that KRDC works even better than before, since I could send a Ctrl-Alt-Del to the remote computer. Miro 6 was a big surprise: downloading multiple podcasts simultaneously takes much less CPU than before. (The heatsink on my CPU needs cleaning, so high CPU usage is a big problem.) However, Miro also crashed in a couple of interesting ways. A couple of times, there has been a pop-up claiming that Chrome has “closed unexpectedly”, but I saw no evidence that it had actually crashed. To install f.lux I had to use the Trusty repository. That's typical of third-party software when you are testing a new release. But f.lux is not actually doing what it is supposed to do.
I've been keeping it up to date, which requires frequent large downloads; it's a “development release,” after all. At the office, we have Xubuntu on some low-spec (ex-XP) laptops, and there's no visual difference with 15.04, except perhaps the available wallpapers – and that's a good thing! The application programs have been brought up to date. (LibreOffice!) I also installed the 15.04 beta of Ubuntu Kylin on an old netbook with a large monitor attached. It was not a success. Once I pressed the mystery keys to get the Unity Launcher displayed, I was computing in slow motion. Kylin demands more horsepower. Xubuntu runs fine on the netbook. By the time you read this, Xubuntu 15.04 will be released. In my opinion, the only drawback is that you must upgrade to 15.10 by late January of next year.