Archive for ‘Ubuntu’ Category
Posted on 14:38, August 15th, 2012 by Many Ayromlou
Here are some quick tip(s) for copying a ton of files between unixy machines really fast. You’re probably thinking “why not use rsync?”…..well rsync can be miserably slow if your source or destination cpu is underpowered. You can always do a rsync after these commands to make 100% certain that everything checks out, but try using one of these methods for the initial copy:
Once your favourite process (above) is done you can do a quick rsync to tie up any loose ends.
Rsync will now fly through the filesystem as 99.9% of the time, 99.9% of the files on the destination are good. And as always make sure you understand the commands before you use them…..and keep backups just in case :-).
Posted on 19:04, November 1st, 2010 by Many Ayromlou
If you try to install Ubuntu 10.10 under parallels desktop 6.0 on OSX — atleast as of the writing of this article — you’ll soon discover that although your entire installation is done in a high (eg: 1920×1080) resolution, as soon as the install is done and you reboot, your VM is stuck at 1024×768. You can install the parallel tools using the menu option and it still won’t help — although it helps with 3D (ie: compiz). Under Gnomes System/Preferences/Monitors the highest resolution available is 1024×768 :-(. After searching around the net for the past week or so and trying just about every remedy — which did not work — I was about to give up, then I found the magic command that “makes it go” :-).
I’ve now got Ubuntu 10.10 running with PT/compiz under parallels 6.0 @ 1920×1080. No problem. Normally if you go inside ~/.config/ directory (.config folder under your home directory) you’ll notice that there is no “monitors.xml” file in there. That’s the per user X config file that gets the ball rolling. Generating the file is really easy. Open a teminal and issue the following command:
This will generate (hopefully) the following output:
Note that 1024×768 is the default. Now if you go inside ~/.config/ directory you’ll find a “monitors.xml” file (below). Once you’ve got this file you can go to System/Preferences/Monitors and choose the higher resolution options (eg:1920×1080). The xrandr command should generate the file for you. If it doesn’t (not sure why), here is my version for parallel 6.0. I think it’s pretty generic so you should be able to cut and paste the content:
Posted on 14:10, November 1st, 2010 by Many Ayromlou
If you’ve recently installed Ubuntu 10.10 and have installed Nvidia and/or ATI drivers — or installed ubuntu under emulation — you’ll end up with a (butt) ugly splash screen. In my case under parallel 6.0 I ended up with a text boot screen that just read “Ubuntu 10.10″……Ughhh. Here is a quick tutorial on how to get a nice splash restored. This procedure also works in 10.04. Keep in mind that I’m doing everything with 1280×1024 screen size. your mileage might vary (ie: you might want 1024×768). You’ll need to get a terminal session opened for this:
Your /etc/default/grub file should look like this once you’re done (partial screenshot):
Your /etc/initramfs-tools/modules file should look like this once you’re done:
Reboot and Enjoy :-)
Posted on 13:24, January 14th, 2010 by Many Ayromlou
For those of you who don’t know OpenShot Video Editor(TM) is an open-source program that creates, modifies, and edits video files. OpenShot provides extensive editing and compositing features, and has been designed as a practical tool for working with high-definition video including HDV and AVCHD.
Jonathan Thomas and crew have reached their 1.0 milestone (congrats :-)). The program is rock solid and is running beautifully on my Ubuntu 9.10 installation.
OpenShot’s Features include:
There are 4 ways to install OpenShot: LiveDVD, PPA, DEB Installer, and the Build Wizard. Grab it here.
Posted on 23:03, November 26th, 2009 by Many Ayromlou
I recently upgraded netbook using the distribution upgrade and didn’t like the results, so I reinstalled Ubuntu Notebook Remix 9.10 Karmic Koala. Well, I’m sorry but I don’t think this Koala was ready for release. First there was the issue of where the heck are all the beloved Ubuntu tools. Gone is the Add/Remove software progy (you have to install manually), now we have Ubuntu Software Centre. Gone is being able to check off multiple packages for batch install, USC installs apps one at a time (which takes two mouse clicks per app).
To top it off — atleast in UNR 9.10 — there is no install button once you click on the arrow beside the packages. No, it’s not a problem with root/admin, I tried running it as root and same thing, NO INSTALL BUTTON on the install screen. Anyways it turns out once you get past the gargantuan Windows XP like update (125 updates) using the following two commands, the Ubuntu Software Centre magically comes back to life and gives you the “oh so important” install button. Come on Ubuntu…..I thought you were friendly. This Koala Bites HARD!!! :-). So the magic commands are….yeah you guessed it:
BTW. If at some point the upgrade asks to replace /etc/defaults/grub say “yes” and go with the newer version. It does not harm the system.
Posted on 13:58, October 31st, 2009 by Many Ayromlou
Downloaded and installed 9.10 yesterday and what do you know, someone decided to take away Ctrl-Alt-Backspace — or what I call “Three Finger Salute for Linux”. Whhhaaattt!!!!
How the heck are you supposed to kill and restart X without that…..A coworker suggested Alt-PrintScreen-K, but that just restarts GDM, not really useful when X decides to go south. Damit!!
The reason given on Ubuntu wiki is that “This is due to the fact that DontZap is no longer an option in the X server and has become an option in XKB instead.”
Well, fear not, whoever disabled it also created a easy way to reenable it again. Here is what you do:
Posted on 12:19, September 28th, 2009 by Many Ayromlou
Okay if you know about gksudo, fine. I just found out about it a little while back when I was trying to run ethereal. You see under Ubuntu (and a lot of other Linux distros) the concept of root user has been removed. There is no root (well there is, but you can’t access it), unless you specifically modify your system to activate it. That’s fine (most of the time), since you can use sudo to accomplish almost anything as the administrator. One thing that doesn’t work properly are the graphical applications that need root access. So here is where gksudo comes to rescue. In the case of ethereal I would issue the following command to get it to prompt me for sudo and run as root user:
Posted on 12:10, September 28th, 2009 by Many Ayromlou
I love Ubuntu, but there is one thing that really bugs the hell out of me. The default configured editor in Ubuntu is nano, a Pico clone. I hate Pico, therefor I hate nano :-). So how would you go about fixing this and changing the default editor to vi (or vim):
That’s it…..Have fun.
Posted on 13:54, June 19th, 2009 by Many Ayromlou
So after yesterdays rant, I went back and figured out how to install the Cacti monitoring software (OSS, Free) onto a Ubuntu 9.04 “Jaunty Jackalope” Desktop installation. This guide uses packages only, no compiling, no Makefiles or anything like that…..You should be able to just follow this and get a fully functioning Cacti installation in about 30 minutes. Here are the steps:
Posted on 16:44, May 20th, 2009 by Many Ayromlou
This used to be a pain in the butt. Lots of manual apt-get lines and config edits to get it to work. Weŕe talking about installing the LAMP stack onto a preexisting Ubuntu Desktop Edition installation. I used to do this backwards in the old days by installing the Server edition first (with LAMP) and then getting the graphical desktop goodies installed on top of that. That method still works, but I found out that LAMP stack install on a Desktop edition is a simple one command affair. As of the 7.04 release, the Ubuntu base system includes Tasksel. You can install LAMP using tasksel.
Posted on 15:52, May 20th, 2009 by Many Ayromlou
I came across this problem this morning, while writing the newly downloaded moblin USB image file. The concept is straight forward, plugin a 1GB+ USB stick into a functioning Linux or Windows box, make sure the stick is not mounted and use dd to write the disk image to the stick. Under OSX however the instructions for unmounting are slightly different, so here are the quick steps:
That should do it…..
Posted on 15:40, March 7th, 2009 by Many Ayromlou
If you’re using Ubuntu and have recently upgraded your IpodTouch or Iphone to 2.x firmware, you might be interested in this detailed tutorial. It basically outlines how you can setup syncing under Ubuntu with your 2.x device. The guide assumes that you have jailbroken your ipod/iphone . There is also a nice section for older 1.x devices.
Thanks to Sugar Labs you can now have your Ubuntu 8.10 or Fedora 10 linux distributions with sugar on it…..Shweet :-). Yep you heard right, go here and grab your OLPC XO inspired 1GB USB stick image and boot all those old PC’s into sugar. According to Walter Bender (the creator of Sugar OS) a new version dubbed Sucrose 0.84 is on its way soon. Complete article (including interview with Mr. Bender) is over at XConomy.
Posted on 13:55, February 18th, 2009 by Many Ayromlou
As good as Ubuntu (and linux) are in general, once in a while you just get to a point where you need a reinstall. That’s when the realization kicks in that you’ve got far too many packages installed since the initial Ubuntu install. It’s okay, there is a way out. Make sure you have a USB key.
On Ubuntu Workstation (with graphical interface):
Run Synaptic package manager. Once inside Synaptic, go to File/Save Markings As menu option and choose a filename and location (USB stick). MAKE SURE YOU ALSO CHECK THE BOX “SAVE FULL STATE, NOT ONLY CHANGES”. This will save a text file that contains every single package installed on your system (through apt system and all it’s variants….manual compile/installs are something else). Now you can go ahead and reinstall the machine and configure your repositories. Once the machine is up and running again, load up Synaptic and go to File/Read Markings and point it at the file you saved on the USB stick and press Apply.
This will start a download process that will set the machine up (as far as installed packages are concerned) just like it used to be. Configurations need to be done manually, but atleast you get all your packages back.
This is also super handy if you’re duping identical systems. Remember that you can not do this to upgrade from one version to another. This is strictly for “Restoring” installed software packages from the same version of Ubuntu.
On Ubuntu Server (command line):
First we need to create a list of all the installed APT packages and configurations and save them:
Now reinstall the OS, copy your backed up debconfsel.txt and dpkglist.txt file to your fresh system’s /tmp directory and execute the following:
If you’ve ever installed Ubuntu and started cursing right after because some piece of software you thought was in there wasn’t, then Super Ubuntu might be for you. It’s basically Ubuntu with a bunch of useful applications pre-installed. You even update through the standard Ubuntu methods. The only downside is that the distro is 32-bit only for now. Below you’ll find a list of pre-installed additional software you get with Super Ubuntu:
So head on over and grab the ISO file.
Posted on 16:45, September 22nd, 2008 by Many Ayromlou
Here are some quick CLI commands to get those CD/DVD images mounted under Linux (without having to burn them first).
Okay, now for a bit of CLI goodness. Here is a quick list of basic apt commands. Debian and most derivatives (Ubuntu) use these for package maintenance.
#get source code
Posted on 11:46, August 28th, 2008 by Many Ayromlou
I’d covered Fedora’s Live USB creator a while back. But for those of you wanting to install other flavours of linux on a USB stick (or a HD even), the process was lengthy and cumbersome. That was before UNetbootin, the Universal Netboot Installer. You see UNetbootin can be run from Linux or Windows and will enable you to install a fully functional linux distro to a USB stick or even a spare partition.
The current version has built-in support for the following distributions:
So go ahead and try some of those acquired flavors of Linux, or that FreeBSD you always wanted to install, but were too scared to. After all it’s only a USB stick, if it screws up just format and reinstall in 5-10 minutes using UNetbootin again.
UNetbootin can also be used to load various system utilities, including:
So have fun and happy installing…..
Posted on 16:49, June 26th, 2008 by Many Ayromlou
Well kids are you ready for todays lesson in transcoding DV video. So first you need a decent machine. I’m using a P4 2.4Ghz oldie that has Firewire on-board and am chewing up 50% CPU for NTSC encoding. Then you need to get Ubuntu 8.04 installed. Once that’s done use the following command to install vlc (Video Lan Client):
The above command (in case you’re wondering) will literally open device zero on the firewire chain and redirect it’s raw output into the VLC program. VLC is told to accept input from a pipe in rawdv format and to transcode it to mpeg4 Video @ 1Mb/s with mpeg1-layer3 audio @ 192 Kb/s.
Once the above command is running you’ll need to go to your receiving machine (the machine who’s IP you supplied in the command above), run VLC and from the File menu choose “Open Network Stream” and go with the default UDP/RTP on port 1234 (or whatever port you chose in the encoder command line).
Another neat thing you can do with your new found opensource goody bag is capture DV from your camera/settop box and save it in mpeg4 format for archival purposes (or mpeg2 for editing maybe). I’m not gonna get into the details, but assuming you’ve done the above commands, skip the encoder command and issue the following command to get your DV stream saved:
Posted on 14:41, June 12th, 2008 by Many Ayromlou
These should probably also be installed under other linux distros (might already be). But for the sake of completeness here they are:
1) denyhosts: great little package that’s already 98% configured after apt-get install process. It runs as a daemon and monitors /var/log/auth.log file for unsuccessful ssh logins and takes measures to ban the originating IP in /etc/hosts.deny. The cool part is that it does not need access to firewall or anything. Config file is /etc/denyhosts.conf and is pretty self explanatory. Ubuntu package is called “denyhosts” and needs python to work.
2) chkrootkit: another little gem that you install via apt-get install process. Ubuntu package is called “chkrootkit”. After install do “man chkrootkit” for more info, but the gist of it is that when run from command line it uses it’s own utils (located in /usr/lib/chkrootkit) to see if the system is infected.
3) rkhunter: this util is really a giant shell script, but it’s really nice and easy to use. Again use Ubuntu package name “rkhunter” to install it. It’s config file goes into /etc/rkhunter.conf and is pretty nicely setup by default. Next run “rkhunter –update” to update the discription/signature files from their website, then run “rkhunter –propupd” to grab a snapshot of the various files installed on your system. This will be used later, every time you run the command to see if anything has been changed by trojans/rootkits. Finally run “rkhunter –check” to actually run all the tests and see if you’re good to go. At the end if there are warnings check /var/log/rkhunter.log for a list of explanations about those warnings (suspicious filenames, hidden file locations, etc.)
Have fun and remember kids Vitamin U(buntu) is good for you.