Category: Linux

  • Raspbian Jessie w/ external / on btrfs ?

    Raspberry Pi 2 fun this weekend!

    Quite successfully managed to relocate / to an external disk.  In my case, the external disk is an old 1TB hard drive in one of these snazzy docks (does not pass S.M.A.R.T. data).  Then I tried it with an SSD to see if it was any faster.  It was, but not enough to justify its immigration from my desktop as a cache device.
    That’s all well and good, but I’d like to achieve some redundancy.
    First, I started with MDADM, that didn’t work.  Then I moved to btrfs.  Seemed promising, but I get a kernel panic during boot.
    Guides used:
    Will do more fiddling later..
  • I made a thing

    A while back, I got the itch for some retail therapy and bought a 2U, 12-bay Supermicro from the nice folks over at Garland Computers.  Couple of quad E5-somethings, a tooon of RAM, and a bit of capacity in the form of a ZFS array smeared over a mish-mash 1- and 2TB hard drives.  Things were great, until the sound got to me..  and its not a fan I could do anything about; it was the fan inside the hot-swap power supply :(.  It was way more storage than i needed, massive energy hog, and that damn fan.. so it went to being on all the time, to being on most of the time, to not being on at all.

    Maybe it was all the stuff about this being the 25th anniversary of Linux and all, I felt the need to redo my desktop.  Initially it was Kubuntu Xenial on the cheapy 240gb SSD..  then I realized how many 1TB drives I had sitting around.  I tore it down and rebuilt it using these fantastic instructions on how to install Ubuntu root on ZFS.

    travis@chisburger:~$ sudo zpool status -v
    [sudo] password for travis:
     pool: rpool
    state: ONLINE
     scan: resilvered 7.89G in 0h3m with 0 errors on Sat Sep  3 11:15:20 2016
    config:

           NAME                                              STATE     READ WRITE CKSUM
           rpool                                             ONLINE       0     0     0
             mirror-0                                        ONLINE       0     0     0
               ata-ST31000528AS_5VP05QRD-part1               ONLINE       0     0     0
               ata-ST1000DM003-9YN162_W1D1M3Q0-part1         ONLINE       0     0     0
           cache
             ata-SPCC_Solid_State_Disk_15022293000000000380  ONLINE       0     0     0

    errors: No known data errors

    travis@chisburger:~$ sudo zpool list -v
    NAME   SIZE  ALLOC   FREE  EXPANDSZ   FRAG    CAP  DEDUP  HEALTH  ALTROOT rpool   928G   536G   392G         –    26%    57%  1.00x  ONLINE  –  mirror   928G   536G   392G         –    26%    57%
       ata-ST31000528AS_5VP05QRD-part1      –      –      –         –      –      –
       ata-ST1000DM003-9YN162_W1D1M3Q0-part1      –      –      –         –      –      –
    cache      –      –      –         –      –      –
     ata-SPCC_Solid_State_Disk_15022293000000000380   224G  9.70G   214G         –     0%     4%

    This is running in a desktop with a 4690k with 20gb of RAM.  I’m very curious to see what effect, over time, that cache device will have on responsiveness.

    Through the course of setting this up, one of my 1TB drives failed, and I was able to replace it no problem.  I just needed to remember to run ‘grub-install’ on the new drive.

    Hope everyone is having good luck with their projects!

  • per-program memory usage analyzer

    ps_mem!

    “A utility to accurately report the core memory usage for a program
    Yes the name is a bit weird. coremem would be more appropriate, but for backwards compatible reasons the ps_mem name remains.”

    https://github.com/pixelb/ps_mem

  • First Day at New Job Tomorrow!

    As per career advisers advice, I used connects in the community to learn about my area of interest, and sure enough, I got a job!  And the first day of that new job is tomorrow!

    I do still have a handful of remaining shifts with my previous employer, but that will end in less than two weeks.

    Tonight I deleted the recurring events in my Google Calendar for my previous job.  Kinda sad, actually.  That’s my main circle of friends.  I can always go back to visit, and I fully expect to, but I will miss them.

    However, this is a very very positive step.  I’m a bit nervous but very very excited to begin this new chapter of my life.

    Gonna be a bit hard to sleep tonight.

  • Dell D620 Flair

    Ordered some Rinse.FM, Ubuntu, and Kubuntu stickers today too, and good buddy Robbie says that he’s going to bring me more tomorrow 😉

  • K Desktop Love

    Yup, I think I might have a soft spot for KDE..

  • DHA Meetup! Lubuntu! Aced the LFS101x Final! Bigger HDD for the D620!

    Went to my first MeetUp last night

    Monthly meeting of the Dallas Hackers Association!  Lots of fun!  Discussed the recent developments in the Linux world and other experiences in IT/infosec.  I’ve made it a recurring event on my calendar.  There are more events that I’m considering going to, but I’d need to do some rearranging of my work schedule to give me more time to do stuff on the weekends, and that might be a tall order (pun intended ZING).

     

    Lubuntu on the D620

    Very responsive.  Current (at least until Lubuntu 14.10 is released).  Doesn’t have dependency issues.  Wi-Fi works.  I’ve been very pleased with it!  No random freezes like I had for some reason on my desktop.  I suppose the only other thing that I could do is get more RAM for it.  LXDE is snappy enough, and DDR2 is stupid expensive..  I’ve spent about $50 on parts that are unique to this computer (batteries).  The hard drive that’s supposed to get in today is transferable so I see that as more of an investment than a purchase since I can use that going forward.  Hell, I could even make it into an external.

     

    Kubuntu on the Desktop

    Contemplating what might be a better utilization of that computer.  Has Kubuntu, CentOS 7, and Win7 Pro.  Most of the desktoppy data is in Windows.  Thinking about using that computer as a landfill for my data.  Also an excuse to play with RockStor?  Love the concept of a roll-your-own Drobo.  I do REALLY like KDE.  I do really get the sense that its very mature, albeit a bit big..  Ars has a great article about the next iteration of KDE, Plasma 5.  Can’t wait for the wrinkles to get ironed out of that.

     

    Successfully completed LinuxFoundationX: LFS101x Introduction to Linux

    Got every question correct on the first attempt! Not exactly sure what I want to do next.  I do still need to finish Hitchhicker’s Guide to the Galaxy…  Perhaps something a little more..  I was going to say ‘useful’.  I should look for more things like it.  More activities to work through.  As I may have mentioned before, I knew a fair amount of it going into it, but there was certainly a ton of stuff that I didn’t know, and I appreciated the distinctly *nix flavor of it.  I hope that The Linux Foundation comes out with more offerings on edX.

     

    Hard Drive set to arrive today!

    Going from 80gb to 1tb 😉  Watched a video of the install and looks super easy, just undo a couple of screws, slide it out, replace the hard drive in the carrier, pop it back in, tighten everything up, and you’re good to go!  Of course I’ll have to install everything again, but hey, that’s half the fun right?  I think Unix Stickers might help me totally complete the package 😉

  • Rockstor web-ui demo video


    Idea for the hard-drive filled desktop?

  • Firefox ESR 31.1.0

    Mmm..  Firefox ESR 31.1.0..  I feel so current!

    Even better, it doesn’t feel any less responsive, I’ll take it!