The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘openSuSE’ Category

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Zypper or YaST locked: System management is locked by the application with pid ##### (/usr/lib/YaST2/bin/y2base).

Posted by jpluimers on 2015/08/24

A while ago, I got this error:

Accessing the Software Management Failed
System management is locked by the application with pid 17730 (/usr/lib/YaST2/bin/y2base).
Close this application before trying again.

Would you like to abort or try again?

[Retry] [Abort]

What happened is that a terminal session that had YaST open got disconnected (don’t you love WiFi) while checking for updates.

I tried to re-login and re-check for updates and got this error.

Looking for process 17730 indeed revealed it was YaST:

snap:~ # ps 17730
  PID TTY      STAT   TIME COMMAND
17730 pts/0    Sl+    0:11 /usr/lib/YaST2/bin/y2base online_update ncurses

A simple kill would get rid of that process:

sudo kill 17730

–jeroen

via: yast locked.

Posted in *nix, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »

Hmm, need to check why MariaDB got installed

Posted by jpluimers on 2015/07/06

The zypper dup has installed MariaDB; now I need to figure out which dependency did this, as I’m not happy with the update message:

Message from package mariadb:

You just installed MySQL server for the first time.

You can start it using:
 rcmysql start

During first start empty database will be created for your automatically.

PLEASE REMEMBER TO SET A PASSWORD FOR THE MariaDB root USER !
To do so, start the server, then issue the following commands:

'/usr/bin/mysqladmin' -u root password 'new-password'
'/usr/bin/mysqladmin' -u root -h misibook password 'new-password'

Alternatively you can run:
'/usr/bin/mysql_secure_installation'

which will also give you the option of removing the test
databases and anonymous user created by default. This is
strongly recommended for production servers.

–jeroen

Posted in *nix, Linux, openSuSE, Power User, SuSE Linux | 2 Comments »

reboot fixes “pam_systemd(sshd:session): Failed to create session: Connection timed out” need to find the cause.

Posted by jpluimers on 2015/06/11

In case I get something similar to this again:

Mar 11 12:54:06 filesrepo sshd[22021]: Accepted publickey for SOMEUSER from xxx.xxx.xxx.xxx port xxxxx ssh2: RSA xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx
Mar 11 12:54:06 filesrepo kernel: type=1006 audit(1394542446.943:117): pid=22021 uid=0 old auid=4294967295 new auid=1019 old ses=4294967295 new ses=116 res=1
Mar 11 12:54:06 filesrepo sshd[22021]: pam_unix(sshd:session): session opened for user SOMEUSER by (uid=0)
Mar 11 12:54:06 filesrepo dbus[421]: [system] Activating systemd to hand-off: service name='org.freedesktop.login1' unit='dbus-org.freedesktop.login1.service'
Mar 11 12:54:31 filesrepo sshd[22021]: pam_systemd(sshd:session): Failed to create session: Connection timed out
Mar 11 12:54:31 filesrepo dbus[421]: [system] Failed to activate service 'org.freedesktop.login1': timed out
Mar 11 12:54:31 filesrepo dbus[421]: [system] Failed to activate service 'org.freedesktop.systemd1': timed out
Mar 11 12:54:32 filesrepo svnserve[22061]: DIGEST-MD5 common mech free
Mar 11 12:54:32 filesrepo sshd[22021]: pam_unix(sshd:session): session closed for user SOMEUSER

I have been noticing this for last few days but I thought systemd update should solve this (bug report was raised against systemd)

I updated system today (I have not given it a reboot yet) and I still see those logs.

Rebooting fixed this issue.

But I’m not sure about the cause.

–jeroen

via: [closed] pam_unix(sshd:session) timeouts / Networking, Server, and Protection / Arch Linux Forums.

Posted in *nix, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »

Moving my BitBucket mercurial repository to git was a lot harder than I hoped for (but moving to GitHub was easy)

Posted by jpluimers on 2015/06/10

After reading Converting Hg repositories to Git directed me into reading Bitbucket: Converting Hg repositories to Git I hoped moving my Mercurial repository on BitBucket to a Git repository would be something like following the steps.

It wasn’t.

First of all, hg-git on a Windows system requires Python or TortoiseHg. Neither of these I wanted to install for a one-off conversion.

So I took a throw-away Linux VM, and did the steps below. But let me first explain why.

Motivation

My motivation for moving away from BitBucket to GitHub, especially for projects containing markdown documentation.

When writing documentation in Markdown, being able to in-line reference pictures or have relative-references to other documents. This works perfectly in local Markdown tools (like MarkdownPad 2 or LightPaper).

Read the rest of this entry »

Posted in *nix, *nix-tools, BitBucket, Development, DVCS - Distributed Version Control, git, GitHub, Linux, Mercurial/Hg, openSuSE, Power User, Source Code Management, SuSE Linux | Leave a Comment »

revue: getting Tumbleweed on it.

Posted by jpluimers on 2015/06/09

Now that github stopped showing my README.rst as reStructuredText here is the htmlpreview link of the pandoc rendered reStructuredText:

revue: getting Tumbleweed on it.

It is about installing and configuring Tumbleweed which is a tad bit more frustrating than I hoped for.

In practice unixoids aren’t as heavenly as many geeks pretend them to be.

I got the htmlpreview solution via css – How to see an html page on github as a normal rendered html page to see preview in browser, without downloading? – Stack Overflow.

I might try the github pages in the future.

Sourcecode of htmlpreview is at htmlpreview/htmlpreview.github.com.

–jeroen

via:

Posted in *nix, Development, DVCS - Distributed Version Control, git, GitHub, Linux, openSuSE, Power User, Software Development, Source Code Management, SuSE Linux | Leave a Comment »

HCL:Raspberry Pi – openSUSE

Posted by jpluimers on 2015/05/25

Interesting: HCL:Raspberry Pi – openSUSE.

Posted in *nix, *nix-tools, Hardware Development, Linux, openSuSE, Power User, Raspberry Pi, SuSE Linux | Leave a Comment »

Time to upgrade some of my older OpenSuSE VMs from 12.3 to a more recent version

Posted by jpluimers on 2015/02/10

Last week, the final update for OpenSuSE 12.3 says it is time to upgrade:

│Patch: openSUSE-2015-100 Kind: recommended Version: 1
│
│This announcement marks the end of the maintenance period for openSUSE 12.3.
│
│In order to keep your systems up to date and secure, please migrate your
│systems to the current openSUSE version.
│
│For more information on how to upgrade to the current openSUSE version, please read:
│
│http://en.opensuse.org/SDB:Distribution-Upgrade
│
│Please make sure that you applied all maintenance updates provided for openSUSE 12.3 before starting the update.
│
│Thank you for using openSUSE,
│your Maintenance and Security Team

–jeroen

Posted in *nix, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »

*nix: Cron shortcuts @daily, @weekly, @monthly, … (via: Cron and Crontab usage and examples)

Posted by jpluimers on 2015/01/16

Even if you think you are familiar with something, it pays to keep your knowledge current.

I’ve been always struggling with the crontab syntax. It’s flexible, but for most cases overly complex, for instance I still thought I needed “0 0 * * 0” to run something weekly, which I needed.

So I am pretty sure there were no @monthly or @weekly in crontab last century.

Not so any more, and if I’d had the crontab documentation more often, I had known about the crontab shortcuts @reboot, @yearly, @annually, @monthly, @weekly, @daily, @midnight and @hourly many years ago: Read the rest of this entry »

Posted in *nix, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »

OpenSUSE: Getting to work the ruby script to login into dyndns.com automatically every week.

Posted by jpluimers on 2015/01/06

So I remember for the next time:

zypper install ruby
zypper install ruby-devel
zypper install gcc
zypper install gcc-c++

If you don’t install all these, them the gem will fail with errors like this: Read the rest of this entry »

Posted in *nix, Linux, openSuSE, Power User, SuSE Linux | 1 Comment »

My ZFS question on G+: investigation for using a XW6600 based system with ZFS.

Posted by jpluimers on 2014/12/20

My ZFS question on G+:

Hi everyone. I’m a geek. Learned most of the stuff by doing, and keeping tracks of what I did on my tech-blog http://wiert.me

I want to start with ZFS on a pair of HP XW6600 machines having 32gigabyte of RAM.
Any help on that is much appreciated.

The idea is to have one of these here in a closet and the other remotely, and perform replication between them (I’ve a 50megabit fiber-to-the-home uplink which can grow to 100megabit plus, internally my network is gigabit).

My current data is on a Windows 2003 x64 server with dual RAID5 configurations that are synced every night (not optimal for various reasons) with about 12gigabyte of files having mostly read-only access patterns and these kinds of sizes:
– small files between 4kilobyte and a few megabytes
– photos between 5 and 20 megabytes
– ISO backups and 7zip archives of projects (operating system installers, etc) between 100megabytes-6gigabytes
plus an ESXi machine having about 4gigabyte of data (mostly sizes between 20 and 200 gigabyte).

New storage should initially be at least 16gigabyte with room for growth.

I’m having active experience with OpenSuSE, ESXi and Windows. Solaris experience is from a long time ago. Learning by doing is my way of quickly gaining knowledge.

My schedule is doing research until the end of January (partially overlapping with a holiday) then building and testing until the end of Q1, going live early Q2.

Current plan is to put a lot of Samsung M9T 2terabyte SATA drives (they are only 9.5millimeter high) into the XW6600 rigs.
Earlier this year I did some research on controllers and hard drives, and I wonder how much of it is still current: https://wiert.me/2014/03/12/lots-of-2-5-3-5-and-5-25-conversion-brackets-and-hot-swap-bays/
(A quick calculation shows I should be able to get at least 14 externally accessible M9T drives into this machine, plus room for internal SSDs, etc).

So: where should I get started?

Initial questions I have:
– how about rebuild time when drives are lost? (how does the process of cold/hot spares work, can this be automated, how fast is it?)
– I’m not happy about the RAID5 rebuild times, so are 2TB drives indeed the sizes to go for?
– how about configuring things like ZFS equivalents of stripe size, buffer sizes, etc?
– what SATA controllers to use (is mainboard OK, what in addition to the mainboard SATA?)
– how can ZFS be used as an iSCSI target? how well does that work? (That would be really nice to connect to it from ESXi, Windows and many Linuxes/Linii)
– what about compression and block-deduplication?
– what about ZIP and L2ARC? how to estimate their size?
– which ZFS implementation to use? ZoL? OpenSolaris? Nexenta? Others?
– can a ZFS volume grow by adding extra drives?
(14 drives would get ~20terrabyte based on Z-3: http://www.servethehome.com/raid-calculator/ or http://wintelguy.com/raidcalc.pl but I want to have room for growth)

Lots of 2.5, 3.5 and 5.25 conversion brackets, cages and hot-swap bays

–jeroen

via: Hi everyone. I’m a geek. Learned most of the stuff by doing, and keeping tracks….

Posted in *nix, Hardware, HP XW6600, Linux, openSuSE, Power User, SuSE Linux, ZFS | 2 Comments »

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