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

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Archive for the ‘*nix’ Category

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, 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 »

20 years ago today: Here’s a nickel kid. Go buy yourself a real computer.

Posted by jpluimers on 2015/06/24

An eternal Dilbert strip that is based on the tiny Here’s a nickel kid. Go buy yourself a real computer fragment from single.h:

#if _FP_W_TYPE_SIZE < 32
#error "Here's a nickel kid. Go buy yourself a real computer."
#endif

Read the rest of this entry »

Posted in *nix, ARM, Assembly Language, Delphi, Delphi 1, Development, Fun, Geeky, History, MS-DOS, Power User, Software Development, Windows, Windows 8.1, Windows 95, Windows NT, x86 | 2 Comments »

Research notes on Diffie Hellman over WebSockets over a MittM http proxy to setup an encapsulated secure channel

Posted by jpluimers on 2015/06/17

Inspired by CloudFlare Keyless SSL, I have this idea of using Diffie Hellman over WebSockets over a MittM based http proxy (which intercepts and decrypts HTTPS traffic) like mitmproxy (but them from a commercial vendor to inspect web traffic) to setup an encapsulated secure channel.

I know SSH uses Diffie Hellman to setup a secure channel over a binary TCP connection.

Binary communication over HTTP usually means WebSocket.

I don’t want WebSSH (which does use WebSockets, but is probably filtered by the MitM proxy anyway).

Maybe either of these open source tools will work:

If these don’t work, I need to do more research.

Since I use C# and .NET for much of my work, I started the WebSocket over HTTP C# query.

c# – How to use proxies with the WebSocket4Net library – Stack Overflow.

–jeroen

Posted in *nix, *nix-tools, Communications Development, Development, HTTP, Internet protocol suite, Linux, Power User, SSH, SuSE Linux, TCP, WebSockets, Windows, Windows-Http-Proxy | Leave a Comment »

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 »

 
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