Archive for the ‘Trouble-Shooting’ Category

RedHat Linux network redundancy using interface bonding

11 May 2014 1 comment

This notes written down when facing requirement to make barco wall-display working with redundant network link. Eventhough setup barco controller is not part of my responsibility, I still want to help our customer to fulfill their needs – for the sake of knowledge sharing.


This configuration tested using hardware and software specification

  1. Linux distribution RH7.2 (Enigma) i386
  2. network interfaces (identified as eth0 & eth1)

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Portsnap error when fetching metadata

25 April 2012 5 comments


root@documentation:/home/lqman# portsnap fetch
Looking up mirrors... 4 mirrors found.
Fetching snapshot tag from done.
Fetching snapshot metadata... done.
Updating from Tue Apr 10 14:26:36 WIT 2012 to Thu Apr 19 13:29:51 WIT 2012.
Fetching 4 metadata patches. done.
Applying metadata patches... done.
Fetching 4 metadata files... /usr/sbin/portsnap: cannot open 67a31f4d7c38f9a89afb15b40a7bd893cbfdffb4f14703f84d8b6f747084f87e.gz: No such file or directory
metadata is corrupt

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Sending data to serial port simultaneusly using jpnevulator

31 March 2012 7 comments

This solution comes when we facing trouble on solaris10 at remote site, whenever the machine read data from GPS using usb2serial cable, core-dump is always happen.

Before we go to the site (medan) we must simulate & solve problem at our office.

Laptop CQ-42 Read more…

Proxy Authentication with NTLM scheme

4 November 2011 Leave a comment

Ini adalah kenang-kenangan dari pulau Batam.

Secara default OS unix/linux tidak support utk mengikuti schema domain authencation yg dimiliki windows, yaitu NTLM dengan format nama_domain\nama_user.
Setelah seharian melakukan analisa terhadap kesalahan yg terjadi, ternyata om google memberikan pencerahan, Read more…

how to use socks proxy from wget

29 May 2011 4 comments

Warning : This post is my own note, you may believe on it or not. 😛

Before continue read this post, I recommend you to read this post as preface.

Linux / BSD user usually familiar with shell, and wget is very usefull tool for download from shell. Read more…

Restore FreeBSD bootloader after installing windows

18 May 2011 Leave a comment

When you install wind**s after freeBSD (or another *nix family, eg : linux, MAC) it always automatically replace/override the MBR and bootloader with its own (windows only).
Then you can’t boot all OS except windows (this selfish feature especially annoying me).
Then you need to restore your MBR and bootloader using FreeBSD’s, this is the step : Read more…

boot FreeBSD directly from grub2

6 April 2011 2 comments

Spesifikasi system yang digunakan:

  • debian GNU/Linux, kernel 2.6.32-55, grub2 1.98+20100804-14
  • FreeBSD 8.2, kernel GENERIC

Sesuai dg rekomendasi dari freebsd forum, cara untuk mem-boot BSD dari linux ada 2 metode, yaitu :

  • Chainload ke partisi FreeBSD yg dituju, lalu booting dg bootloader FreeBSD yg ada pada partisi tsb.
  • Masukkan semua parameter booting dari GRUB dan booting secara langsung dari grub.

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