cd /root
wget --passive-ftp ftp://ftp.pangeia.com.br/pub/seg/pac/chkrootkit.tar.gz
tar xvzf chkrootkit.tar.gz
cd chkrootkit-0.49/
make sense
./chkrootkit

Check the output, if you get output indicating “INFECTED” then you should re-install your server and do everything to avoid further infects.

In my case mdadm is used to configure the software RAID and mdadm –detail /dev/md1 can be used to show the rebuild status:

[root@hxxxxxxx ~]# mdadm --detail /dev/md1
/dev/md1:
Version : 00.90
Creation Time : Thu Nov  9 18:57:15 2006
Raid Level : raid1
Array Size : 159726144 (152.33 GiB 163.56 GB)
Used Dev Size : 159726144 (152.33 GiB 163.56 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 1
Persistence : Superblock is persistent
Update Time : Sun Feb 14 19:45:21 2010
State : active, resyncing
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Rebuild Status : 31% complete
UUID : be29700c:083d0c62:67a9c130:e044323b
Events : 0.3626065
Number   Major   Minor   RaidDevice State
0       8        3        0      active sync   /dev/sda3
1       8       19        1      active sync   /dev/sdb3

In my case 31% of the rebuilt process are finished. We still have to wait a little bit..

Links

• The Software-RAID HOWTO: Detecting, querying and testing
• The Software-RAID HOTWO

• Changing into a deeper directory structure will create an incredible long bash prompt

For me it was quite annoying to have the prompt sometimes wider than the terminal window. In Debian standard configuration this is the case. So I decided to shorten the prompt.

I kept my prompt very simple, the only thing you have to do is to add the following lines to your ~/.bashrc

export PS1="[\u@\h \W]\\$ "
export PS2="> "

Make sure to add it at the end of your .bashrc file in your home directory. Otherwise it may be overwritten by other prompt definitions in your .bashrc.

Before

harry@h1096660:/usr/local/include/ffmpeg$

After

[harry@h1096660 ffmpeg]$

Better

Further links and examples

• Bash Prompt HOWTO
• Bash Prompts

coLinux is the base – a port of the Linux kernel which allows you to run Linux cooperatively on your Windows PC. andLinux is a complete Ubuntu Linux system which uses coLinux, Xming as X server and PulseAudio as sound server.

I’ve tried andLinux on my Windows XP notebook, installation was easy. Quite nice if you also want to have Linux running on your PC without purchasing other products. You can start Linux applications and they appear like a regular Windows application on your desktop.

andLinux offers some more features:

• Access from Linux applications to Windows filesystem
• Quick start of Linux applications from Quicklaunch bar
• Easy start of applications from KDE Start menu

See also:

• German andLinux website: andlinux.de

Definitely a try worth!

dpkg-reconfigure tzdata

Now you will be prompted to choose your desired time zone.

How the time zone can be change manually can be found here:

• http://www.wikihow.com/Change-the-Timezone-in-Linux
• http://www.linuxsa.org.au/tips/time.html

Which information does it display?

• General: title, author, director, album, track number, date, duration…
• Video: codec, aspect, fps, bitrate…
• Audio: codec, sample rate, channels, language, bitrate…
• Text: language of subtitle
• Chapters: number of chapters, list of chapters

Which kind of formats (containers) does it support?

• Video: MKV, OGM, AVI, DivX, WMV, QuickTime, Real, MPEG-1, MPEG-2, MPEG-4, DVD (VOB)…
  (Codecs: DivX, XviD, MSMPEG4, ASP, H.264, AVC…)
• Audio: OGG, MP3, WAV, RA, AC3, DTS, AAC, M4A, AU, AIFF…
• Subtitles: SRT, SSA, ASS, SAMI…

For more details visit the MediaInfo homepage. Download is available for Windows, Mac and Linux operating systems.

The crazy thing: .WMV is not equal .WMV. The codec behind is really a different thing. In my opinion best solution would be that only MPEG2 and MPEG4/H.264 would be used. But as usual licensing and other policital issues make it more difficult. So we are faced to a very high number of video formats and codecs.

Quite annoying for the user who only wants to watch a movie which will often not work. My suggestion is to use the VLC media player. It’s free to use,  supports almost any video format and works on all well known operating systems.

Furthermore it supports many options for video streaming. Below is a screen shot of a NASA HD video which shows the Endeavor launch on mission STS-126. There you will find other HD videos.

See also:

• VLC media player download
• NASA HD video download

• Syntax highlighting
• Different color scheme
• Disable indenting when copy and pasting a text from clip board
• Replace tabs with blanks
• Use 2 spaces as tabs instead of 4 spaces
• Improve the search
• Display cursor position

Open the .vimrc in your home directory and add the following settings:

" enable syntax highlightning
syntax enable
" set a different color scheme
colorscheme desert
" avoid identing when pasting a text
set paste
" enable auto indent
set autoindent
" expand tabs to spaces
set expandtab
" set the tab stop to 2 spaces and soft tab stop to 2 spaces
set tabstop=2 sts=2
set shiftwidth=2
" immediately search and display the typed search pattern
set incsearch
" highlighting of search matches
set hlsearch
" show cursor position
set ruler

Much better now! Try the search (e.g. ESC /high) and you will recognize that the search pattern will be immediately highlighted when you enter it.

Note: If you want to replace all tabs within an existing file you can now use the vi command “:retab” and all tabs will be removed according the settings done in your .vimrc.

And finally the result:

No related posts.

apt-get install iperf

Optionally the source or the Windows binary is available from sourceforge.net/projects/iperf

Building and installing from source is done using a few commands:

tar xvfz iperf-2.0.4.tar.gz
cd iperf-2.0.4
./configure
make
make install

Once installed iperf the server is started on machine 1:

machine1:~# iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------

Next the client is started on machine 2:

machine2:~# iperf -c machine1.mydomain.de
------------------------------------------------------------
Client connecting to machine1.mydomain.de, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[  3] local xx.xx.xx.xx port 45325 connected with yy.yy.yy.yyport 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  96.6 MBytes  80.9 Mbits/sec

Tested on two servers connected with 100 MBit/s located at two different providers in Germany we get a result of 80.9 MBits/sec.

This result is slightly higher compared to the result from our measurement done with NETIO in the article Network Throughput Measurement. So we start the test again with addtional parameters:

machine2:~# iperf -c machine1.mydomain.de -w 512k -l 512k
------------------------------------------------------------
Client connecting to machine1.mydomain.de, TCP port 5001
TCP window size:   256 KByte (WARNING: requested   512 KByte)
------------------------------------------------------------
[  3] local xx.xx.xx.xx port 40987 connected with yy.yy.yy.yyport 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  72.0 MBytes  60.3 Mbits/sec

Now using modified read/write buffer size and TCP windows size we get almost the same result as in our test with netio.

Definitely a tool which can be recommended to check your network throughput!