How To Play .ram(Real Audio Metadata) In Redhat/Ubunto

The .ram (Real Audio Metadata) is an properitery audo formate from Real media network's which is having its player called Real player.
This format is a stream media format, ie media is stramed from other source.

So how to play this file in Linux?
Ans : To play this we have to install mplayer. you may get doubt that why I am saying mplayer, i dont suggest to you a properitery real plyaer which will be annoying you all sorts of ads etc. mplayer is a good open source software with which you can play almost every formate. This is my favorite player after VLC player, which is once again a open source.

These are the file formates supported by mplayer
1. Physical media : CDs, DVDs, Video CDs

2. Container formats : 3GP, AVI, ASF, FLV, Matroska, MOV (QuickTime), MP4,
NUT, Ogg, OGM, RealMedia

3. Video formats : Cinepak, DV, H.263, H.264/MPEG-4 AVC, HuffYUV, Indeo, MJPEG, MPEG-1, MPEG-2, MPEG-4 Part 2, RealVideo, Sorenson, Theora, WMV

4. Audio formats : AAC, AC3, ALAC, AMR, DTS, FLAC, Intel Music Coder, Monkey's Audio, MP3, Musepack, RealAudio, Shorten, Speex, Vorbis, WMA

5. Subtitle formats : AQTitle, ASS/SSA, CC, JACOsub, MicroDVD, MPsub, OGM, PJS, RT, Sami, SRT, SubViewer, VOBsub, VPlayer

6. Image formats: BMP, JPEG, MNG, PCX, PTX, TGA, TIFF, SGI, Sun Raster

7. Protocols : RTP, RTSP, HTTP, FTP, MMS, Netstream (mpst://), SMB –wikipedia.org

How to install mplayer in linux?
In Ubuntu Linux:
sudo apt-get install mplayer

In Redhat Linux:
yum install mplayer

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Batch Programming (Dos Scripting) VS Shell Scripting

When I started my career in IT field. I have landed into windows world, as i know that no companies give a chance to fresher to work on production Linux servers.. Its a good experience to work on DOS scripts(aka Batch programming). There are so many similarities/differences/advantages/disadvantages between Batch programming and Shell scripting. Lets see what they are.

Similarities

Sl.No	Batch programming	Shell script
1	Batch execution of commands in a batch file	Batch execution of command in shell scripts
2	Can read inputs from users	Can read inputs from users
3	Has control structures such as for, if, while, switch for better automating/scripting	Has control structures such as for, if, while, switch for better automating/scripting
4	Supports advanced features such as Functions and Arrays	Supports advanced features such as Functions and Arrays
5	Supports regular expressions(using findstr)	Supports regular expressions
6	Can include other programming codes such as perl(ie.. in middle of dos script we can include some other programming language code for effective scripting)	Can include other programming codes such as Perl, AWK, SED etc.

 

Differences

Sl.No	Batch programming	Shell script
1	Lack of richness of tools/commands	Have good number of tools(as of my knowledge there are more than 75000 commands)
2	Supports only one vender(ie windows)	Supports for number of venders such as Sun/apple/IBM AIX/HP-UX etc.
3	No other variants for DOS	In Shall there are no of variants such as bash, ksh, csh, zsh etc..
4	Low capabilities of integrating with other programming code in batch scripting	Good capabilities of integrating other programming code in shell script
5	Cannot handle complex regular expressions	Can handle complex regular expressions.
6	A batch file should always end with .bat	There is no such concept like file extension, but a shell script file permission should be set to executable.
7	To execute a batch program just enter the file name at CLI	To execute a shell script, here are the ways to execute it 1)chmod +x shellscript.sh;./shellscript.sh 2)sh shellscript.sh

Good article on how to convert your Batch program to a Shell script.
http://tldp.org/LDP/abs/html/dosbatch.html

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All About Firefox "About Protocol"

Today I found some interesting hack about Mozilla/Firefox. I am in need of java in my Ubuntu machine. I have installed java, but I am not able to see any java related sites in my browser So when I have started searching for related topics, I found my answer how to check java is configured in your browser or not. I came to know about Firefox hidden “about protocol”. Though my browser is showing java enabled, but I am not able to see java content of site. The solution for this is to check whether java is configured properly to your browser or not.

So how to check whether java is configured or not?
Ans : Just open new tab in firefox and type about:plugins. This should show all

the plug-in’s installed in your browser.

If you didn’t find java. Then follow the below link for how to install and test it for your machine.
http://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox

And When I tweaked some more I have realized we can do much with this Firefox about protocol.
Though below things are not that much useful, but its fun to see them
Type below about commands in your Firefox and see yourself what info you can find with Firefox. My favorite one is about:robots
about:
about:blank
about:buildconfig
about:cache
about:cache-entry
about:config
about:crashes
about:credits
about:license
about:mozilla
about:plugins
about:rights
about:rights#webservices
about:robots
about:support

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