Anand Rajasekar » Linux

Finding if Multicast is supported

anandsekar — Tue, 30 Oct 2007 04:09:48 +0000

One way to easily find if mulitcast is supported in a *nix system is to issue

netstat -gn

which returns the membership groups of the mulitcast addresses in the system

e.g. output
Group Memberships: IPv4
Interface Group RefCnt
——— ——————– ——
lo0 224.0.0.75 1
lo0 224.0.0.1 1
eri0 224.0.0.75 1
eri0 224.0.0.1 2

Joining all lines in a file using sed

anandsekar — Fri, 13 Oct 2006 06:19:19 +0000

Sed (Stream EDitor) is a very powerful stream editor to manipulate text files.
I needed an utility that would join all lines in a text file to a single line with “\n” as a separator so that I could easily cut and paste inline velocity templates into java code. Here is the final sed command !

sed -e :a -e ‘/$/N; s/\n/\\n/; ta’ [filename]

Explanation :

-e – denotes a command to be executed
:a – is a label
/$/N – defines the scope of the match for the current and the (N)ext line
s/\n/\\n/; – replaces all EOL with “\n”
ta; – goto label a if the match is sucessful

Installing Internet Explorer on Linux

anandsekar — Fri, 29 Sep 2006 17:52:19 +0000

The easiest way to install IE in linux is to use IEs4Linux. This is a script that would download all required installables from Microsoft and install IE on your linux system. You need have wine and cabextract preinstalled on the linux box.

Why the Linux file system does not need defragmenting …

anandsekar — Sat, 19 Aug 2006 17:58:37 +0000

I came across this excellant article explaining in simple ways why the linux file system does not need to be defragmented. Read On ..

Switching to Linux

anandsekar — Fri, 07 Apr 2006 07:41:40 +0000

I wanted to switch my home desktop to linux for a long time and I finally got rid of windows and installed Fedora Core 5. The installation was very smooth and extremely impressive. The only hardware that did not get detected was my USB wireless adaptor (airlink). Wireless drivers for unix can be found at