I saw that there is a version of Leopard hanging around on the internet that can be used to run it on any Intel PC (well... an Intel PC with certain specifications!).

To find out if the the proof indeed lies in the pudding, I started to download it via a torrent. Now, downloading a torrent that is over 2 gigs is not a simple task -- as least not here down in New Zealand, where bandwidth can be be at best described as quite sad.

So my torrent download has now been going on for a day and a half, and I've been a good boy -- I've seeded more than downloaded :)

However, I wanted to find out all the open network sockets so that I could possibly open up my firewall or tweak it somehow to increase the speed of downloads. So I needed to find out the all the open network sockets to see the port number.

First I tried the usual netstat which gave me the following output:

Proto Recv-Q Send-Q  Local Address          Foreign Address        (state)

tcp4       0      0  192.168.0.102.55129    74-46-59-218.dr0.13704 ESTABLISHED

tcp4       0      0  192.168.0.102.55105    host66-227-dynam.53868 ESTABLISHED

tcp4       0      0  192.168.0.102.54980    82.152.9.81.21695      ESTABLISHED

tcp4       0      0  192.168.0.102.54723    73.167.217.87.dy.4630  ESTABLISHED

tcp4       0      0  192.168.0.102.54418    163-158.static.q.http  CLOSE_WAIT

tcp4       0  34789  192.168.0.102.54397    71-80-169-111.dh.16262 ESTABLISHED

tcp4       0      0  192.168.0.102.54387    213.22.163.110.6887    ESTABLISHED

tcp4       0      0  192.168.0.102.54380    80.254.74.63.29113     ESTABLISHED

tcp4       0      0  192.168.0.102.53414    20129006121.user.6881  ESTABLISHED

tcp4       0      0  192.168.0.102.53183    adsl-76-248-156-.51413 ESTABLISHED

tcp4       0      0  192.168.0.102.52146    cpe-24-162-115-1.53692 ESTABLISHED



... blah ...

However the netstat out put does not show the process id and the name of actual name of the process.

Then I found (thanks to the Man pages and Google), that there is a better way to do this -- lsof -i. This gives you an output like:

i-n-d-i-v-e-r:~ indy$ sudo lsof -i

COMMAND    PID           USER   FD   TYPE    DEVICE SIZE/OFF   NODE NAME

launchd      1           root   13u  IPv6 0x3c2bbe8      0t0    TCP localhost:631 (LISTEN)

launchd      1           root   14u  IPv4 0x3f21e64      0t0    TCP localhost:631 (LISTEN)

mDNSRespo   21 _mdnsresponder    7u  IPv4 0x3c28b18      0t0    UDP *:5353

mDNSRespo   21 _mdnsresponder    8u  IPv6 0x3c28a40      0t0    UDP *:5353

configd     27           root    8u  IPv4 0x3c28cc8      0t0    UDP *:*

configd     27           root   12u  IPv6 0x45b8da0      0t0 ICMPV6 *:*

mysqld     103         _mysql   10u  IPv4 0x3f21a68      0t0    TCP *:3306 (LISTEN)

ntpd      3903           root   20u  IPv4 0x3c282a8      0t0    UDP *:123

ntpd      3903           root   21u  IPv6 0x3c28608      0t0    UDP *:123

ntpd      3903           root   22u  IPv6 0x3c28da0      0t0    UDP localhost:123

ntpd      3903           root   23u  IPv4 0x3c28968      0t0    UDP localhost:123

ntpd      3903           root   24u  IPv6 0x3c28890      0t0    UDP localhost:123

ntpd      3903           root   25u  IPv4 0x3c26a30      0t0    UDP 192.168.0.102:123

ntpd      3903           root   27u  IPv6 0x3c27b10      0t0    UDP i-n-d-i-v-e-r.local:123

SystemUIS 4038           indy    9u  IPv4 0x3c287b8      0t0    UDP *:*

GrowlHelp 4047           indy    3u  IPv4 0x4ea3a68      0t0    TCP 192.168.0.102:63110->216.64.142.80:80 (CLOSE_WAIT)

Skype     4048           indy    6u  IPv4 0x3c26370      0t0    UDP localhost:55598

Skype     4048           indy   32u  IPv4 0x3db9e64      0t0    TCP 192.168.0.102:51804->c211-30-0-59.wavrl1.nsw.optusnet.com.au:443 (ESTABLISHED)

i-n-d-i-v-e-r:~ indy$ sudo lsof -i -P

COMMAND    PID           USER   FD   TYPE    DEVICE SIZE/OFF   NODE NAME

launchd      1           root   13u  IPv6 0x3c2bbe8      0t0    TCP localhost:631 (LISTEN)

launchd      1           root   14u  IPv4 0x3f21e64      0t0    TCP localhost:631 (LISTEN)

mDNSRespo   21 _mdnsresponder    7u  IPv4 0x3c28b18      0t0    UDP *:5353

mDNSRespo   21 _mdnsresponder    8u  IPv6 0x3c28a40      0t0    UDP *:5353

configd     27           root    8u  IPv4 0x3c28cc8      0t0    UDP *:*

configd     27           root   12u  IPv6 0x45b8da0      0t0 ICMPV6 *:*

mysqld     103         _mysql   10u  IPv4 0x3f21a68      0t0    TCP *:3306 (LISTEN)

ntpd      3903           root   20u  IPv4 0x3c282a8      0t0    UDP *:123

ntpd      3903           root   21u  IPv6 0x3c28608      0t0    UDP *:123

ntpd      3903           root   22u  IPv6 0x3c28da0      0t0    UDP localhost:123

ntpd      3903           root   23u  IPv4 0x3c28968      0t0    UDP localhost:123

ntpd      3903           root   24u  IPv6 0x3c28890      0t0    UDP localhost:123

ntpd      3903           root   25u  IPv4 0x3c26a30      0t0    UDP 192.168.0.102:123

ntpd      3903           root   27u  IPv6 0x3c27b10      0t0    UDP i-n-d-i-v-e-r.local:123

SystemUIS 4038           indy    9u  IPv4 0x3c287b8      0t0    UDP *:*

GrowlHelp 4047           indy    3u  IPv4 0x4ea3a68      0t0    TCP 192.168.0.102:63110->216.64.142.80:80 (CLOSE_WAIT)

Skype     4048           indy    6u  IPv4 0x3c26370      0t0    UDP localhost:55598

Skype     4048           indy   32u  IPv4 0x3db9e64      0t0    TCP 192.168.0.102:51804->c211-30-0-59.wavrl1.nsw.optusnet.com.au:443 (ESTABLISHED)

Skype     4048           indy   33u  IPv4 0x4281270      0t0    TCP 192.168.0.102:54418->163-158.static.quiettouch.com:80 (CLOSE_WAIT)

Skype     4048           indy   35u  IPv4 0x5f0166c      0t0    TCP *:24242 (LISTEN)

Skype     4048           indy   36u  IPv4 0x3c28530      0t0    UDP *:24242

Skype     4048           indy   37u  IPv4 0x44bb270      0t0    TCP 192.168.5.51:64396->ppp-58-8-80-254.revip2.asianet.co.th:443 (ESTABLISHED)

Python    4446           indy   33u  IPv4 0x3e32270      0t0    TCP *:6881 (LISTEN)

Python    4446           indy   34u  IPv4 0x3c25f38      0t0    UDP *:6881

Python    4446           indy   37u  IPv4 0x569c270      0t0    TCP 192.168.0.102:51831->dial8-20.infoave.net:11289 (ESTABLISHED)

Python    4446           indy   41u  IPv4 0x3db966c      0t0    TCP 192.168.0.102:53414->20129006121.user.veloxzone.com.br:6881 (ESTABLISHED)

Python    4446           indy   44u  IPv4 0x42dde64      0t0    TCP 192.168.0.102:55149->IGLD-83-130-215-156.inter.net.il:42017 (ESTABLISHED)

Python    4446           indy   45u  IPv4 0x5f01a68      0t0    TCP 192.168.0.102:54380->80-254-74-63.static.monzoon.net:29113 (ESTABLISHED)



... more here ...
Using the lsof command (for listing open files), one can find out all the open files that are connecting to the network.
Run it as sudo to give a list of all open files. If you don't, then you get a list of only those files that are open for the current users.
Coming back to the original reason why I wanted to check the open connections, I could see all the ports that were being used by the torrent client. (I don't think I'll do anything to my firewall to "optimize" the connectivity. I'll just live with the slow download speed!)
 
 
						  

A few days back I was looking for a way to change the CurrentJDK symbolic link on my Mac. I had found this nice script somewhere (don't quite remember where). But is is very useful.

#!/bin/sh



cd /System/Library/Frameworks/JavaVM.framework/Versions



CURJDK="`readlink CurrentJDK`"

echo Current JDK version: $CURJDK



if [ "$1" == "" ]; then

echo Installed versions:

ls

exit

fi



VERFOUND=`ls | grep $1 | head -n 1`



if [ "$VERFOUND" != "$1" ]; then

BASE="`basename $0`"

echo Error: Could not change JDK-- version $1 not installed!

echo Run $BASE without arguments to see a list of installed versions.

exit 127

fi



echo You must now enter your Mac OS X password to change the JDK.

sudo ln -fhsv $1 CurrentJDK

Save it as a file name of your choice. I saved it as "SetJDK.sh". Give it execute permissions, and run the script.

This is another one of those blog entries where I want to blog for the sake of remembering tedious details...

The issue that I was facing was how to add a directory to the PATH environment variable on my Mac.

I wanted to add a path to MySQL install. So I'll use that example. The following command in a Terminal window created my .bash_profile file. If the file already exists, it would have added to that file.

The PATH information is stored in /Users/username/.bash_profile file.

Just so that I don't forget...

While installing JBoss, I found that I need to setup my JAVA_HOME variable correctly.

After checking a couple of sites, I found the following to be a good way to figure out and setup JAVA_HOME variable on Mac OSX.

In a Terminal window, type

which java

This pointed to "/usr/bin/java", which was a symbolic link to "/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Commands/java". This in turn was a symbolic link to "/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2".

So my JAVA_HOME was pointing to "/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2/Home".

In order to change the JAVA_HOME variable I found a very nice utility called "RCEnvironment" that let me setup all kind of environment variables, including JAVA_HOME, very nicely and easily.

Once I added a JAVA_HOME variable (and pointed it to Java 5 home using RCEnviornment, I logged out and back in again. My JAVA_HOME was setup as I wanted.

Today I had an interesting conversation with colleagues and friends about Vista and who all amongst us wanted to upgrade our home computers to Vista.

All of them said they were going to hold off upgrading their home machines. There seemed to be a few valid reasons:

» Continue reading "Hello Ubuntu! I'm going easy on Vista"