For my documentation. Here is the command line parameters, I used to convert a video file in mpg format to flv (flash video) format using ffmped (open source format converter)
ffmpeg -i Original_Video.mpg -deinterlace -ar 44100 -r 25 -qmin 3 -qmax 6 Converted_Video.flvI will post details on where to get software and such, when I have time :).
Adding the following options to the [Global] section in the samba (open source software providing windows compatible file sharing for *nix operating systems) will most likely speed your throughput
socket options = TCP_NODELAY IPTOS_LOWDELAY SO_SNDBUF=8192 SO_RCVBUF=8192The receive and send buffer seem to do the trick.
For my record…here’s a snippet of perl code that can be called as a sub function to unmount a partition in Linux. Â The magic is in the line “grep m{$mountPoint}, qx{/bin/mount}”, which essentially lets you check if the partition is already mounted or not.
sub UnMountVolume($)
{
my $mountPoint = $_[0];
print "Unmounting $mountPoint\n";
# Check if the mount point exists
if ( grep m{$mountPoint}, qx{/bin/mount} )
{
#Let's try to unmount it
system("/bin/umount $mountPoint");
}
else
{
print "$mountPoint is not mounted, so didn't have to do anything\n";
}
}
As with any perl code, I am sure there are a tons of ways to do this in a more efficient and “cool” way.
I ran across a cached Google entry for a good collection of awk one liners by Eric Pemant. Since I thought the original site was down, I decided to host it on my domain at https://kudithipudi.org/misc/awk_one_liners.txt. But I did some digging and looks like Eric has his own site now and hosts a lot more resources related to awk at http://www.pement.org/awk.htm. Thx for the great collection Eric..
There are a ton of scripts to find how many IP addresses  are configured on a system, but I could not find one, whic would show me which particular network interface an IP address was configured on. Here is a one liner, that will give you this information in Linux
/sbin/ifconfig | grep -B1 10.10.10.10 | awk '{if (NR==1) print $1}'
The same script can be changes a bit to support other operating systems too. Essentially, I am doing a grep (search) of the output of ifconfig, which shows all the network information on the system for a particular IP. At the same time, I am using the -B1 option, which will show the line above the matching line. Finally, I am piping this to awk and printing the first row in the first column.
Looks like Travelocity was down early today due to a power outage. Here is a screenshot of the site, right after they came up
According to Pingdom, the site was down for ~1 hour and 29 minutes. If they did come up at an alternate site, I personally think that is a pretty good response time. Running a high transaction web site (and one that is as complicated as Travelocity) is no easy feat and when you throw DR into the mix, it gets pretty nasty. The site is primarily hosted out of the EDS/Sabre/Travelocity datacenter in Tulsa, Okhlahoma.
If you are an Internet junkie like me, here is a list of the 2009 Webware winners.
 http://www.cnet.com/html/ww/100/2009/winners.html?tag=newsLeadStoriesArea.1 .
You will recognize a lot of the names and might also discover some new cool sites.
Say you need to sudo as a particular user and run a command and at the same time you need to pass an environmental variable to the command, you can do it by passing the command in doublequotes.
For example, I want to start Oracle while I am logged in as another user (vinay), I can start the database using dbstart by issues
"sudo su - oracle -c "dbstart /$ORACLE_HOME"
$ORACLE_HOME is an environmental variable listed under user oracle’s environment.
Needless to say, you need to ensure that you have sudo configured to allow your userID to su to oracle.
If you want to redirect the default home page on Jboss (which has links to the Jboss site and also the JMX Console), you can do it by editing the index.html file in
$JBOSS_HOME/server/$INSTANCE/deploy/jboss-web.deployer/ROOT.war.
The $INSTANCE is the mode you are running Jboss in (default, all, messaging etc).
For my reference.. good article about command line usage of grep . http://arstechnica.com/open-source/news/2009/05/command-line-made-easy-five-simple-recipes-for-grep.ars . Older how to articles on my site related to this topic are here and here.