NMAP is an open source network scanning utility. It has tons of options and is a very powerful tool that every administrator needs to know about. Recently, we were checking if UDP port 88 was open on a certain server. NMAP to the resuce :)..
nmap -sU -p 88 DESTINATION_SERVER_IP did the trick. The “-sU” option forces nmap to only scan UDP ports and “-p” forces nmap to only scan the specified port.
I loaned “Spirited Away” to one of my colleagues at work and she watched it with her children. The kids loved the movie and wanted to draw a thank you note for me.. My colleague asked them to draw the note and stick it to a cucumber from their kitchen garden so that she can give it to me as a gift. So she wakes up in the morning and here is what the kids come up
They really stuck the note to the cucumber :). Here it is after the tape was cleared up
Thx for the cute note guys 🙂
On of my friend sent me an e-mail with the top 10 pickup lines.. I thought they were hilarious and wanted to publish them here
Was your father a thief? Because he stole the stars from the sky and put them in your eyes.
Didn’t it hurt when you fell from heaven?
You must be tired, because you’ve been running through my mind all day.
Excuse me, I seem to have lost my phone number. Could I borrow yours?
Do you believe in love at first sight, or shall I walk by again?
Excuse me, do you kiss strangers? No? Well let me introduce myself.
Do your legs hurt from running through my dreams all night?
I’m new in town. Could you give me directions to your apartment?
Do you have a map? I keep getting lost in your eyes.
The only thing your eyes haven’t told me is your name.
Challenge: You are asked to update ~500 records on your DNS servers running Windows 2003 SP1.
Solution : Spend hours and hours updating the entries using the pretty MMC based GUI
or
use some creative scripting to do the work for you. Here is the recipe
1) Download the Windows Support Tools for SP1 from here. The support tools contain a useful utility called “dnscmd”. The tool allows one to add/update/delete entries for Windows DNS servers through a command line interface. DnsCmd /help returns the following
| Usage: DnsCmd []: IP address or host name — remote or local DNS server . — DNS server on local machine : /Info — Get server information /Config — Reset server or zone configuration /EnumZones — Enumerate zones /Statistics — Query/clear server statistics data /ClearCache — Clear DNS server cache /WriteBackFiles — Write back all zone or root-hint datafile(s) /StartScavenging — Initiates server scavenging /ResetListenAddresses — Set server IP address(es) to serve DNS requests /ResetForwarders — Set DNS servers to forward recursive queries to /ZoneInfo — View zone information /ZoneAdd — Create a new zone on the DNS server /ZoneDelete — Delete a zone from DNS server or DS /ZonePause — Pause a zone /ZoneResume — Resume a zone /ZoneReload — Reload zone from its database (file or DS) /ZoneWriteBack — Write back zone to file /ZoneRefresh — Force refresh of secondary zone from master /ZoneUpdateFromDs — Update a DS integrated zone by data from DS /ZonePrint — Display all records in the zone /ZoneResetType — Change zone type /ZoneResetSecondaries — Reset secondary\notify information for a zone /ZoneResetScavengeServers — Reset scavenging servers for a zone /ZoneResetMasters — Reset secondary zone’s master servers /ZoneExport — Export a zone to file /ZoneChangeDirectoryPartition — Move a zone to another directory partition /EnumRecords — Enumerate records at a name /RecordAdd — Create a record in zone or RootHints /RecordDelete — Delete a record from zone, RootHints or cache /NodeDelete — Delete all records at a name /AgeAllRecords — Force aging on node(s) in zone /EnumDirectoryPartitions — Enumerate directory partitions /DirectoryPartitionInfo — Get info on a directory partition /CreateDirectoryPartition — Create a directory partition /DeleteDirectoryPartition — Delete a directory partition /EnlistDirectoryPartition — Add DNS server to partition replication scope /UnenlistDirectoryPartition — Remove DNS server from replication scope /CreateBuiltinDirectoryPartitions — Create built-in partitions |
As you can see, there is ton of stuff you can do with this utility. I am mainly interested in the /RecordAdd function for this example.
2) Write a small perl script to massage your raw data into the form you want. In this case, I was given the hostname and the IP address in an excel spreadsheet. I exported the spreadsheet to a command delimited file and the following perl script finished the job for me
| #!/usr/bin/perl -w # use strict;my (@File, @Column, @HostID, @NetworkID, $Line); my $infile = ‘NetworkCore.csv’; my $outfile = ‘NetworkCore_Processed.txt’; open(READ,”$infile”) open(OUTPUT,”>$outfile”) foreach $Line(@File) |
Note : The DNS_SERVER, DOMAIN_TO_ADD and xxx.xxx.in-addr.arpa need to be replaced with your own values
3) Open a command prompt on the DNS server and copy and paste the contents of the file that the perl file spits out.. Did, I say that I love technology?? :)..
I have been maintaining my @kudithipudi.org address for some time now. I had all my E-mail from 1998 saved on my laptop until I had a hard drive disaster (ALWAYS BACKUP YOUR DATA), and lost all that E-mail. Ever since then, I have been trying to come up with a method to make my E-mail “crash” proof. I could have moved to using any of the popular free mail platforms (hotmail, yahoo, gmail etc.), but I didn’t want to loose the ability to send E-mail from my personal @kudithipudi.org address.
Google to the rescue – I was checking the settings on gmail the other day and noticed that I could setup a different E-mail address (which has to be verified) as my default “from address”. So I started forwarding E-mail from my domain to gmail. The problem now was to upload all the E-mail I have in Thunderbird up to gmail. That way, I would have all my E-mail in one single place and allow me to search through it. Google to the rescue again :), a query for “upload mail from thunderbird to gmail” returned this cool utility by Mark Lyon. It allows you to specify the source of your email and uploads the mail to your gmail account.
The next challenge was to find the directory/file where Thunderbird stores all the email. Google to the rescue again. You can get the location of the mail files from the account settings screen –> Local Folders in Thunderbird.
I am in E-mail bliss now. Use Gmail for all my messaging purposes. Next task would be to start using the Google Calendar.
Ran into an issue at work, where we had to reprocess all e-mails for a particular user on a Linux server. The email was stored in the standard mailbox format in /var/mail and all the e-mail was supposed to be sent to a different e-mail address. Here’s how we solved the issue
1) Use formail to split the mailbox into seperate messages and pipe it to sendmail. Command used was
formail -Y -n -s� sendmail -odq NAME_OF_USER < /var/mail/NAME_OF_USER
2) Force sendmail to process the queue and send the e-mail to the new address. Command used was
sendmail -v -qRNEW_EMAIL_ADDRESS
You can also edit the .forward file in the users home directory to forward e-mail to the new address and then you don’t have to specify the new e-mail address in the second command.
Link listing keyboard shortcuts (yes, they are still faster and more efficient 🙂 ) for Mozilla Firefox
http://www.mozilla.org/support/firefox/keyboard
Just discovered that “ctrl + w” closes a tab window :).
Ever wanted a cool designer t-shirt, but didn’t want to shell out mucho dinerio ($$$$) for it.. check out Threadless at http://www.threadless.com/.
It is a Chicago based company, that seems to act as a collection spot for artists. I like the web site layout and the features. They also seem to be using flickr to store all their customers “in-action” shots. Very novel and clever way to use the web to your advantage :)..
I finally got off my lazy ^%$$ and cleaned up my baby. Here is the
and it’s
Some quick facts about this beast
Engine:
* Type: 1795cc liquid-cooled 52-degree V-twin
* Displacement: 1795cc
* Bore and Stroke: 101.0mm x 112.0mm
* Fuel System: Programmed Fuel Injection (PGM-FI) with automatic choke
* Compression Ratio: 9.0:1
* MPG: NA
Drivetrain:
* Transmission: Five-speed
* Final Drive: Shaft
Brakes:
* Front: Dual 296mm discs with LBS three-piston calipers
* Rear: Single 316mm disc with LBS twin-piston caliper
Suspension:
* Front: 45mm inverted fork; 5.1-inch axle travel
* Rear: Dual shocks with five-position spring-preload adjustability; 3.9-inch travel
Wheels and Tires:
* Front: 130/70R-18 radial tire
* Rear: 180/70R-16 radial tire
Dimensions:
* Length: NA
* Seat Height: 27.3 in.
* Rake and Trail: 32.48 degrees / 5.7 inches
* Wheelbase: 67.6 in.
* Weight: 714 lbs. dry
* Fuel Capacity: 4.8 gals.
Just for comparision, this guy’s engine is more powerful than a Toyota Carolla (by 1 cc 🙂 ). Thats a lot of power sitting between your legs :). All I can say is that this guy is not for the faint hearted.
I have been in the Chicago area for ~6 years now and have never seen a hailstrom. Last week, on Thursday (5/17), I came home early and was caught up in a hailstrom. I was able to grab my camera and capture some quick shots of the strom from my backyard
