Windows update .NET 4 error 66a
I stumbled across this error today while doing windows updates on several new windows 7 laptops. The error was ”Error 66a” and it prevented me from installing the .NET 4 security patch.
The fix for this little bugger is below.
Click on Start and click on Control panel.
B. Go to Program and Features.
C. Scroll down to Microsoft.Net Framework 4 Client Profile, right click it.
D. It will give you a choice of Uninstall/Change, click it.
E. Then, it will give a choice to Repair it, pick Repair it. It will take about 4-10 minutes to repair (with my PC) your experience may vary.
F. When completed, go to your update center, and update it again
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Renew Self-Signed SSL Certificate Microsoft Exchange Server 2007
I havn’t worked with Microsoft Exchange Server 2007 much, but today I got thrown into the lions den when a client asked if I could update the SSL certificate because they were getting an error that the certificate was outdated. I searched and searched, but simply could not find the answer I wanted. After an hour, I FINALLY found the solution on microsoft’s technet, the magic line is below.
1) Open up the Exchange Management Shell
2) Type the following -replacing the information for your server below
New-ExchangeCertificate -DomainName “exchange1.domain.com”, “exchange1″ -Services “SMTP”
The console will ask you if you want to replace the existing certificate. Type “Y” and then ENTER.
DONE!
What a relief! I was finally able to continue the mass of other support calls coming in today.
Sources:
http://technet.microsoft.com/en-us/library/bb851505(EXCHG.80).aspx
Ultimate Carputer – The NEXUS Project
I inted to convert my 2003 Chevrolet Silverado into a wandering mass of technology. Follow me as i design and build this hefty project. Below are the features that i intend to include. Though there could be much more capability i will work to obtain the below first.
Hardware:
- EEE PC netbook with SSD and Ubuntu OS
- USB ODB II Interface ($29)
- Relay control system for remote starting ( option 1 Spinneret Webserver, option 2 USB Relay ) (~$50)
- Secondary 12V power system ( If i decide all this technology will leave me stranded in the middle of nowhere with a dead battery)
- USB GPS Reciever ($20)
- Verizon Aircard (tethering with Droidx may eliminate this. -im cheap.)
- Ubnt bullet 2.4 ghz
- External 1 TB HD
- Multiband antenna for gps, wifi and cell booster
- Willson Cellphone Booster
- Logitech HiDef usb camera(s ?)
- Touch LCD Display or Android powered Tablet
Designated Functions
- Remote file sync
- GPS navigation
- Remote Start (keyless unit / web) (Relay system / OBDII Interface)
- Remote Diagnosing (web based) (ODB II USB Interface
- Mobile Hotspot (UBNT pico station HP)
- Wifi leeching (using open wifi)
- Entertainment System (music, videos, games)
- Interface for Android OS
- VOIP (with cab microphone) Skype / Ventrilo (microphone pre-installed)
- Full control of vehicle lights, audio. (USB ODB II Interface / Relay system)
Detecting a DDOS attack
Here are some tips to detect whether you are being DDOS’d
1) SSH into the terminal and type the following
netstat -anp |grep 'tcp\|udp' | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n
This should tell you how many connections each IP has to the server. Anything over 50 is pretty excessive.
2) Check bandwidth graphs
See if your host offers Cacti bandwidth graphs, if they dont, why not install it yourself?
Visit http://www.cacti.net/ for more information
See what the current bandwidth usage is, if it is way higher than normal, obviously there is something going on.
5) See what traffic is going through your server, it could be extremely excessive.
tcpdump -l should only average merely a few lines per second.
type the following and you can try and pick through the data with wireshark.
tcpdump -i <interface> -s 65535 -w <some-file>
Verify file transfer with md5 checksum in linux
Heres the simple version of information ive found on howto verify a file transfer with md5 checksums in linux. (cygwin works too)
cd into the source directory and type the following
find -type f -exec md5sum "{}" \; >> md5source.txt
next, navigtate to your destination and use the following
md5sum -c /path/to/source/md5source.txt
You can also use the diff command to verify the files are the same
diff --recursive /DIR1/ /DIR2/
Posted for personal reference, maybe it will help someone out there.
Later days!
Read MoreUpload firmware HP laserjet printer in Ubuntu
Ive been battling an HP Color Laserjet 3000dn for a while now. When it loads i get an error saying
RFU LOAD ERROR
DOWNLOAD FILE NOW
SEND RFU UPGRADE
I found what to do and will share my wisdom below.
For Ubuntu Lucid Lynx
1) First, plug the printer in with a USB cable
2) Add the printer using the gnome printer utility found in
System > Administration > Printing
Look for a printer with the name “Upgrade” in the name, mine was Hewlett-Packard-HP-LaserJet-USB-Upgrade.
Now finish the printer install by selecting the default PS driver.
3) Once the printer is added Set it as your DEFAULT printer
4) Goto HP’s Website and download the .RFU firmware file
http://welcome.hp.com/country/ca/en/cs/support.html
It’s usually in the “Cross operating system (BIOS, Firmware, Diagnostics, etc.)” category
5) Download the UNIX version and uncompress the file to your desktop
6) Open a terminal and type the following
lpr /home/USER/Desktop/FILENAME
USER being your username and FILENAME being the name of the .RFU file you downloaded.
ex:
lpr /home/bcl/Desktop/lj3000fq_46.041.2.rfu
The printer will now show a progress %
Once the upgrade is complete the printer will reboot and be good as new!
Hope this helps!
Read MoreAudio problems with Ubuntu 9.10 – the Karmic Koala
I’ve been having the hardest time with audio in Ubuntu Karmic Koala. Below are some fixes and information that might help other with the same issues.
References
http://ubuntuforums.org/showthread.php?t=776739&highlight=perfect+pulse+audio
http://ubuntuforums.org/showthread.php?t=997506
http://ubuntuforums.org/showthread.php?t=922860
http://ubuntuforums.org/showthread.php?t=843012
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