GPG error:public key is not available

I have a NAS, and when i try to run apt-get update, I got a series of warning messages  like below

W: GPG error: http://ftp.us.debian.org squeeze Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY AED4B06F473041FA NO_PUBKEY 64481591B98321F9

W: GPG error: http://ftp.us.debian.org wheezy Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8B48AD6246925553 NO_PUBKEY 7638D0442B90D010 NO_PUBKEY 6FB2A1C265FFB764

This link gave me the solution. You copy your keys, and run the following command


sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys AED4B06F473041FA

You can either run it for each key, or separate each key by space

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys  AED4B06F473041FA 64481591B98321F9

WCF: How to get application physical base directory

I am generating a temp file in my WCF and wanted to store in a Temp folder inside my WCF.

HTTPContext does not apply for WCF, so we can't use that to get the base directory

Environment.CurrentDirectory => Will provide you the debug/bin directory

AppDomain.CurrentDomain.BaseDirectory => Will provide you the debug/bin directory as well.

System.Web.Hosting.HostingEnvironment.ApplicationPhysicalPath => Will provide you the Application base directory.

Note that, System.Web.Hosting.HostingEnvironment.ApplicationPhysicalPath will work only if you host the WCF Service as Web application..

If you host the WCF Service from console, it will always return null.

HTTP could not register URL

I was trying to run a service with a non admin user (rmanni), and when I start the service, I got the error

HTTP could not register URL http://+:8080/MyService/. Your process does not have access rights to this namespace

To solve the issue Microsoft said, I need to add the url using netsh command as mentioned here

This command solved it for me

netsh http add urlacl url=http://+:8080/MyService user=myDomain\rmanni

 

Oracle: Reset SYS Password

Follow this exercise only if you forgot both SYS and SYSTEM password.

This is not the utility to renew the current password

IF you forgot SYS and SYSTEM password in Oracle

If you forget or lost both SYS and SYSTEM password, you can reset them without logging in to the database.

Here is a cool utility to reset SYS and SYSTEM password, if you ever loose or forget the passwords for these account.

This is tested in Windows box only ( orapwd should work in Unix too)
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1) Go to services ( start -> Run->Services.msc)
2) Stop all Oracle services.
3) Find PWDxxxx.ora file. It is usually located in the Oracle\product\11.x\db_x\database.
xxxx stands for your Oracle SID. For example, if you database is called ORCL, then the file will be PWDorcl.ora
4) Back up the existing file (just rename the file).
5) Generate new PWDxxxx.ora file using orapwd utility.
6) Go to command prompt, type
ORAPWD file=path_to_the_PWDxxx.ora_file password=zzzz
zzzz will the new password for both SYS and SYSTEM account



7) Now you will see a new PWDxxx.ora file generated.
8) Restart your Oracle service
9) You should be able to connect to the database with the new password.

android damaged sd card

My phone crashed while loading a game, and upon reboot it said "Damaged SD card", consider rebooting it.

When I connected my SD card to my laptop (via a cardreader/SD Adapter), It was able to read all files, so the SD card wasn't really damaged.

I ran the following command via command prompt, and it fixed it

chkdsk /x /f <sd card drive>

/x stands for "Forces the volume to dismount first if necessary. All opened handles to the volume would then be invalid"

/f stands for "Fixes errors on the disk."