Extending a ext4 partition without losing data

umount /boot

parted /dev/sdb

(parted) print

Model: ATA Patriot Torqx 2 (scsi)
Disk /dev/sdb: 32.0GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
1 1049kB 12.9GB 12.9GB primary type=83
2 12.9GB 13.0GB 107MB primary ext4 type=83

(parted) rm 2

(parted) mkpart

Partition type? primary/extended? primary
File system type? [ext2]?
Start? 12.9GB
End? 13.4GB

(parted) quit

resize2fs /dev/sdb2

resize2fs 1.42.6 (21-Sep-2012)
Filesystem at /dev/sdb2 is mounted on /boot; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 2
The filesystem on /dev/sdb2 is now 498688 blocks long

IEEE 802.3 vs EthernetII

IPv4/6 uses Ethernet II frame format almost exclusively. In 802.3 there must be a LLC/SNAP header to indicate which upper layer protocol to use. The first 20 bytes of both framing format are the same. The differences is

• 802.3 : uses a 2 bytes length field
• EthernetII: uses a 2 bytes type field. 

To differentiate between them 802.3 values < 0x0600 (1536), Ethernet II >= 0x0600

802.2 LLC header:

DSAP address	SSAP address	Control field	Information field
8 bits	8 bits	8 or 16 bits	N * 8 bits

802.2 SNAP haeder:

LLC			SNAP
AA	AA	03	00	00	00	08	00
			3 octet OUI			2 octet TYPE-field

Windows 2008/7 Network Discovery

To allow your computer and shared resources to be visble in network list.

• Start "Function Discovery Resource Publication"
• Set Firewall to allow Network Discovery

When you use Network and Sharing Centre-> Change advanced sharing settings

• To turn on network discovery , Function Discovery  started, SSDP Discovery  started, UPnP device hoststarted

Hyper-v management

http://blogs.msdn.com/b/virtual_pc_guy/archive/2008/01/17/allowing-non-administrators-to-control-hyper-v.aspx

Runnning a program as a priviledged user

1. Using impersonation code:
2. Uisng App manifest in a .net project :
• create a new App.Manifest item in project and add
3. using powershell command to spawn a new process:
• $password = ConvertTo_SecurityString "password"
• $cred = New-Object System.Management.Automation.PSCredential("username", $password)
• start-process process-name -verb RunAs $cred

Cloud storage explorer

http://azurestorageexplorer.codeplex.com/

C# invoke Powershell

http://www.codeproject.com/Articles/18229/How-to-run-PowerShell-scripts-from-C
http://www.devx.com/tips/Tip/42716

Impersonation in c#

http://www.codeproject.com/Articles/10090/A-small-C-Class-for-impersonating-a-User