This tip will show the non present devices in windows operating systems. When a device is plugged the driver for that device is installed for the proper functioning of that device, but later when you unplug it the device entry disappears from the Device Manager but the drivers still exist in the system. This becomes a hindrance in some situations. Recently I myself came across the error “Cannot rename this connection. A connection with the name you specified already exists. Specify a different name.” when renaming a LAN connection, even though there was no other connection by that name. This was because earlier I had an Ethernet card with a connection by that name, even after the card was removed the operating system refused to forget it :). So applying this trick worked for meContinue Reading…
Access Control Lists( (ACLs) are a way to assign fine tuned permissions in Linux apart from using the chmod command. When the chmod command is used only one owner and one group can be assigned permissions on a file or directory. If multiple users need access to a resource we need to place them in a group and then give that group the necessary permissions. But with File ACLs in Linux we can assign fine grained permissions to each user and group on a file and even deny access to a particular user even if the file has world permissions. This tutorial on Linux File ACL will explain the usage of the commands getfacl and setfacl.Continue Reading…
This tutorial explains how to configure InterVLAN routing on Cisco routers. InterVLAN routing allows communication between Virtual LANs. The first part of the tutorial explains how to configure VLAN on the switch and the second part explains how to configure InterVLAN routing on a router.
The following is the connectivity of the switch
fastEthernet 0/1 - Router fastEthernet 1/1 (VLAN 2) - PC0 fastEthernet 2/1 (VLAN 2) - PC1 fastEthernet 3/1 (VLAN 3) - PC2 fastEthernet 4/1 (VLAN 3) - PC3 fastEthernet 5/1 (VLAN 4) - PC4 fastEthernet 6/1 (VLAN 4) - PC5
The image below shows the topology of the network.Continue Reading…
A quickie explaining how to set the clock in Cisco routers and switches. Setting the correct time is important when logging the activities of a Cisco device. To display date and time use the following command in privileged mode
To set the correct time enter the following command in privileged mode
R1#clock set hh:mm:ss MONTH <Day of the month> <Year>
R1#clock set 13:35:00 oct 3 2011
This tutorial explains prestaging a computer object in the Windows Active Directory database. Prestaging means to add a computer to the Active Directory database before joining the computer to the domain. By prestaging a computer you can make sure the WDS (Windows Deployment Services) server responds only to known computers. By default if you join a computer to a domain the computer object is created in the Computers container, even though you can move it to another container later, by prestaging you can place the computer inside the container of your choice even before joining it to the domain.Continue Reading…
The ADSI (Active Directory Service Interfaces) editor is a management console that comes along with the Windows Server support tools. Using this you can edit each and every attribute of the objects present in your active directory database. The support tools for the Windows Server OS is present in the OS installation CD. It is located at
If you don’t have the OS CD you can download it from Microsoft
After installation got to Start -> Run and type adsiedit.msc to get the ADSI edit console. If you get an error message saying adsiedit.msc is not found you have to register the DLL file required for it manually. To do this go to Start-> Run and type regsvr32 adsiedit.dll.
Happy Tweaking ! 🙂