Having this error message while running a “yum install” or “yum update” command on your RHEL/CentOS Linux system? Error: database disk image is malformed 1. Simply run the following command to fix this issue : yum clean all 2. Alternatively, if the problem is still persisting, then try to move the RPM database to a… Read More »
Here is two commands to wither block a single or group of IPs on the Windows Firewall using the command line. Please note that you will need elevated privileges to run these commands. 1. Block a single IP (or subnet*) netsh advfirewall firewall add rule name=”IP Block” dir=in interface=any action=block remoteip=<IP_Address>/32 *You will need to… Read More »
You probably noticed since you’ve upgraded to MacOS X Yosemite 10.10 that Java application fail yo start and the following message appear on your screen : To view this web content, you need to install the Java Runtime Environment. If you had Java JRE 1.7.x before the OS upgrade, then be aware that version prior… Read More »
With larger drive these days that exceed 2 Tb, the traditional MSDOS partition table add a barrier of 2 Tb maximum for partitions. Fortunately, the GUID Partition Table which is well known as GPT that push this limit to 18 EB (exabyte). You are probably familiar with the “fdisk” legacy partitioning tool, however this does… Read More »
Starting with Windows Server 2008 R2/2012, the fancy remote management feature may return the following error when adding to your centralized Server Manager console : Computer <NAME> cannot be managed. Verify that the network path is correct, the computer is available on the network and that the appropriate Windows Firewall rules are enabled on the… Read More »
If you have a large amount of data to transfer over the network to another server, Rsync is definately a good way to go. However, since Rsync is using SSH, data encryption can add an extra bottle neck to your speed transfer. You may want to disable encryption if you are transfering locally or if… Read More »
I had this interesting issue lately on Windows Server 2008 R2 where the shared printer just vanishing from the directory/shares on and off. Here is what I did to resolve this issue. If you do not have the Print Server role installed, you will need the Print Management Tools to actually view all your printers.… Read More »
Here is a few commands to enable or disable Remote Desktop Protocol and Remote Assistance on Windows 7 and Windows Server 2008 or greater through the command line. Enable RDP : reg add “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server” /v fDenyTSConnections /t REG_DWORD /d 0 /f Disable RDP : reg add “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server” /v fDenyTSConnections /t REG_DWORD /d 1… Read More »
UUIDs (Universal Unique Identifier) for network interface card can be generated using the following command : uuidgen <DEVICE> Example : uuidgen eth0 Then you can add it to your NIC config file (assuming your interface is eth0) : /etc/sysconfig/network-scripts/ifcfg-eth0 Add/modify the following : UUID=<uuid>
Here is a quick how to force your network interface speed and duplex on RHEL/CentOS Linux. Make sure you have the network tools installed : yum install ethtool net-tools To apply the configuration without having to restart the network service or reboot your system, simply do this command with your settings : ethtool -s <INTERFACE>… Read More »