This tutorial is about how to replace a failed member of a Linux software RAID-1 array. You can monitor the status of your software RAID array through mdadm with the following command : cat /proc/mdstat This is the kind of output you’ll get in case of the secondary drive is either dead or no longer… Read More »
You may experience this error shown on “dmesg” or system logs (/var/log/messages) : IPv6 addrconf: prefix with wrong length 126 This actually indicate a device on your network trying to broadcast IPv6 information that dosen’t match your network configuration. To get rid and disable this, simply run the following commands as root : echo 0… Read More »
Since there is no longer any shortcut to start Internet Explorer 9 without addons, in safe mode on Windows 7, here is how to achieve that : The first, and quick method would be to simply type the following command into the search bar located at the bottom of the start menu : iexplore -extoff… Read More »
You may experience this issue trying to log into a computer which is a member of a Active Directory network : No Logon Servers Available to service the Logon request. This issue may actually resolved by removing the computer from the domain, reboot and join the domain again.
This tutorial is about automatically login a user on domain with on a Windows 7 workstation. 1. Open the registry editor : Start > Run > regedit 2. Browse to : HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ CurrentVersion \ Winlogon 3. Turn on the auto logon key : AutoAdminLogon 1 4. Set… Read More »
Having issues and downtime after installing latest updates using “yum update” is always a possibility. This is why having a development environment is so much important when you are running a mission critical infrastructure. However, there is an intermediate solution : using the rollback feature included in Yum. Note this option is actually not enabled… Read More »
I rescently experienced this issue with OpenFiler which I never had before. Trying to create a volume into a block device simply don’t work – nothing happen when you click to do so. The only difference between this installation and the previous one is the OpenFiler system is installed on another drive/block device than the… Read More »
Here is a quick tip how to install VMware Tools on the OpenFiler SAN Linux distribution. OpenFiler is based on rPath Linux. Since there is no binaries provided by VMware for guests tools, the first way is to compile them from source using gcc. But, rPath do have Open VMware Tools in their repository, so… Read More »
A few utilities are available to test the disk I/O performance. The easy way to do it without installing anything on the system would be running this simple command : time dd if=/dev/zero of=/tmp/test-hd bs=1M count=1000 Another, more complete tool I recommend is “SysBench”. http://sysbench.sourceforge.net/docs/
Lost your root password for MySQL? Follow this simple procedure to reset it. Of course, you need at least root access level on your operating system to proceed. 1. Stop MySQL database server : /etc/init.d/mysql stop 2. Start MySQL with “skip grant table” option : mysqld_safe –skip-grant-tables & WARNING! This is VERY insecure – while… Read More »