It’s possible to tell the kernel of your Xen guest VM to synchronize or not the clock with the physical host machine. There are numerous reason why you would or not to use this feature (such as your guest VM is behind or forward the clock over time). To find out the current setting, simply… Read More »
VMware ESXi management IP/vSphere connectivity might become suddenly unavailable over the time or after replacing the network interface card. This can be easily resolved by removing the vmnic port groupe for the management network and add it back again to the vSwitch. You will need direct console access to the ESX shell to perform these… Read More »
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 »
Having this error on your RHEL/CentOS 6 Web server or issuing “php -v” command? PHP Warning: PHP Startup: Unable to load dynamic library ‘/usr/lib64/php/modules/module.so’ – /usr/lib64/php/modules/module.so: cannot open shared object file: No such file or directory in Unknown on line 0 Then you probably have “php-mcrypt” module installed. Apparently, the “mcrypt.ini” file do not have… Read More »
Ending up with this kind of error booting a guest machine on your Xen hypervisor? Running: xm create /cloud/config/hjxmogr553e5jx Using config file “/cloud/config/hjxmogr553e5jx”. Error: Unable to connect to xend: No such file or directory. Is xend running? Fatal: Virtual machine has not been started on hypervisor Executing Rollback… The two possible causes would be the… Read More »
Monitoring your temperature hardware on Linux made easy with “lm_sensors“. On CentOS or RedHat Enterprise, you can easily install the software using Yum as followed : yum install lm_sensors Then, you need to configure the software to monitor your hardware. You will have to answer several YES/no questions to probe your system. Just do the… Read More »
Here is a quick how to show hidden files and folders in OSX Mavericks 10.9. Using the terminal, do the following command to show a specific hidden folder. This example assume you want to display the “Library” folder contain in your user profile : sudo chflags hidden /Library/ ~/Library/ If you’d like to show all… Read More »
Getting this alert with one of your server backup policy with R1Soft? “Error Server [11] reset(): database disk image is malformed(11)” This is because the VSS snapshot mechanism on Windows allow only one snapshot partition at a time. It’s likely that you are using the MSSQL plugin to backup your databases with MSSQL installed on… Read More »
Getting this error message with RoundCube Webmail in your Apache logs? [Sun Jan 12 05:53:51 2014] [error] [client 0.0.0.0] PHP Warning: finfo_open(): Failed to load magic database at ‘/usr/share/misc/magic’. in /path/to/roundcube/program/lib/Roundcube/rcube_mime.php on line 727, referer: https://roundcube.domain.tld/?_task=mail&_action=preview&_uid=122332&_mbox=INBOX&_framed=1&_caps=pdf%3D1%2Cflash%3D1%2Ctif%3D0 Make sure the path to “libmagic” is correct. Edit your “config/main.inc.php” file. You might (by default) have the following… Read More »
Getting this error doing a commit after assigning a subnet to a L3-interface vlan on your Juniper device? user@EX4200# set interfaces vlan unit 100 family inet address 1.1.1.1/8 user@EX4200# commit synchronize comment “add subnet to vlan 100” [edit protocols] ‘bgp’ [edit protocols] ‘ospf3’ [edit interfaces vlan unit 100 family inet] ‘address 1.1.1.1/8’ Cannot have the… Read More »