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 »
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 »
Here is the steps required to test and send an e-mail using the command prompt and Telnet. See the commands required below : EHLO MAIL from: RCPT to: DATA From: To: Subject: . QUIT Here is an overview of what you’ll get with the commands in bold : # telnet smtp.domain.tld 25 Trying 0.0.0.0… Connected… Read More »
Having this error while trying to test connection between your machine and R1Soft server? ERROR: Could not authenticate agent ERROR: Agent authentication failed. ERROR: AGENT: host (0.0.0.0) port (00000) failed authentication ERROR: AGENT: RSA decrypt failed This mean your server have a different authentication key than expected. You need to remove the current key and… Read More »
Having this error performing task on your MySQL database? Couldn’t execute ‘SHOW TRIGGERS LIKE ‘table_name”: Got error 28 from storage engine (1030) This might happen under those two circumstances : – Your filesystem is full > [ make some room or add more storage! ] – You’ve reached the maximum open file > [ increase… Read More »
Getting this error for NewRelic module after PHP update from 5.3 to 5.4? newrelic.so: undefined symbol: php_end_ob_buffer in Unknown on line 0 This mean the module is not compatible with your new PHP version. To resolve this matter, follow these easy steps. Uninstall NewRelic completely : yum remove newrelic-daemon newrelic-sysmond newrelic-php5 newrelic-php5-common Then reinstall : yum… Read More »