First, avoid any problem by getting two identical hard drive (or at least, same size and speed at least if not from same manufacturer). This tutorial assume both your hard disk are “da0” and “da1“. If you don’t know you’re devices name, simply use “dmesg” or “df -h” command to find out. First, let’s temporary… Read More »
To search and replace across multiple text file on a Linux/Unix system, use the following command : find . -name “*.extension” -print | xargs sed -i ‘s/search_for_text/replace_with_text/g’ So, as example, let’s assume you want to replace an IP address in multiple Bind zone file (using the extension .hosts) and replace IP address 10.10.1.1 for 192.168.1.1… Read More »
Using VMware Server on RedHat Enterprise Linux, you may expect this error in log file /var/log/secure : PAM unable to dlopen(/lib/security/pam_unix2.so PAM [error: /lib/security/pam_unix2.so: cannot open shared object file: No such file or directory] PAM adding faulty module: /lib/security/pam_unix2.so Actually, this error does not seem to affect the functionality of VMware Server. To work around… Read More »
On a multi DC (Windows 2003 – 2008) Active Directory, you may encounter the following NTDS event : Active Directory failed to create an index for the following attribute. Attribute identifier: 591789 Attribute name: msFVE-RecoveryGuid A schema cache update will occur 5 minutes after the logging of this event and will attempt to create an… Read More »
Edit /boot/loader.conf and set the following value to ” 1 ” : hint.acpi.0.disabled=”1″
Since RoundCube version 0.6, you may expect the following error when trying to delete a message : Server Error : UID COPY : Error in IMAP command received by server. You probably using Courier-IMAP daemon. As commented in “main.inc.php” configuration file for default storage folders, you need to modify the folder name according to the… Read More »
Trying to update BIOS on Dell PowerEdge server running CentOS Linux may fail to complete with no further explanation even if all software requirement has been met do do the upgrade from the OS. This is because Dell does not recognize CentOS (which is a 100% RedHat binary compatible) as a supported OS (such as… Read More »
To increase (or decrease) the size of allowed uploaded file size with PHP, using php.ini or .htaccess file, just add or edit the following values : php_value upload_max_filesize <VALUE> php_value post_max_size <VALUE> Just add the amount instead the <VALUE> tag. Let’s assume you want to allow 300 megabyte file size to be uploaded to the… Read More »
When installing and configuring Zimbra for the first time on RHEL/CentOS 6, it return that LDAP failed to initialize and then the config script exit. The log file probably indicate the following error : Initializing ldap… *** Running as zimbra user: /opt/zimbra/libexec/zmldapinitsudo: sorry, you must have a tty to run sudo IO::Socket::INET: connect: Connection refused… Read More »
VMware Server performance can be improved in so many ways… there are some recomendation that I’ve discovered when I was using this product at large before moving them to ESXi : Use preallocated virtual disk Use as less virtual hardware as possible – do not add unneeded hardware Use ext4 or XFS filesystem (if host… Read More »