You may see the following notice in the system log. You need to raise the max open file in both system limit file and named configuration. Edit /etc/security/limits.conf and add : named soft nofile 4096 Inside the /var/named/chroot/etc/named.conf, add in the option section : files 4096;
On RHEL Linux v5, you may expect the following message in your system log : named[xxxxx]: network unreachable resolving ‘vhost.domain.tld/A/IN’: xxxx:xxx:xx::xxx#53 This is because by default, named try to listen IPv6 even if there is no IPv6 configured on the host. So you need to modify /etc/sysconfig/named and add the following parameter to tell bind… Read More »
In some rare occasion, automatic upgrade of WordPress core may fail. I’ve seen this case on low remaining Web server memory and apache reload during updating process. When updating, WordPress create a file on the web root folder to temporary put the site unavailable during the update process. You need to delete the file “.maintenance”… Read More »
If you are running OSX on a laptop or computer that is powered off or sleeping between 3 h 15 and 5 h 30 am, you may need to execute the maintenance script from command line by yourself to clean up your system from old system logs and temporary files. To do so, execute the… Read More »
This procedure is about creating a ISO image file from CD/DVD using the command line on a Mac OS X. First, you can retrieve information about the media with the following command : drutil status Then, the disk must me unmounted to proceed : diskutil unmountDisk disk1 Ok, let’s make the ISO file now :… Read More »
Changing the default hostname and make it permanent is quite easy. You can go through preference panel or using the command line : scutil –set HostName HOST_NAME Once you’ve pressed enter, you’ll be prompted to enter the admin password.
To right click on Windows object on Parallels Desktop with Mac OSX coherence mode, just press the following key : SHIFT + CONTROL + Click on the object.
You may notify in /var/log/messages the following error about smbd daemon regarding the cupsd printing service : smbd[5955]: [2011/05/13 15:03:59, 0] printing/print_cups.c:cups_connect(69) May 13 15:03:59 neptune smbd[5955]: Unable to connect to CUPS server localhost:631 – Connection refused This occur when the service is disabled. If you do not have a printer and do not want… Read More »
From Windows 2000 to 7, you can make the OS login automatically using a password protected account without entering any password. Follow theses steps : – Press the Windows key + R on your keyboard to launch the “Run” dialog box ; – Type in run text box control userpasswords2 , Press Enter ; –… Read More »
By default, Exchange use the local name for the ReceiveConnecter, which could be problematic with anti-spam measures on most MTA on the Internet. This is recommended to use your reverse dns name (FQDN), which in most case, should or must be the MX record. To do so, open the Exchange Management Shell and use the… Read More »