By default, the submission port is TCP-587. To change to another value, edit the following file : /var/qmail/supervise/submission/run And simply change the port number just before the last line : /usr/bin/tcpserver -v -R -H -l $HOSTNAME -x $TCP_CDB -c “$MAXSMTPD” \ -u “$QMAILDUID” -g “$NOFILESGID” 0 587 \ $SMTPD $VCHKPW /bin/true 2>&1 Of course, you… Read More »
Follow these steps to add a permanent static route to Windows. 1. Open the command prompt (must be done as administrator). 2. Enter the following command and replace with your network information : route -p add <NETWORK_IP> mask <NETMASK> <GATEWAY_IP> Let’s explain in details with the following IP information… assume we want to add a… Read More »
Query refused shown on system log. unexpected RCODE (REFUSED) resolving ‘vhost.domain.tld/A/IN’: xxx.xxx.xxx.xxx#53 This indicate that one of your forwarders deny to resolve the query. You should remove/comment it.
Directory permission problem shown in system log when starting named. named[xxxx]: the working directory is not writable Owner as well as group should be “named” and both have “read-write-execute” (775) mode. sudo chmod g+w named
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.