LinuxHostingSupport

You may receive the “configure: error: Ogg needed” while installing libogg which indicates some missing devel packages related to Ogg. The complete error message is as follows:

Could not run Ogg test program, checking why... 

The test program compiled, but did not run. 

This usually means that the run-time linker is not finding Ogg 

or finding the wrong version of Ogg. configure: error: Ogg needed!

This requires the installation of libogg and libvorbis devel package which is available with yum. SSH to the server as root and install the packages

# yum install libogg-devel libvorbis libvorbis-devel

Once done, you will be able to install libogg package.

How to install the nslookup, host OR dig commands in Linux?

Sometimes you are unable to use the nslookup, host OR dig command on your Linux server and receives the following message

-bash: nslookup: command not found 
-bash: host: command not found 
-bash: dig: command not found

This indicates that the DNS package “bind-utils” isn’t installed during the OS installation. The ‘bind-utils’ package install nslookup, host, dig and other DNS related commands.

Installation:
SSH to your server as root and execute

# yum install bind-utils

Once done, you will be able to use host, nslookup etc

# host domain.tld

  domain.tld has address 1.1.1.1

# nslookup domain.tld

  Name: domain.tld Address: 1.1.1.1

Qmail allows a maximum of 10 local and 20 remote email deliveries/processes simultaneously by default. The concurrencylocal and concurrencyremote files are the ones which handles the concurrent local and remote email deliveries respectively.

To increase the number of email deliveres/processes, you have to increase the values in the concurrencylocal and concurrencyremote files and restart the Qmail service.

The concurrencylocal and concurrencyremote files resides in the /var/qmail/control directory. If the files are not present, you have to create them

# vi /var/qmail/control/concurrencylocal

# vi /var/qmail/control/concurrencyremote

set the required value and restart the qmail service

# service qmail restart

Once done, you can manage the Qmail mail queue using Qmhandle.