If problems occur while starting the Open Source Architecture Daemons the issue can have multiple problem causes. This service is used amongst others in combination with Spacewalk, Red Hat Satellite, or SUSE Manager to push configuration jobs or software packages.

The following problem causes are possible:

• The …

Use the following commands to completely disable IPv6 under RHEL / CentOS up to version 6:

1# echo "options ipv6 disable=1" > /etc/modprobe.d/ipv6.conf
2# chkconfig ip6tables off
3# shutdown -r now

A module parameter prohibits IPv6 functionality after the next reboot. If this value wasn't set, some services …

txqueuelen is one of many configurable networking parameters. This paremeter defines the queue size in which the kernel stores data before it is sent over the network. By default this parameter has a value of 1000 - depending on your application you might want to increase this value using ifconfig or ip:

1# ifconfig …

On RHEL or CentOS 5.3 it is possible that a noticed default gateway is ignored. In this case the routing table doesn't contain any appropriate entry...

1# netstat -r|grep default

...even if the gateway was noticed both in the main network configuration...

1# cat /etc/sysconfig/network
2...
3GATEWAY=10.24.36.1

...and …

Red Hat Network Satellite and SUSE Manager are two management suites for the Linux enterprise distros Red Hat Enterprise Linux and SUSE Linux Enterprise Server.

At first sight these products look very similar to each other and there are also technical analogies because the products are based on the same core code: …

If you install and configure a Postfix mail server for relaying mails using an external smarthost you might be puzzled about the following error message:

1Mar 19 17:00:22 hostname01 postfix/smtp[2003]: warning: SASL authentication failure: No worthy mechs found

The reason for this issue can be really trivial - in my …

Hint: The following issue has been fixed by a RHEL / CentOS patch (util-linux-ng) - just update your system!

If you want to install Open Monitoring Distribution on RHEL or CentOS 6.4, you might have the problem that creating sites isn't working as expected:

1# omd create test
2Adding /omd/sites/test/tmp to /etc/fstab. …

It is possible that the DELL OMSA inventory collector crashes on 64-bit RHEL systems with the following error message:

1# /opt/dell/srvadmin/sbin/invcol
2/opt/dell/srvadmin/sbin/invcol: ./invcol: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory

What a pity! This issue needs to be fixed if you want to …

Today Red Hat released the fourth update of Red Hat Enterprise Linux 6. After 8 months there's also another update that brings a lot of fixes and new features.

The Release Notes für RHEL 6.4 are, as usual, very considerably - I personally think, that the following updates are specially mentionable:

Kickstart

Using th …