While creating a VMFS storage I received the following error yesterday:

1Call "HostDatastoreSystem.QueryVmfsDatastoreCreateOptions" for object "ha-datastoresystem" on ESXi "xxx.xxx.xxx.xx" failed.

First I thought the freshly created logical drive on my HP RAID contorller had a failure - but this …

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 …

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  alt="OpenVPN-Profile"
  
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    src="https://cstan.io/images/2013/05/1-Profile.jpg"
  
  
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</picture>

OpenVPN …

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: …

nslookup and ifconfig are two well-known tools for configuration the network of Unix/Linux hosts and checking whether DNS is working properly.

ifconfig was part of the 4.2BSD distribution in 1983 for the first time and quickly became the standard tool for network configuration - even commerical Unices like Solaris or …