Delete unmapped multipath drive: couldn’t get target port group
When we go to delete a lun that is no longer mapped, we may get this error sdXX: couldn’t get asymmetric access stateAfter unmapping the LUN from the SAN storage… Read more »
Tag: Oracle Linux
Apache/Httpd Web Server Hardening and Security Guide
The Web Server is a crucial part of web-based applications. Apache Web Server is often placed at the edge of the network hence it becomes one of the most vulnerable… Read more »
How to display processes using swap space
Identify and print processes using swap space to get a better understanding of the Linux operating system. Display processes using swap space Use the following command to simply display processes… Read more »
Setting and Controlling IP sets using firewalld
Today we see the list of IP set types supported by firewalld, enter the following command as root. ~]# firewall-cmd –get-ipset-types hash:ip hash:ip,mark hash:ip,port hash:ip,port,ip hash:ip,port,net hash:mac hash:net hash:net,iface hash:net,net… Read more »
How to disable Transparent Huge Pages on CentOS/RedHat
Hi there! I’d like to show you how to disable Transparent Huge Pages on CentOS/RedHat 7. First question you might ask – why do you even want to disable Transparent… Read more »
Tuning MongoDb for Linux
In this post, we’ll discuss tuning Linux for MongoDB deployments. By far the most common operating system you’ll see MongoDB running on is Linux 2.6,3.x. and 4.x (only Oracle Linux… Read more »
iptables blacklist script
A Bash shell script which uses ipset and iptables to ban a large number of IP addresses published in IP blacklists. ipset uses a hashtable to store/fetch IP addresses and… Read more »
How to install Oracle VM 3.4
Oracle VM for X86 is a native hypervisor which is directly runs on the host’s hardware.This hypervisor is based on xen technology and it requires very small footprint on the… Read more »