SELINUX Setup
view /etc/selinux/config
sed -i 's/SELINUX=enforcing/SELINUX=permissive/g' /etc/selinux/config reboot
Continue reading “How to configure ICINGA2 Monitoring server on CentOS / RHEL 7”
Red Hat Enterprise Linux 7 / CentOS 7
rpm -ivh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
yum update Continue reading "How to enable and use EPEL Repo in RedHat / CentOS Linux"
Systemd is an init system and system manager that is widely becoming the new standard for Linux machines. While there are considerable opinions about whether systemd is an improvement over the Continue reading “How To Use Systemctl to Manage Systemd Services and Units”
Before you Install MRTG please verify apache is installed on your machine
[root@mysql01 ~]# vi /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.49.19 mysql01 Continue reading "How to Install MRTG with SNMP on Linux RedHat 6.5 / CentOS 6.5"
Install PosgreSQL
3.1.1. Type ‘yum install postgresql*’ making sure to include the asterisk (*) 3.1.2. Type ‘y’ when prompted (happens twice)
Confirm java version
4.1. Type ‘java –version’ 4.2. Confirm it’s running at least 1.6 and using OpenJDK (or Oracle/Sun Java or JRockit, but NOT GNU Libgcj)
VPN INSTALLATION on Linux
[root@app-01 ~]# uname -a Linux app-01 2.6.32-431.11.2.el6.x86_64 #1 SMP Tue Mar 25 19:59:55 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
[root@app-01 /]# mkdir download [root@app-01 /]# cd download/ [root@app-01 download]# ll total 0 [root@app-01 download]# mkdir vpn [root@app-01 download]# cd vpn/ [root@app-01 vpn]# ll total 0
Continue reading "VPN CLIENT INSTALLATION on Linux"
How to verify DDOS attack with netstat command on Linux Terminal
Some examples with explanation
netstat -na
This display all active Internet connections to the server and only established connections are included.
netstat -an | grep :80 | sort
Continue reading “How to verify DDOS attack with netstat command on Linux Terminal”
NFS SERVER SETUP ON CETNOS 6.5 / Redhat 6.5 / Fedora
In this tutorial let us see how to install and configure NFS server and how to share files between NFS server and clients. Though i have tested these steps in Cent-OS 6.5 32 bit edition, it will work on RHEL/Fedora/ 64 bit architecture.
Scenario
NFS Server Operating System : CentOS 6.5 64 bit (Minimal server install)
NFS Server Operating System : CentOS 6.5 64 bit (Minimal server install)
NFS Client Operating System : CentOS 6.5 64 bit (Desktop Minimal)
NFS Server IP Address Host rackspace-nfs01: 192.168.58.152
NFS Server IP Address Host rackspace-nfs02: 192.168.58.153
NFS Client IP Address Host rackspace-jon: 192.168.58.154
