Installing docker with Ubuntu 16.04 LTS, Mint 17 and CentOS 7

Installing docker with Ubuntu 16.04 LTS, Mint 17 and CentOS 7
A brief introduction to virtualization
Today we will learn installing docker with Ubuntu, mint and CentOS 7 Linux,  Before the evolution of the concept of virtualization, to run one application one dedicated server was required,  if you wanted to  run 20 …Read More

Make Samba Go Faster

Make Samba Go Faster

Make Samba Go Faster
After installing a wired gigabit network in my house I tested the performance in the network using shares (Windows – samba installed centos 7). I got around 500-600MBit/sec in read speeds and about 600-700MBit/sec in write speeds. But why ?

After looking at the samba configuration file I saw …Read More

CSF ConfigServer Firewall

Install and Configure CSF ConfigServer Firewall

Install and Configure CSF ConfigServer Firewall
About CSF Firewall
ConfigServer Security and Firewall, also known as CSF, is an opensource software firewall application. It is working based on iptables. Firewall configuration script created to provide better security for your server while giving you an easy to use, advanced interface for managing your firewall …Read More

20 IPtables Examples For New SysAdmins

Configure FirewallD in RHEL/CentOS 7 and Fedora 21/22

In a previous post I’ve showed how to disable firewalld and roll back to our favorite post-systemd iptables firewall. In this post we gonna see how to Configure FirewallD in RHEL/CentOS 7 and Fedora 21/22.

Firewalld is a dynamic daemon to configure and manage firewalls (iptables rules typically) with support for …Read More

Console commands to hibernate and standby / sleep Linux machines

Console commands to hibernate and standby / sleep Linux machines

It’s great that Linux nowadays supports all the power management features available on computers. But it’s odd that beside the buttons to trigger standby/hibernate – which are only available in a graphical interface – there are no simple console commands to put the computer to sleep or into hibernation.

Standby and …Read More

Linux: How to kill a TCP connection using netstat?

Linux: How to kill a TCP connection using netstat?

You cannot kill a TCP connection using netstat utility. netstat is use for

Display network connections
Routing tables
Interface statistics
Masquerade connections
Multicast memberships
And much more

However Linux support two other commands or utility that can be used to kill a TCP connection.
tcpkill command
Use tcpkill command to kill specified in-progress TCP connections. It is useful for …Read More