nixCraft - Linux and Unix tutorials for new and seasoned sysadmin

How to install and configure OpenVPN client on OpenBSD

June 21, 2018June 21, 2018in Cryptography, Networking, OpenBSD, OpenVPN last updated June 21, 2018

I have a file named openvpn.client.ovpn. How do I use this file to connect my OpenBSD based desktop to remote OpenVPN server and setup secure VPN? How do I configure OpenVPN client on OpenBSD Unix system?

How to install and enable Bash auto completion in Fedora Linux

June 20, 2018June 20, 2018in Fedora Linux, Linux, Package Management last updated June 20, 2018

I am a new Fedora Linux user. How do I install and enable Bash auto completion in Fedora Linux server?

How to add encrypted ZFS pool on FreeBSD server

June 19, 2018in File system, FreeBSD last updated June 19, 2018

I recently added hard disk to my FreeBSD based server. How do I configure an encrypted ZFS pool to store data on this disk? How can I add encrypted ZFS pool on FreeBSD 11.x server?

How to add cron job on Asuswrt Merlin Wifi Router

June 18, 2018June 19, 2018in Linux, Networking, nfs, Storage, Wireless Networking last updated June 19, 2018

How can I add or delete cron jobs on my wifi router powered by Asuswrt Merlin firmware? How do I add cron job on Asuswrt Merlin Wifi router using command line?

How to open DNS port 53 using ufw on Ubuntu/Debian Linux

June 11, 2018June 11, 2018in Debian / Ubuntu, Iptables, Security last updated June 11, 2018

How do I allow incoming DNS tcp/udp port 53 connections from a specific IP address or subnet on a Ubuntu or Debian Linux server using ufw? How can I open DNS port 53 using ufw firewall?

How to Restart Linux server using putty ssh client on Windows

June 6, 2018June 6, 2018in Linux, Windows last updated June 6, 2018

I am using Windows version 7 or 10 on my desktop. How can I use putty client to restart Linux server? What is the procedure to restart Linux server using putty from Windows 7 or 10 desktop?

How to reset a KVM clone virtual Machines with virt-sysprep on Linux

June 3, 2018June 3, 2018in CentOS, Debian / Ubuntu, Linux KVM, RedHat and Friends, Suse, Virtualization last updated June 3, 2018

I know how to clone a KVM VM. Once cloned I would like to reset cloned VM. How do I reset, unconfigure or customize a virtual machine so clones can be made? How can I reset a KVM clone virtual Machines with virt-sysprep command on a Linux server based hypervisor?