dd command HowTo - Linux / Unix Q & A from nixCraft

How to write Raspbian Jessie image file to SD cards on Apple macOS / OS X

in Linux, Mac OS X, Raspberry Pi, UNIX last updated June 27, 2017

I got a Raspberry PI 3 from my friend. I am a long term macOS user. How do I write Raspbian image file to SD card using macOS?

How to wipe a signature from a disk device on Linux with wipefs command

in CentOS, Debian / Ubuntu, File system, Linux, RedHat and Friends, Suse, Ubuntu Linux last updated February 27, 2017

I recently decommissioned Debian Linux based nas server and moved disk from my nas server to Linux-powered desktop. However, when I run fdisk command, I am getting the following error:
/dev/sdb: device contains a valid ‘LVM2_member’ signature; it is strongly recommended to wipe the device with wipefs(8) if this is unexpected, in order to avoid possible collisions
What is a wipefs and how do I use it on Linux?

How to add disk image to KVM virtual machine with virsh command

in CentOS, Debian / Ubuntu, Linux, Linux KVM, RedHat and Friends, Suse last updated February 27, 2017

How do I add additional disk storage to a guest operating system to KVM virtual machine with virsh command on Linux operating system?

How to make disk image with dd on Linux or Unix

in CentOS, Debian / Ubuntu, FreeBSD, Hardware, Linux, RedHat and Friends, Suse, UNIX last updated August 21, 2016

How do I create disk image using dd command? How do I perform disk cloning from a live Linux cd for backup or recovery purpose?

How To Add Swap on FreeBSD Unix Systems

in File system, FreeBSD, FreeBSD Jails (VPS), UNIX last updated May 3, 2017

I need additional swap space to improve my FreeBSD Unix server/desktop performance. How do I add a swap file to FreeBSD system using command line options without creating a new partitions? How do I encrypt swap space on a FreeBSD Unix server for security purpose?

Ubuntu Linux Create and Add Swap File Tutorial

in Debian / Ubuntu, File system, Ubuntu Linux last updated December 3, 2014

I‘m a new Ubuntu Linux version 14.04 LTS user. I need additional swap space to improve my Ubuntu server performance. How can I add a swap space on Ubuntu Linux 14.04 LTS using command line over the ssh based session?

OS X: Create and use Live USB Fedora Linux Media

in Fedora Linux, Mac OS X, RedHat and Friends, UNIX last updated June 3, 2014

My new Dell Laptop has no DVD or CD drive. I’m trying to create a bootable Fedora Linux 20 USB using UNetbootin utility as described here. But, UNetbootin failed to create bootable USB image on OS X. How do I create Fedora Linux 20 USB Media in Apple OS X using command line options?