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

Linux copy and clone USB stick including partitions command

last updated August 11, 2018 in CentOS, Debian / Ubuntu, Linux, RedHat and Friends, Suse

I need to copy and clone existing data from a USB stick. How do I clone a bootable USB key/pen drive on Linux? How do I clone a USB stick including partitions on Linux operating system?

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

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

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

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

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

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

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

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

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

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

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

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

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?