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Backup Master Boot Record

Nishant

Apr 20, 2010 • 1 min read

dd if=/dev/sda of=/tmp/mbr.img bs=512 count=1

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SIOCSIFFLAGS: Operation not possible due to RF-kill

Apparently some linux distros soft block bluetooth and wifi by default. If you get this error message : SIOCSIFFLAGS: Operation not possible due to RF-killThen that may be because the wireless adapters have been soft blocked. You can check for this by issuing the command: rfkill list If the adapters that

Nishant Aug 27, 2021 • 1 min read

Install Docker on Centos 7

Install Docker: yum install docker docker-registry systemctl enable docker.service systemctl start docker.service systemctl status docker.service Install Docker Compose: curl -L "https://github.com/docker/compose/releases/download/1.23.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose chmod +x /usr/local/bin/docker-compose

Nishant May 9, 2019 • 1 min read

Ntpdate Not syncing time correctly – Xen Host

I came across a situation where ntpdate would not sync the time correctly in a Xen Virtual machine. The time was 10 minutes ahead of what it was supposed to be. Apparently , you need to force it to not use the dom0’s clock. vi /etc/sysctl.conf xen.independent_

Nishant Jan 6, 2015 • 1 min read

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