If you are using SSD and want to securely wipe it (so no one can recover data), then you are in a trouble since it isn’t as easy as with HDD thou faster.

# Secure wipe individual file

shred -v -n 3 ./file

Thou might not be secure if your filesystem use COW (copy-on-write) (like btrfs,zfs), make shadow copies (windows, ntfs), uses RAID.

# Secure wipe entire drive

shred -v -n 3 /dev/HDD
# Or if you are paranoid - slower
shred -v -n 7 /dev/HDD

Long. Expect waiting a day or two.

We will talk about buying new drives and used ones

In short: 3-2-1 backup strategy + Disaster recovery plan.

# WhatIs Ansible?

You can think of ansible as a more easier and human-readable bash scripts that can run on almost any remote machine (E.g. GNU/Linux, network router/switch, Windows…).

It can do anything that can be done via terminal, but more reliably and on many different hosts (for instance - with different OS).

# Terminology

• Control node - machine which will run ansible

• Inventory - list of remote host, can be devided to groups.

What is safe to buy second-hand for PC?

Start HTTP server in 1 command!