rsync is a powerfull tool to synchronize the files and directories. Can be use for local or remote using ssh.
Source Tutorial : https://www.thegeekstuff.com/2010/09/rsync-command-examples/
Syntaxrsync options source destination
The apache benchmark tool is very basic, and while it will give you a solid idea of some performance.
Some parameters:
To create a bootable USB memory on linux you have several solutions. The famous dd is the most powerful solution, but use carefully. Because a very small error may destroy all your data.
ArgumentsResolver, ArgumentsResolverInterface, Bytes, Color, Crypt, DiffArray, Environment, Html, Image, NestedArray, Number, OpCodeCache, Random, Rectangle, SafeMarkup, SortArray, Tags, Timer, ToStringTrait, Unicode, UrlHelper, UserAgent, Variable, Xss
Example 1 : With DOMDocument: (Fast (0.0002 sec) but can have php warning)