Redox is a Unix-like microkernel operating system written in the programming language Rust, a language with focus on safety and high performance.
Redox is inspired by previous kernels and operating systems, such as Minix or BSD.
The Redox OS Kernel is a hybrid kernel that supports X86_64 systems and provides Unix-like syscalls for primarily Rust applications.
The website can be found at
After download iso file we can start Virtual Machine with Redox:

root / password

Have a fun ☺



             is an operating system designed to be compatible with Microsoft Windows software.

We use iso file from

After download we create virtual machine and start to install:

Now we can use ReactOS J


this is first day of: MikeOS
MikeOS is an operating system for x86 PCs, written in assembly language. It is a learning tool to show how simple 16-bit, real-mode OSes work, with well-commented code and extensive documentation. Features:
A text-mode dialog and menu-driven interface
Boots from a floppy disk, CD-ROM or USB key
Over 60 system calls for use by third-party programs
File manager, text editor, image viewer, games...
Includes a BASIC interpreter with 46 instructions
PC speaker sound and serial terminal connectionThe code is completely open source (under a BSD-like license), and is written by Mike Saunders and other developers.

To run with VM Player:
- Download zip file from
- Create new machine with option “Other”
After all we can use MikeOS  J

Rbash - way to restrict what users can do on your Linux systems.

Rbash - limited shell
If Bash is started with the name rbash, or the --restricted or -r option is supplied at invocation, the shell becomes restricted. A restricted shell is used to set up an environment more controlled than the standard shell. A restricted shell behaves identically to bash with the exception that the following are disallowed or not performed:

Changing directories with the cd builtin.Setting or unsetting the values of the SHELL, PATH, ENV, or BASH_ENV variables.Specifying command names containing slashes.Specifying a filename containing a slash as an argument to the . builtin command.Specifying a filename containing a slash as an argument to the -p option to the hash builtin command.Importing function definitions from the shell environment at startup.Parsing the value of SHELLOPTS from the shell environment at startup.Redirecting output using the ‘>’, ‘>|’, ‘<>’, ‘>&’, ‘&>’, and ‘>>’ redirection operators.Using the exec builtin to replac…

Quick UDP Internet Connections

What is QUIC?

QUIC (Quick UDP Internet Connections) is a new transport protocol for the internet, developed by Google.

QUIC solves a number of transport-layer and application-layer problems experienced by modern web applications, while requiring little or no change from application writers. QUIC is very similar to TCP+TLS+HTTP2, but implemented on top of UDP. Having QUIC as a self-contained protocol allows innovations which aren’t possible with existing protocols as they are hampered by legacy clients and middleboxes.
Key advantages of QUIC over TCP+TLS+HTTP2 include: Connection establishment latency Improved congestion control Multiplexing without head-of-line blocking Forward error correction Connection migration

more / source:

Evolution of Unix and Unix-like systems

The ‘Unix philosophy’ originated with Ken Thompson's early meditations on how to design a small but capable operating system with a clean service interface. It grew as the Unix culture learned things about how to get maximum leverage out of Thompson's design. It absorbed lessons from many sources along the way.

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Directory contents -  Unix-like operating systems.

Directory structure and directory contents in Unix-like operating systems
- image from