All posts in Uncategorised

▪️ CLI Tools   🔸 gvisor – container runtime sandbox.  🔸 ctop – top-like interface for container metrics. ▪️ Web Tools   🔸 Moby – a collaborative project for the container ecosystem to assemble container-based system.  🔸 Traefik – open source reverse proxy/load balancer…

Operating Systems   🔸 Slackware – the most “Unix-like” Linux distribution.  🔸 OpenBSD – multi-platform 4.4BSD-based UNIX-like operating system.  🔸 HardenedBSD – HardenedBSD aims to implement innovative exploit mitigation and security solutions.  🔸 Kali Linux – Linux distribution used for Penetration Testing,…

Mass scanners (search engines)   🔸 Censys – platform that helps information security practitioners discover, monitor, and analyze devices.  🔸 Shodan – the world’s first search engine for Internet-connected devices.  🔸 Shodan 2000 – this tool looks for randomly…

  🔸 GTmetrix – analyze your site’s speed and make it faster.  🔸 Sucuri loadtimetester – test here the performance of any of your sites from across the globe.  🔸 Pingdom Tools – analyze your site’s speed around the…

Code parsers/playgrounds   🔸 ShellCheck – finds bugs in your shell scripts.  🔸 explainshell – get interactive help texts for shell commands.  🔸 jsbin – live pastebin for HTML, CSS & JavaScript, and more.  🔸 CodeSandbox – online code editor for web…

Mail   🔸 smtp-tls-checker – check an email domain for SMTP TLS support.  🔸 MX Toolbox – all of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.  🔸 Secure Email – complete email test tools…

Messengers/IRC Clients   🔸 Irssi – is a free open source terminal based IRC client.  🔸 WeeChat – is an extremely extensible and lightweight IRC client. Messengers/IRC Clients   🔸 HexChat – is an IRC client based on XChat.  🔸 Pidgin –…

  🔸 usql – universal command-line interface for SQL databases.  🔸 pgcli – postgres CLI with autocompletion and syntax highlighting.  🔸 mycli – terminal client for MySQL with autocompletion and syntax highlighting.  🔸 litecli – SQLite CLI with autocompletion and syntax highlighting.  🔸 OSQuery –…

 🔸 angle-grinder – slice and dice log files on the command line.  🔸 lnav – log file navigator with search and automatic refresh.  🔸 GoAccess – real-time web log analyzer and interactive viewer that runs in a terminal.  🔸 ngxtop –…

  🔸 strace – diagnostic, debugging and instructional userspace utility for Linux.  🔸 DTrace – is a performance analysis and troubleshooting tool.  🔸 ltrace – is a library call tracer, used to trace calls made by programs to library…

🔸 ossec – actively monitoring all aspects of system activity with file integrity monitoring.  🔸 auditd – provides a way to track security-relevant information on your system.  🔸 Tiger – is a security tool that can be use…

Network   🔸 PuTTY – is an SSH and telnet client, developed originally by Simon Tatham.  🔸 Mosh – is a SSH wrapper designed to keep a SSH session alive over a volatile connection.  🔸 Eternal Terminal – enables…

 🔸 vi – is one of the most common text editors on Unix.  🔸 vim – is a highly configurable text editor.  🔸 emacs – is an extensible, customizable, free/libre text editor, and more.  🔸 micro – is a modern and…

 Shells   🔸 GNU Bash – is an sh-compatible shell that incorporates useful features from the Korn shell and C shell.  🔸 Zsh – is a shell designed for interactive use, although it is also a…

Ceph Explain what is Ceph True or False? Ceph favor consistency and correctness over performances Which services or types of storage Ceph supports? What is RADOS? Describe RADOS software components…

Big Data Explain what is exactly Big Data What is DataOps? How is it related to DevOps? What is Data Architecture? Explain the different formats of data What is a…

General What is a server? Define or Explain what is an API Tell me about interesting bugs you’ve found and also fixed What is a Debuggger and how it works?…

DNS What is DNS? What is it used for? How DNS works? Explain the resolution sequence of: www.site.com What types of DNS records are there? What is a A record?…

Elastic What is the Elastic Stack? Explain what is Elasticsearch What is Logstash? Explain what beats are What is Kibana? Describe what happens from the moment an app logged some…

Puppet What is Puppet? How does it works? Explain Puppet architecture Can you compare Puppet to other configuration management tools? Why did you chose to use Puppet? Explain the following:…

Security What is DevSecOps? What its core principals? What security techniques are you familiar with? (or what security techniques have you used in the past?) What the “Zero Trust” concept…

OpenStack What components/projects of OpenStack are you familiar with? Can you tell me what each of the following services/projects is responsible for?: Nova Neutron Cinder Glance Keystone Identify the service/project…

GCP Explain GCP’s architecture What are the main components and services of GCP? What GCP management tools are you familiar with? Tell me what do you know about GCP networking…

Azure Explain Azure’s architecture Explain availability sets and availability zones What is Azure Policy? What is the Azure Resource Manager? Can you describe the format for ARM templates? Explain Azure…

What is OpenShift? How OpenShift is related to Kubernetes? True or False? OpenShift is a IaaS (infrastructure as a service) solution What would be the best way to run and…

What are the advantages of MongoDB? Or in other words, why choosing MongoDB and not other implementation of NoSQL? What is the difference between SQL and NoSQL? In what scenarios…

How do you know if a certain directory is a git repository? How to check if a file is tracked and if not, then track it? What is the difference…

What is Prometheus? What are some of Prometheus’s main features? Describe Prometheus architecture and components Can you compare Prometheus to other solutions like InfluxDB for example? What is an Alert?…

Explain monitoring. What is it? What its goal? What is wrong with the old approach of watching for a specific value and trigger an email/phone alert while value is exceeded?…