Key concepts from Eliyahu Goldratt, Ilan Eshkoli, and Joe Brown Lear's bestseller All companies face various factors that hinder their success and optimal performance. According to the “Theory of Constraints,” these factors can serve as both tools for improving a project's efficiency and barriers to its progress. In their book I Knew It All Along!, authors…
Keep Reading →
Voltaire said: if God did not exist, it would be necessary to invent him. The disputes of ancient philosophers were always peaceful, while the disputes of theologians were often bloody and always turbulent. Voltaire compared the universe to a clock, pointing to the complexity and precision of its design, which, according to the philosopher, indicates the…
Keep Reading →
The separation of powers, proposed by Montesquieu in his famous treatise The Spirit of the Laws, is considered one of the cornerstones of modern democracy. The essence of this theory lies in dividing state functions into three branches: legislative, executive, and judicial — to prevent the concentration of…
Keep Reading →
According to Leibniz, the presence of evil in the world is permitted as a necessary condition for achieving a greater good, such as free will or the development of virtue. The concept of the best of all possible worlds became one of the most well-known and simultaneously controversial aspects of Leibniz's philosophy, drawing criticism…
Keep Reading →
The key idea of the transcendent is that it goes beyond our understanding. Pantheism can be seen as a compromise between theism and atheism. Pantheists see divinity in the natural laws and everything that exists, hence the perception of the world as an expression of divine essence. The wisdom of non-action is sometimes much harder to attain than the obsessive desire to…
Keep Reading →
A skeptic sooner or later proves to be right, because by doubting everything, they never accept anything on faith. This makes them truly intellectually invulnerable. In a world where nothing is absolutely certain, skeptics always win. Simply because they do not play by obvious rules, as they are not convinced those rules are indeed obvious or worth following. It is especially…
Keep Reading →
Seneca taught that it is important not only to face but also to overcome difficulties. He spoke extensively about the importance of control and self-discipline, asserting that passions and desires can lead to unhappiness, and true happiness is achieved through rational self-restraint and understanding of one's true needs. Seneca saw death not as an end but…
Keep Reading →
There is no greater crime than making the unfree believe they are free, just as there is no greater crime than convincing the free that they are not. Jean-Jacques Rousseau, in his work "The Social Contract," asserts that man is born free, and this position is foundational in his reflections. Research comparing stress levels among ancient hunter-gatherers…
Keep Reading →
All other sages, except the Stoics, address people much like household physicians-slaves to their masters: their words are soft and flattering, and they treat not with the best and fastest remedy, but with the one to which the patient will agree. The Stoics approach the matter manfully and do not care whether the path they point out seems…
Keep Reading →
Leaders see their followers as partners, not just order executors. Tyranny, on the other hand, stands on the opposite pole, with tyrants acting through coercion and fear, striving for absolute power and subjugation. A tyrant sees people merely as tools to achieve their often ambitious and selfish goals. Ideally, a leader-state is based on principles of…
Keep Reading →
Despite the importance of logic and knowledge, sometimes simple and sincere faith has greater power, especially when it comes to questions beyond human understanding. Blaise Pascal proposed considering faith through the lens of a wager. He based this on the assumption that human existence is inevitably tied to a bet between believing in God and not believing…
Keep Reading →
The bitter truth is that human life is full of paradoxes and limitations, which make us futilely search for meanings, overcome difficulties, and adapt to changes. A person has the ability for self-analysis or reflection, which goes beyond purely instinctive behavior. It is the ego that makes one unique, but at the same time vulnerable. Awareness of one's own…
Keep Reading →
The seizure of power and power for the sake of power is a rapidly growing cancer that will start to protect itself to the last citizen. Democracy may serve as a screen, but in reality, power can remain with the same people. Power that places itself above all is ready to make human sacrifices. Machiavelli does not so much advocate the abuse of power as he states…
Keep Reading →
Money, essentially, is a system of trust and agreement among people. It functions only because society collectively agrees to assign value to it. Constant preoccupation with money can lead to stress, anxiety, and a sense of dissatisfaction when individuals measure their happiness solely through financial metrics. Attitudes toward money reveal our internal values and…
Keep Reading →
Montaigne's idea that self-awareness is the key to understanding the world has its extremely grounded realism and relevance. Montaigne claims that knowing one's own nature, one's thoughts and feelings allows a deeper and more accurate understanding of the surrounding world and relationships between people. First, self-understanding helps to realize one's…
Keep Reading →
Everything that happens in nature occurs according to the will of God. The collapse of nature is a natural process, determined by the desire of God. We cannot replicate phenomena observed in nature, such as mold or snowflakes. Did God create each of them, or did God create that which generates them? We lack sufficient knowledge to understand nature. When…
Keep Reading →
Chapter one. The beginning of a dialogue with oneself. Thanks to an experiment on the streets of New York, we know that our inner voice switches from our immediate problems to more serious ones. Self-talk is unique, just like people's lives. Most often, we are talking about the processing of negative information that arises as a result of associations, and thoughts are chained…
Keep Reading →
management Explore and identify block devices Check block device "blkid", shows mount point, uuid, type, label, partition id. IO information "blkid -i /dev/sdc1". Show all devices"lsblk". Create and modify partitions Tools for working with partitions: parted fdisk gparted cfdisk Create modify and mount filesystem Filesystems: They keep track of data on the disk Linux support many natively…
Keep Reading →
What is virtualization? Full virtualization: Hardware virtual machine (HVM) Hypervisor creates emulated device (translate data to real one) Some CPUs support direct access by VMs Quick emulator (QEMU) + Kernel-based virtual machine (KVM) Paravirtualization: Guest OS must be modified to be aware it’s virtualized Guest can communicate directly with hardware Memory and processor are…
Keep Reading →
Service What you will need for emails to work Need to have static IP address Need to have domain with MX record (mail exchanger) Need firewall access Example of MX => "example.com 14400 IN MX example.com" Other A records - subdomains too help autoconfiguration DNS Records: To help delivery: TXT record - help Gmail delivery (SPF) Reverse zone - check s that sending server is valid Aside from…
Keep Reading →
configurations Run levels and targets 0 - power system off (poweroff.target) 1 - single user mode (rescue.trarget) 2 - Multi user mode (multi-user.target) 3 - Multi user mode (multi-user.target) 4 - Multi user mode (multi-user.target) 5 - Multi user graphics mode (graphical.target) 6 - Reboot system (reboot.target) Check current target "systemctl get-default". Check available targets…
Keep Reading →
Configuration files are in "/etc/network/interfaces"
To test networking possible to use "nmcli" Dynamic IP vs Static Dynamic address DHCP server assign an address Static address - unchanging address set by administrator Working with network service systemctl status servicename systemctl start | stop servicename Finding network connection information Find all adapters "ip a". Predictable…
Keep Reading →
and groups management Users are stored in /etc/passwd file in next format: Username Has password in /etc/shadow uid = user id gid = group id Friendly username, might include email or phone Default home directory Default shell or no login Encrypted password are stored in /etc/shadow file. Groups are listed in /etc/group. Create user accounts Defaults for creating user account are located in…
Keep Reading →
commands Linux File System explored Working with file System Creating link Finding files Outputs and redirects Standard input(stdin) 0 Standard output(stdout) 1 Standard error(stderr) 2 Redirect output: ls 1> output.txt or ls 1> output.txt Redirect error ls 2> output.txt Append to file: echo 'some text' >> file.txt Comparing files Archiving Modifying text awk - extract text from a file…
Keep Reading →
Introduction We have 3 options for behavior in a scandal: run away, scandalize in return, negotiate. Using the first two makes us feel bad because we either lose the argument or stoop to the level of the person trying to argue with us. It is also sometimes very difficult to come to an agreement, while you are looking for constructive arguments, the opponent reminds you…
Keep Reading →
Introduction Trying to stop feeling emotions just doesn't work. Setting yourself up to ignore your own feelings leads to relationship problems and a feeling of losing control over your life. Secondary emotions are your reactions to primary emotions. Sometimes the reaction can be much stronger than the emotion itself. Learn to recognize your emotions in time…
Keep Reading →
Introduction The amount of information is increasing every day. The ability to correctly select the necessary information becomes critically important. We make the mistake of thinking that by collecting as much information as possible, we will be able to make sense of the world. However, an excess of information can lead to a lack of…
Keep Reading →
Preface Intelligence is networking Networking is the creation of external social connections to achieve success in life and career. A scout is a professional networker who is engaged in finding connections and building relationships. Networking takes up most of his time every day. Chapter one. Networking tools Tasks to be solved…
Keep Reading →
Part 1: Introduction to the seven skills of highly effective couples Every family is organised in its own way. Relationships can be developed without repeating the patterns of your parents. It is important to adopt only the best practices. You should be guided by the interests of children and support your partner. Appreciate differences…
Keep Reading →
The importance of priorities and focus To be successful, it is important to understand that not everything is of equal importance. You need to focus on finding the shortest path between what you are currently doing and what you want to achieve. Setting a high goal and prioritising will help you achieve your goals. Often, one decision can decide the fate of a company…
Keep Reading →
CI/CD AWS Code Commit Version control Enabled by using control systems such as GIT Git repo can be synchronized between computers Offers private repositories Fully managed and highly available Code only in AWS cloud account Security Integrated with Jenkins, CodeBuild and others AWS Code Commit security SSH keys HTTPS IAM policies Encryption Encryption in transit Cross-account access AWS…
Keep Reading →
and Audit Monitoring CloudWathcMetrics: Collect metrics CloudWatchLogs: Collect, monitor and analyze logs CloudWatchEvents: Send notifications CloudWatchAlarms: React in real-tome to metrics and events AWS X Ray: troubleshooting performance and errors Tracing of micro services AWS CloudTrail: Internal monitoring of API calls Audit changes to AWS resources by users CloudWatch metrics EC…
Keep Reading →
ECS EC2 Launch Type: Launch docker containers on aws = launch ecs tasks on ECS cluster EC2 Launch type: you must provision and maintain the infra Each EC2 instance must run ECS Agent to register in the ECS Cluster Fargate: You do not provision EC2 instances It’s all severless You just create task definition AWS just runs ECS Tasks for you based on CPU/RAM we need IAM Roles for ECS: EC…
Keep Reading →
VPC VPC, Subnets, IGW and NAT VPC private network to deploy your resources (regional resource) Subnets allow you to partition your network inside VPC (AZ resource) A public subnet is a subnet that is accessible from the internet A private subnet is a subnet that is not accessible from the internet To define access to the internet and between subnet, we use Route Tables Internet Gateways…
Keep Reading →
Route 53 Highly available, scalable, fully managed and Authoritative DNS Route 53 is also a Domain registrar Ability to check the health of your resources The only AWS service which provide 100% availability SLA Why route 53? 53 is a reference to the traditional DNS port Each record of route 53 has: Domain/subdomain name Record type Value Routing policy TTL Route 53 Record types A - maps a…
Keep Reading →
, Aurora and ElastiCache Amazon RDS Possible to use next engines: Postgres MySQL MariaDB Oracle Microsoft SQL Server RDS proses: Automated provisioning OS patching Continuous back-ups (1 -35 days) Monitoring dashboard Read replicas Multi AZ for Disaster Recovery Maintenance windows for upgrades Scaling Storage backed by EBS Free storage increase using max storage thresholds No SSH access RDS…
Keep Reading →
, Users, Groups and Policies IAM = Identity and access management. Root account created by default should not be used or shared. Users are people of your organizations, they can be grouped. Some users could not have a group, some users could belong to multiple groups. Users and groups could get IAM policies IAM policy Consists of: IAM - Password policy You can enforce users to have: Min pass…
Keep Reading →
Chapter 1 You will have to delve deep into action to achieve the necessary result, but even this does not guarantee its attainment. We cannot always achieve what we desire, even if we long for it greatly. We suffer from insomnia, although we desperately want to fall asleep. Chapter 2 Thoughts on Jedi techniques need to be taken into account. The Monkey and the…
Keep Reading →
Chapter 1 All countries are divided into republics and states. States are divided into new and old. Chapter 2 It is harder to maintain power in new states because they are formed through the seizure of power. In old states, power is passed down from ancestors, which complicates its loss. Even a mediocre ruler manages this better, and in case of losing power, the…
Keep Reading →
Section 1. Choice Moore's Law predicts that the cost of transistors decreases, while their sizes decrease every year. The Saab modular approach involves placing parts as plugins on the main frame. Scrum Values: product is more important than documentation communication with the client is more important Section 2. How to Rethink Cheaply In Scrum, there are only…
Keep Reading →
Part 1. Falling in love occurs when each person finds the best available object on the market, considering their exchange value. There are two ways to enhance this value: success and beauty. Women choose beauty, while men opt for success. Beauty is always defined by society. True understanding is the intuition born through acquiring theoretical knowledge and practice…
Keep Reading →
The most challenging thing is to acknowledge one's own fault not because it is criminal, but because it is humorous and disgraceful. Almost always, good but not always properly directed feelings compel children to take the first step in the wrong direction. I seek only pleasures, but money poisons everything. Food is not as flavorful without a companion to share it…
Keep Reading →
10 rules on how to tame a tiger Act now time is limited Rewrite the code of habit and keep changing it Every day, move in the direction you want to go. Become the master, and your head Look for someone who can help you Don't Seek Safety in Being in the Majority Do something every day that scares you. Be aware and control your time to…
Keep Reading →
Marcus Aurelius lived during the most challenging times of the empire, dedicating his life to the defense and prosperity of the state. Highly valuing principles of dignity, he refrained from killing enemies and provided the opportunity to choose exile for those who attempted against his rule. Marcus Aurelius distributed his wealth to the poor and contributed to the…
Keep Reading →
