How to update NTP to sync clock on Linux
If you need to sync the clock on Linux using the central NTP clock service, you can do the following:
sudo service ntp stop
sudo ntpd -gq
sudo service …Technical Articles
In-depth guides, insights, and best practices for modern software engineering
Data Partitioning Strategies for Distributed Systems
Master data partitioning techniques including sharding.
Understanding Data Partitioning
Data partitioning (also known as sharding) is the process of …
Read Article →Distributed Consensus Algorithms: Building Fault-Tolerant Systems
Master the algorithms that enable distributed systems to agree on shared state despite failures and network partitions.
The Consensus Problem
Before …
Read Article →How to Find IP Address Ranges used by Amazon S3
You can query the ip-ranges Amazon AWS URL, and parse the results through jq as follows:
Generic S3 IP Ranges
Query:
curl -s …How to Find the nth Reverse Number in Java
The challenge
Reverse Number is a number which is the same when reversed.
For example, the first 20 Reverse Numbers are:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, …How to Find the Sum of Intervals in Java
The challenge
Write a function called sumIntervals/sum_intervals() that accepts an array of intervals, and returns the sum of all the interval …
How to Find the Stray Number in Python
The challenge
You are given an odd-length array of integers, in which all of them are the same, except for one single number.
Complete the method …
Read Article →How to Find the EDID UUID of External Mac Monitors
You can issue the following command on an Apple Mac’s terminal to show the EDID UUID (unique serial number) of all attached external monitors: …
[Solved] jsii.errors.JSIIError: docker exited with status 1
If you get the following error while running AWS CDK:
raise JSIIError(resp.error) from JavaScriptError(resp.stack)
jsii.errors.JSIIError: docker …How to Filter a Number in C
The challenge
The number has been mixed up with the text. Your goal is to retrieve the number from the text, can you return the number back to its …
Read Article →How to Take a Ten Minute Walk in C
The challenge
You live in the city of Cartesia where all roads are laid out in a perfect grid. You arrived ten minutes too early to an appointment, so …
Read Article →How to Count Stats of a String in C
The challenge
You will be given a string and your task will be to return a list of ints detailing the count of uppercase letters, lowercase, numbers …
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