curl: keep a local copy up to date with -fsSLR -z
One curl line that downloads a file only when the server has a newer one, and why -f, -R and friends are there.
cat curl-keep-a-local-copy-up-to-date.md →$ ls -lh ./posts
// also on this box: ./practice, ./tools and ./games
Finding Empty Directories in Linux with One Command
In Linux systems, empty directories often accumulate over time — leftovers from removed applications, failed builds, or cleanup scripts…
cat finding-empty-directories-in-linux-with-one-command.md →
Copy a Directory Structure, Transfer Nothing!
There’s a moment every Linux user hits sooner or later.
cat copy-a-directory-structure-transfer-nothing.md →
The Fastest Way to Back Up a File in Bash (You’re Probably Not Using It)
When working in the terminal, backing up a file before editing it is a habit that saves time, nerves, and sometimes entire systems. There’s…
cat the-fastest-way-to-back-up-a-file-in-bash-youre-probably-not-using-it.md →
Mistakenly entered a command in terminal in Greek? Auto switch keyboard
If you often type commands in Greek and English, you might have noticed a common annoyance: typing Greek letters by mistake in the…
cat mistakenly-entered-a-command-in-terminal-in-greek-auto-switch-keyboard.md →
How to Send and Receive Data with RabbitMQ Named Queues in Python
RabbitMQ is a lightweight message broker that connects independent services through reliable message passing. It’s widely used in…
cat how-to-send-and-receive-data-with-rabbitmq-named-queues-in-python.md →
How to use grep to search text in docx files
Assume the following problem, you have myriad of word files and you want to search inside files for a specific keyword and opening each…
cat how-to-use-grep-to-search-text-in-docx-files.md →
Stop Intruders in Their Tracks: Get an Email Every Time Someone Logs In via SSH
Ever wondered who’s logging into your Linux box? Whether it’s a critical production server or a personal VPS, it’s smart to get notified…
cat stop-intruders-in-their-tracks-get-an-email-every-time-someone-logs-in-via-ssh.md →
Stop Guessing! The Web API That Verifies and Confirms If an Email Address Exists and Is Deliverable
One common challenge when using emails to communicate with clients is not just confirming that an email address is valid, but ensuring that…
cat stop-guessing-the-web-api-that-verifies-and-confirms-if-an-email-address-exists-and-is-deliverable.md →
Stalin Sort: The Sorting Algorithm That Purges Dissent
In the glorious world of computer science, we have many elegant ways to sort data — quicksort, mergesort, heapsort. They compare, they…
cat stalin-sort-the-sorting-algorithm-that-purges-dissent.md →