How to troubleshoot crontab issues
Crontabs are super useful, you can schedule tasks to run recurrently at specific times or intervals, but there are common pitfalls that can…
cat how-to-troubleshoot-crontab-issues.md →$ ls -lh ./posts
// also on this box: ./practice, ./tools and ./games
We are creating UUIDs with 3 different languages, which is faster?
Creating UUID is an effortless task with modern languages, all of them have libraries to develop them straightforwardly, but do they differ…
cat we-are-creating-uuids-with-3-different-languages-which-is-faster.md →
sslscan: Audit the SSL\TLS configuration of your web server
sslscan is a command line tool that gathers information about the SSL/TLS configuration of your web services which allows you to identify…
cat sslscan-audit-the-ssl-tls-configuration-of-your-web-server.md →
How to hide a file inside another file
Assume the following scenario! you are a spy and you want to hide your files! Since you are an expert spy you know that just making your…
cat how-to-hide-a-file-inside-another-file.md →
Python: How to swap variables without using a temporary variable
I guess everybody who has studied programming had an example of how to swap variables, all those examples because they were intended for…
cat python-how-to-swap-variables-without-using-a-temporary-variable.md →
Linux: How to find files with specific extensions and scp them to another host
One very common task of Sysadmins / Devops is to transfer files from one server to another, the most common way is to use scp, a tool that…
cat linux-how-to-find-files-with-specific-extensions-and-scp-them-to-another-host.md →
Linux: how to find files in a directory and compress them
One of the most common operations as a sysadmin / devops engineer is to find files in a directory and compress them. Let's see some handy…
cat linux-how-to-find-files-in-a-directory-and-compress-them.md →
Linux: Make your scripts safe, don't run a script if an instance of the script is already run
Assume the following scenario, you have created a script that does log analysis and writes results in files, but the script in case of…
cat linux-make-your-scripts-safe-dont-run-a-script-if-an-instance-of-the-script-is-already-run.md →
All Pythons are beautiful but not every one of them is as fast
Everybody will assume that a newer software version will be always faster or at least fast as the previous, but is this always the case? In…
cat all-pythons-are-beautiful-but-not-every-one-of-them-is-as-fast.md →
How to exit vim and other important key bindings!
vim is almost everywhere available text editor, lack of mouse and GUI can scare new users, but don't worry you don't need to learn…
cat how-to-exit-vim-and-other-important-key-bindings.md →