Linux: How to make your scripts re-read their configuration while running
Assume the following scenario, you have create a script that processes files.. your script is half way processing 1.000.000 files.. but you……
$ grep -rn "#Linux" ./posts
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……
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……
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……
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……
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……
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……
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……
pssh tricks to accept a group of hosts as a pattern and execute a local script remotely
pssh is a tool that allows to run commands in parallel, I love this tool since it is an alternative to Ansible for ad-hoc commands where……
Linux: xargs with multiple parameters
xargs is an awesome command, that can be used to pass input from stdin as parameters to other commands, also xargs can do other tricks like……