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Run a function in background and get its process ID Instead of creating another script that you call from your primary script you can simply declare a function (inside your primary script or inside another file that you include), and… Continue Reading →
$n Where n is a positive integer and takes values from 1 to a greater value not restricted. n correspond to the position of an argument givent to a script or to a function $? Exit status of the last… Continue Reading →
Ansible ssh key connection Refer to https://codetodevops.com/2022/05/21/public-key-authentication-on-linux-best-practices-a-more-secure-way-to-connect-to-your-hosts-without-login-and-password/ The advantages of an ssh key over a basic authentication are: no raw password (but you can encrypt passwords using ansible vault) one unique private key to connect to several nodes (but of… Continue Reading →
Note: for the whole article, I will work with a linux user called ansible on a host called also…ansible! 🙂 ssh-keygen When you use ssh-keygen you will generate a private and public key pair. And you’ll have to choose which… Continue Reading →
Note: The following commands are for RockyLinux, RedHat, CentOS, on other distros it will be almost the same. I’ve made the choice to connect to a user called ansible, and inside his home directory I’ve created a directory called ansible,… Continue Reading →
Install python 3.10.4 from source on Rocky Linux or CentOS The following commands are executed as a root user. Virtual Python environment You can install several virtual python environments on your Linux OS. It will allow you to deploy a… Continue Reading →
cmd version: The file is now 0 byte size, and occupies 0 byte on disk. powershell version: In this case, the properties of the file show us it’s now 2 bytes size then not completely empty. And the file uses… Continue Reading →
Firstly, it’s good to remember these following points: (Some history: historically linefeed (LF) was used to advance the paper by one line on printers and hardcopy terminals (teleprinters); carriage return (CR) returned the print head to the start of the… Continue Reading →
In the DevTool of your web browser you have this kind of message because you’ve been to the url https://mydomain.com (or a completely different domain like https://anotherdomain.com) that contains an HTML page which includes an iframe of https://othersite.mydomain.com This message… Continue Reading →
-Wait signifies wait for new logs and display it -Tail 10 signifies display the last 10 lines from <my_log_file>