One of the things that usually cost the most when it comes to the * nix world is its commands. Learn all those commands, attributes and options it can be somewhat complex at times. In addition, infrequent commands must often be used, which is why they are somewhat unknown even to those who are already more veteran.
If you have problems with these commands, in addition to the fantastic Wikis of many projects, and all the tutorials that you can find on the net, as well as the man pages, you can also find other very helpful resources on the net. It is the case of explainshell.com, a site where you can enter any Linux command and it will return an explanation of its use, as can be seen in the featured image of this article.
As you can see, what I did was introduce an example command, which in this case was:
echo Hola LxA!
And by clicking on the Explain button, which shows, as you can see, are two boxes. One of them points to the program itself, in this case echo. And the expiation is shown, in this case it shows you that it is a command to display a line of text.
Then there is a second box that points to the text string what goes next. And in this case it is also explained that the text string will be displayed through the standard output, that is, it will be displayed on the screen.
And under all that, a link appears that points you to the man pages, in case you need more help. And, above, you can tap on Theme to switch to a white theme or a dark theme, if you prefer. You can also go to the site of GitHub or see information about the project.
Of course, you can try the commands you prefer, also, if you add command attributes or options, it also specifies them in another box. And if the option is not valid, I would mark it with a question mark, which is indicating that this option is not correct.
If you would like to start using this resource, you just have to go to this web page. You will see that the use is very simple, and it can help you on a day-to-day basis ...