Here, is looking for information about how to do something online, for example write how to configure a server, how to implement some function, etc., find, doing, everything works. And then after a year again would need the same thing, and already forgotten how to do it. Yes, you can dig in the old code, but sometimes a lot of files and I don't remember exactly where and in final version in that time were not included, and lies somewhere in the old copies and try to find. While in the Internet more on the move is not. Then of course understand, but take longer than it could be.
What you need: any program or service in which you can save the manuals. Not just links, because links sometimes die. And preferably not only the text, because, though not often, but sometimes you need with images. Ie I would like to keep a copy of the HTML. Well, you can of course just make the directory and the web browsers keep copies, but I wanted something more convenient, in some programs, which is a list with descriptions, and in fact the content.
Better if it is not a service, and the program (because services do not last forever), but the lack of anything better, and the service. If the program, make sure the cross-platform, because it is not always at the same computer. It is desirable that the database can be stored simultaneously on localhost and in the cloud, as, for example, in KeePass
I have tested:
MyTetra - in functionality fit of the drawbacks virgillassie interface and synchronization is made in the form of the row in which it is necessary to enter the command, i.e. in fact it externally and its not
CherryTree - in functionality suitable human interface, but does no synchronization
QOwnNotes - does not support inserting images in the text
Polar Bookshelf - great saves web pages as PDF and all the usual text notes no
Joplin does not support inserting images in the text
Tabsbook - it generally saves only the links, not the pages themselves
Zim Desktop Wiki is to paste images you can, but one at a time from the file system, just select all you need on the website and you cannot insert, not found in sync