Am 13.02.2021 um 16:31 schrieb Reynaldo Senra: Well, in a newer Ubuntu version of course the gretl package is also newer. For example, the current LTS version should be "Focal Fossa"/20.04, and there you have 2019d. (https://launchpad.net/ubuntu/+source/gretl) But... ,,, if you really want the latest (which we totally understand, of course!), then there are instructions in Appendix B of the user guide. (under the help menu) Actually I think the beginning of that section is unnecessarily confusing and sounds more complicated than it is; maybe it should be rewritten. The important information to start with then follows on the next page, quoting: "The above steps can be much simplified on Linux systems that provide deb-based package managers, such as Debian and its derivatives (Ubuntu, Knoppix and other distributions). The command apt-get build-dep gretl will download..." OK, so in practice on Ubuntu you always need to type "sudo apt-get ...." to install stuff. (The same is true for "sudo make install" after the actual build; but not for "make" itself.) The next thing that should be mentioned in that Appendix is that for the build-dep stuff you need to have the src repos activated in Ubuntu's software sources. But Ubuntu has a graphical utility for that so you just have to click on a tick box for that. Let me try a quick summary: 1) activate the src repos in the sources for apt (one-time action only) 2) sudo apt build-dep gretl (also just one time) 3) <in my experience still need to install some more Texlive packages which aren't covered by build-dep...> 4) clone the gretl source code repo via git (the bleeding edge) 5) ./configure --enable-build-doc --enable-build-addons (the Appendix B doesn't mention how to configure the build to be outside the source tree, although Allin rightly insists that's the recommended way...) 6) make 7) make pdfdocs 8) sudo make install 9) sudo ldconfig Feel free to post the error message you're getting along the way. good luck sven