How can I overcome this problem? Thks for help.
autoreconf: not found".
sudo apt-get install autoconfsudo apt-get install libtool
More generally I wonder why you see these missing tool issues (there may be more to come). But I can only guess......
I have no idea about the instructions you are following, perhaps the issue is related to the virtual env?
Or perhaps the OS is Ubuntu SERVER not Ubuntu DESKTOP? Servers dont by default have the build tools.
If build tools are not on the system, this get most (all?) of them (and lots you probably won't need):
sudo apt-get install build-essential