Hi, Unless your Linux distribution is very permissive you should never access the /usr repo in write mode. The standard place to install your custom softwares is /opt [1].
[1] https://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard Vincent Le 16/03/2019 à 19:27, HG a écrit :
Hi, I have ubuntu 18.04 with sagemath-8.1, I use sagemath-8.6 (this one is call from its dir) and I compiled dev sage 8.7, i don't need 3 sage, i only want sage dev ans I wonder if I install it as a normal programm /usr after ./configure --prefix=/usr make and make install if it could work ? I have no risk on my pc if it's mess I just reinstall a fresh one. Henri
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