Le 11/08/2018 à 13:42, Nicolas George a écrit : > Pétùr (2018-08-11): >> The new 'su' is useless for me because it cannot launch root program. > Maybe learn how to use $PATH? If I modify $PATH for the new "su", I basically re-implement the old behavior of "su". This is exactly what adding 'ALWAYS_SET_PATH yes' in /etc/login.defs does (and I did that). My question was not to modify new "su" but why old "su" is bad practice.