seems that sudo by default does neither carry over the existing env nor process a pam login ...
it works fine with "sudo -i"
ogra@styx:~$ sudo -i env|grep PATH PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin
vs
ogra@styx:~$ sudo env|grep PATH PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
seems that sudo by default does neither carry over the existing env nor process a pam login ...
it works fine with "sudo -i"
ogra@styx:~$ sudo -i env|grep PATH local/sbin: /usr/local/ bin:/usr/ sbin:/usr/ bin:/sbin: /bin:/snap/ bin
PATH=/usr/
vs
ogra@styx:~$ sudo env|grep PATH local/sbin: /usr/local/ bin:/usr/ sbin:/usr/ bin:/sbin: /bin
PATH=/usr/