i think i install from
debian-11.0.0-amd64-netinst.iso
but it's really installed from MATE live CD??
USB installer stick isn't properly prepared??
when i copy *-netinst.iso to /dev/sdb, it's done very very quickly
usually i can set up network with ifup after installation from *-netinst.iso
but some network manager in MATE might cause trouble when i run ifup?