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# screen -S buildworld Ctrl-a d # screen -S switch /dev/ttyS0 9600 Ctrl-a d # screen -list # screen -R buildworld # screen -d -r buildworld # screen -x switch Ctrl-a k
# cat ~user1/.screenrc
shell /bin/bash multiuser on acladd root
# usermod -s /usr/bin/screen user1 # screen -x user1/ # ls /var/run/screen/S-user1/
# screen /dev/tty.usbmodemfa2321 115200