Improved Secure Shell session cleanup. It delays shutdown until all sessions are closed.

ssh-fix-reboot.service

[Unit]
Description=Secure Shell session cleanup V2
Wants=network-online.target
After=network.target network-online.target hostapd.service

[Service]
SyslogIdentifier=ssh-fix-reboot
RemainAfterExit=yes
Type=oneshot
TimeoutSec=10
ExecStart=/bin/true
ExecStop=bash -c "while [[ $found != F ]]; do found=F ;\
  for pid in $(pgrep -w -f 'sshd: \\S.*@pts/[0-9]+'); do found=T ;\
    echo 'Found sshd '$pid'; sending SIGTERM'; kill $pid || true ;\
  done ;\
  sleep 0.1 ;\
done ; exit 0"

[Install]
WantedBy=multi-user.target