+ grub-editenv /mnt/grubenv set did_fai_check=os_true
+ # ref: https://www.freedesktop.org/wiki/Software/systemd/NetworkTarget/
+ deadline=$(( `date +%s` + NETWORK_TIMOUT_SECS ))
+ while ! systemctl status network-online.target && \
+ (( `date +%s` < deadline )); do
+ sleep 1
+ done