[Reboot to specific OS] Reboot the machine to a specific boot target (Grub entry) #linux #bash #grub #interactive

reboot-to.sh

#!/usr/bin/env bash
# Reboot the machine to a specific boot target (Grub entry).
# The boot target is interactivly selected with fzf.
#
# Simon Schürg

# Search for grub.cfg
GRUB_CFG=$(find /boot -name grub.cfg 2> /dev/null)

if [[ -z ${GRUB_CFG} ]]; then
  echo "No grub.cfg found under /boot. Try as root."
  exit 1
elif [[ ! -r ${GRUB_CFG} ]]; then
  echo "${GRUB_CFG} is not readable. Try as root."
  exit 1
fi

GRUB_MENUENTRY=$(awk -F\' '/menuentry / {print $2}' ${GRUB_CFG} | fzf)

# Set boot target for next boot
grub2-reboot "${GRUB_MENUENTRY}"

# Seconds to sleep before reboot
SLEEP=5
echo -ne "Rebooting to ${GRUB_MENUENTRY} in ${SLEEP} seconds "
for i in $(seq 1 ${SLEEP}); do
  echo -ne "."
  sleep 1
done

reboot