# Reboot Reminder In Arch Linux

Reboot is required when Linux kernel is updated. Ubuntu has a nice [MOTD](https://docs.vultr.com/working-with-the-ubuntu-message-of-the-day-motd-service) that reminds user to reboot the machine. There is a simple implementation for Arch Linux.

Append the following to end of `~/.bashrc`:

```bash
versionUpdated=$(vercmp $(pacman -Q linux | cut -d " " -f 2) $(uname -r))
if [ $versionUpdated -ne 0 ]; then
    HIGHLIGHT='\033[1;33m'
    NC='\033[0m' # No Color
    echo -e "${HIGHLIGHT}Linux version changed, reboot needed.${NC}"
fi
```

I am using `pacman -Q linux | cut -d " " -f 2` to extract installed kernel version. If you are using other distro, you will need to modify this part. `vercmp` is also Arch-specific command.

I am using non-zero (`-ne`) comparison, so it will display reminder message whenever there is changes in kernel version (both upgrade and downgrade). Font color is yellow, you can [change it to a different color](https://stackoverflow.com/a/5947802/58542).

Reference: [https://bbs.archlinux.org/viewtopic.php?id=173508](https://bbs.archlinux.org/viewtopic.php?id=173508)