- tail -f
- t
- systemctl --failed
- journalctl https://wiki.ubuntuusers.de/systemd/journalctl/
- colortail https://manpages.debian.org/bullseye/colortail/colortail.1.en.html
- multitail https://www.vanheusden.com/multitail/
- awk '{print $9}' /var/log/nginx/access.log | sort | uniq -c | sort -rn