gnuplot (❤️) one-liner to look for any weird increases in connection attempts due to regreSSHion: journalctl -S 2024-04-01 -u sshd -g "Connection closed" -o short-unix | cut -f 1 -d " " | gnuplot -p -e 'set terminal png size 960,720 small; set xdata time; set format x "%b %d"; binwidth = 60*60*24; set boxwidth binwidth; bin(x,width) = width*floor(x/width); set xtics binwidth rotate out; plot "-" using (bin($1, binwidth)):(1.0) smooth frequency with boxes title "login attempts"'