Fun Shell Scripts

failed.sh

#!/bin/sh
# Who is trying to access your server without permission?

sudo journalctl -u sshd \
| awk '/Failed password for/ {print $11}' \
| while read address; do whois "$address" \
| grep -m 1 -i "Country: " \
| sed "s/[Cc]ountry:/$address/"; done \
| awk '{print $2 " --> " $1}' \
| uniq -c \
| sort -r

snow.sh

for ((I=0;J=--I;))do clear;for ((D=$LINES;S=++J**3%$COLUMNS,--D;))do printf "%*s. \n" $S;done;sleep 0.5;done