Command cut berfungsi untuk memotong string dan berikut adalah beberapa tutorial
Menghapus string comma dari hasil output tail
file log
140.213.7.40, lip=51.79.129.55, TLS, session=<srEfkWiwrZiM1Qco> 140.213.7.40, lip=51.79.129.55, TLS, session=<srEfkWiwrZiM1Qco> 139.99.30.6, lip=51.79.129.55, session=<h6hSkWiwjqeLYx4G> 139.99.30.6, lip=51.79.129.55, session=<h6hSkWiwjqeLYx4G> 114.122.203.12, lip=51.79.129.55, TLS, session=<bsaqkWiwFthyessM>
dilakukan filter dengan cara
tail -n 200 /var/log/maillog | grep failed | awk -F"rip=" ' {print $2}' | cut -d, --output-delimiter ' ' -f 1,2
hasil output
125.161.136.199 lip=51.79.129.55 125.161.131.93 lip=51.79.129.55 125.161.131.93 lip=51.79.129.55 114.124.142.92 lip=51.79.129.55 36.88.112.185 lip=51.79.129.55