linux.md

cheatsheet for linux

create a super fast ram disk

mkdir -p /mnt/ram
mount -t tmpfs tmpfs /mnt/ram -o size=8192M

show ports on which the system listens on

ss -tnl

detect new hard disk attached without rebooting

for host in /sys/class/scsi_host/*; do echo "- - -" | sudo tee $host/scan; ls /dev/sd* ; done

nslookup

nslookup -port=8053 ns1.lab-net.lan localhost