Command cheat sheet

you@laptop ~ % ssh root@YOUR.SERVER.IPyou@laptop ~ % ssh -p 222 root@YOUR.SERVER.IPyou@laptop ~ % ssh-keygen -R YOUR.SERVER.IP

root@rescue ~ # installimageroot@rescue ~ # lsblkroot@rescue ~ # cat /proc/mdstatroot@rescue ~ # mount /dev/md2 /mntroot@rescue ~ # mount /dev/mapper/vg0-root /mntroot@rescue ~ # chroot-prepare /mntroot@rescue ~ # chroot /mntroot@rescue ~ # passwdroot@rescue ~ # mdadm --stop /dev/md*root@rescue ~ # wipefs -fa /dev/sd*root@rescue ~ # wipefs -fa /dev/nvme*n1root@rescue ~ # reboot

root@server ~ # lsblk -o NAME,SIZE,TYPE,FSTYPE,MOUNTPOINT,UUIDroot@server ~ # lsblk -froot@server ~ # cat /proc/mdstatroot@server ~ # mdadm --detail /dev/md2root@server ~ # pvs; vgs; lvsroot@server ~ # parted -lroot@server ~ # blkidroot@server ~ # findmnt

root@server ~ # parted /dev/sda printroot@server ~ # fdisk -lroot@server ~ # lvextend -r -L +20G /dev/vg0/rootroot@server ~ # lvextend -r -l +100%FREE /dev/vg0/var

root@server ~ # hostnamectlroot@server ~ # lscpuroot@server ~ # nprocroot@server ~ # free -hroot@server ~ # dmidecode -t memory | grep Sizeroot@server ~ # lsblk -d -o NAME,SIZE,MODEL,ROTA,TRANroot@server ~ # smartctl -a /dev/nvme0n1root@server ~ # lspci | grep -i -E 'raid|nvme|ethernet'root@server ~ # ip -br aroot@server ~ # ip r

root@server ~ # df -hTroot@server ~ # df -iroot@server ~ # du -h --max-depth=1 / 2>/dev/null | sort -hroot@server ~ # ncdu /root@server ~ # free -hroot@server ~ # htoproot@server ~ # ps aux --sort=-%mem | headroot@server ~ # iostat -xz 1 5root@server ~ # journalctl --disk-usage

root@server ~ # ss -tulpnroot@server ~ # ufw status verboseroot@server ~ # ufw allow OpenSSHroot@server ~ # iptables -L -n -vroot@server ~ # iptables -t nat -L -n -vroot@server ~ # nft list ruleset

root@server ~ # passwdroot@server ~ # apt updateroot@server ~ # apt upgrade -yroot@server ~ # apt install -y sudo vim htop tmux curl ca-certificatesroot@server ~ # timedatectl