Test HDD / SSD speed

List disks and its partitions

lsblk

sda                         8:0    0 119.2G  0 disk
├─sda1                      8:1    0     1G  0 part /boot/efi
├─sda2                      8:2    0     2G  0 part /boot
└─sda3                      8:3    0 116.2G  0 part
  └─ubuntu--vg-ubuntu--lv 253:0    0 116.2G  0 lvm  /

Use dd to check speed

# Where sda3 is the partition on the disk we want to test
sudo dd if=/dev/sda3 of=/tmp/test1.img bs=1G count=1 oflag=dsync && sudo rm /tmp/test1.img