CPU

md5sum /dev/urandom - Single thread CPU test
stress –cpu 4 –timeout 300s - Multi threadCPU test
cat /dev/zero | bzip2 -c > /dev/null - CPU Stress Test

HDD

cat /dev/sda3 | pipebench -q > /dev/null - RAW Read Speed Test
dd bs=16k count=102400 oflag=direct if=/dev/zero of=test_data - Write Test
dd bs=16K count=102400 iflag=direct if=test_data of=/dev/null - Read Test

GPU
https://losst.ru/testirovanie-videokarty-v-linux mht
https://benchmark.unigine.com/superposition - Superposition