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memory

lshw -short -C memory
cat /proc/meminfo

cpu

cat /proc/cpuinfo

usb

lsusb -t

gamborimbo

H/W path           Device      Class          Description
=========================================================
/0/0                           memory         1MiB BIOS
/0/1a                          memory         8GiB System Memory
/0/1a/0                        memory         4GiB SODIMM DDR3 Synchronous 1333 MHz (0.8 ns)
/0/1a/1                        memory         4GiB SODIMM DDR3 Synchronous 1333 MHz (0.8 ns)
/0/25/27                       memory         32KiB L1 cache
/0/25/28                       memory         256KiB L2 cache
/0/25/29                       memory         6MiB L3 cache
/0/26                          memory         32KiB L1 cache

Monitoring

CPU, MEM, … 

top
htop
glances

IO http://xmodulo.com/how-to-monitor-disk-io-in-linux.html 

iotop
atop

NET http://www.slashroot.in/find-network-traffic-and-bandwidth-usage-process-linux 

netstat
iftop