gstat(8) - prints nice output of currently used filesystems/partitions [
gstat ]
netstat(8) - great tool for checking network deamons listening ports, number fo packets and buffers [
netstat -ib | netstat -Lan | netstat -m]
diskinfo(8) - get info about disks, also benchmark them in
hdparm(8) style [
diskinfo | diskinfo -c ad0 | diskinfo -t ad0 ]
iostat(8) - displays current disks usage, reads per second, transactions per second and so [
iostat 1 | iostat -x 5 ]