All utilities work in terminal mode.
nmon – utility with GUI interface for monitoring CPU, memory, disk i/o and other attributes
hdparm -t -T /dev/sda1 – disk performance
stat -f / – number of used/free blocks/inodes
iostat -m -x sda 2 6 – watch load of specified disk (sysstat package)
vmstat -S M 2 50 – watch resource statistics/consumption
free -m (cache column – memory occupied by FS cache)
cat /proc/meminfo – information about RAM
cat /proc/cpuinfo – information about CPU
cat /proc/interrupts – who generates more interrupts
cat /proc/net/dev – transferred via interface in bytes
cat /proc/sys/fs/file-max – max allowed number of open files (sysctl -w fs.file-max=”16384″)
cat /proc/sys/fs/file-nr
nload – graphical traffic monitoring
bmon – graphical monitoring of interface load
iftop – graphical monitoring of interface load
tcptrack – graphical monitoring of interface load
fdisk -l – information about disks and partitions
top, 1 – load distribution across cores
netstat -s # network statistics. For example, netstat -s |grep establish current number of established connections
ethtool eth0 # information about operating modes supported by network card, current modes and parameters
sensors – shows CPU temperature (lm-sensors package must be installed)
hddtemp /dev/sda – shows hard drive temperature
acpi -v – shows temperature and additional info about coolers, etc. (acpi package must be installed)
setpci -s 00:02.0 F4.B=20 — Adjust backlight brightness.
