System Info

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How to find different basic information about your Unix|Linux system.

Contents

General

System resource usage

  • top
  • ps
  • ps aux
  • vmstat (vmstat 5) update stats every 5 seconds, similar to top

System info

  • uname
  • uname -a
  • cat /proc/version
  • dmidecode

Memory

  • cat /proc/meminfo
  • free
  • top -m io

Disks

Show partition information

  • cat /proc/partitions
  • df -h
  • fdisk -l
  • parted -l
  • ls /sys/block/

Show disk usage

  • du
  • du -chd 1 . (freebsd)
  • du -ch --max-depth=1 . (linux)

Show disk space in (h)uman-readable format (i.e. in k and M not bytes), then only show me the directories that contain at least one MB of data in them, sorted numerically, one page at a time. (Matt Cohen)

  • du -h | grep "[0-9]M" | sort | more


Network

  • netstat
  • sockstat

Not Yet Organized

  • iotop
  • ntop
  • iftop
  • htop
  • vmstat
  • iostat
  • dstat
  • mytop (MySQL)
  • server-status (Apache)
  • lsof
  • /proc/mdstat