Fixed example.
.. -*- coding: utf-8; -*-
========================
OS resource statistics
========================
.. contents::
:local:
Process list
============
Linux
-----
View current user process::
$ ps
View all running process::
$ ps -e
View process commands::
$ ps -e -o pid,cmd
View parent process id of selected process::
$ ps -p $PID -o ppid=
Show processes with same substring in command::
$ pgrep -f $SUBSTR
$ pgrep -l -f $SUBSTR
$ pgrep -a -f $SUBSTR
View detail process info::
$ ps -f $PID
$ cat /proc/$PID/cmdline
$ cat /proc/$PID/environ
$ cat /proc/$PID/status
View process tree::
$ pstree
Kill process::
$ kill -s $SIG $PID
Kill processes with same name::
$ killall $NAME
Kill processes with same substring in command::
$ pkill -f $SUBSTR
View processes interactively::
$ htop
Use ``-w`` option for wide output. Use this option twice for unlimited width.
Run as another user::
$ su - $user
$ command
or::
$ sudo -u <user> -i <command>
FreeBSD.
--------
View current user process::
$ ps
View all running process::
$ ps -ax
View detail process info::
$ ps -j <id>
$ ps -l <id>
Windows.
--------
View all running process::
cmd> TaskList
Process Name PID Session Name #Session Memory
========================= ====== ================ ======== ============
System Idle Process 0 Console 0 28 KB
System 4 Console 0 236 KB
smss.exe 592 Console 0 432 KB
csrss.exe 656 Console 0 4 404 KB
winlogon.exe 680 Console 0 2 792 KB
services.exe 724 Console 0 3 260 KB
View processes interactively::
cmd> taskmgr
Kill process (TODO with which Windows version come?)::
cmd> tskill {<pid>|<name>}
cmd> taskkill /IM notepad.exe
cmd> taskkill /PID 827
Run as another user::
$ runas /u: TODO XXX
CPU consumption
===============
Linux interactive
-----------------
::
$ top
$ dstat
$ nmon
Try press 's' (strace), 'l' (lsof), 'F5' (tree view) in::
$ htop
http://htop.sourceforge.net/
Home page.
Linux static
------------
Number of cores::
$ nproc
Process affinity::
$ taskset -p $PID
::
$ ps -eo %cpu,pid,cmd --sort=%cpu
$ pidstat
$ mpstat
CPU context switches::
$ pidstat -w
FreeBSD interactive
-------------------
::
$ top
Windows
-------
::
cmd> taskmgr
Solaris
-------
Interactive::
$ perfmeter
Static::
$ prstat
$ mpstat <num> <seconds>
http://developers.sun.com/solaris/articles/prstat.html
Topping top in Solaris 8 with prstat.
Memory consumption
==================
Linux interactive
-----------------
::
$ top
$ dstat
$ nmon
Linux static
------------
Vitual and resident memory size per process::
$ ps -eo vsz,rsz,pid,cmd --sort=vsz --width 3000
Swap size and usage::
$ free -t
total used free shared buffers cached
Mem: 1028732 91928 936804 0 5396 34936
-/+ buffers/cache: 51596 977136
Swap: 1048568 0 1048568
Total: 2077300 91928 1985372
$ vmstat
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 936804 5460 34936 0 0 21 5 363 29 0 0 99 0
System memory distribution::
$ cat /proc/meminfo
$ cat /proc/iomem
$ cat /proc/pagetypeinfo
$ cat /proc/buddyinfo
$ sudo cat /proc/slabinfo
$ sudo slabtop
Memory limits inside container::
cat /sys/fs/cgroup/memory/memory.limit_in_bytes
cat /sys/fs/cgroup/memory/memory.max_usage_in_bytes
Shared memory segments::
$ ipcs -m -p
Process memory map::
$ pmap -x $PID
$ pmap -XX $PID
FreeBSD interactive.
--------------------
::
$ top
FreeBSD static.
---------------
Swap size::
$ swapinfo
$ pstat -s
Swap usage::
$ vmstat
Solaris.
--------
::
$ sar -g
$ vmstat
$ prstat -s size
$ prstat -a
Windows.
--------
::
cmd> taskmgr
and add colums TODO.
Storage IO consumption.
=======================
::
$ iostat
Power usage.
============
::
$ sudo powertop
Network activity.
=================
::
$ ping $IP
$ traceroute $IP
$ mtr $IP
$ sudo bmon
Network IO top::
$ sudo iftop
$ sudo iftop -i wlan0
Various network stats::
$ sudo iptraf
Use ``Shift + S`` to show source port numbers, ``Shift + S`` to show destination
port numbers in ``iftop``.
How many packets come through interface (size/type/source/destination)::
$ sudo apt-get install netdiag
$ sudo trafshow
How many packets come through interface, how many errors, MTU size::
$ netstat -i
Detailed information about interface::
$ netstat -ie
Routing table::
$ ip route show
$ netstat -r
Network status.
===============
Linux::
$ ip link show
$ sudo ethtool eth0
Windows, localo IP addresses::
$ ipconfig
Windows, local MAC addresses::
$ getmac
$ ipconfig /all
Open ports.
===========
::
$ nmap $IP
Here ``-z`` means to scan for port range by waiting no longer then ``-w``::
$ nc -V -w 2 -z $IP 21-23
Open ports on current host::
$ netstat -i
$ netstat -i -t
$ netstat -i -n
Opened file by process.
=======================
Linux.
------
::
$ lsof -p $PID
$ lsof -c $CMD
FreeBSD.
--------
::
$ fstat -p <pid>
Windows interactive.
--------------------
procexp.exe from Sysinternals.
Windows static.
---------------
handle.exe from Sysinternals::
cmd> handle -p 1265
C: File (RW-) C:\Program Files\Common Files\GTK\2.0\bin
288: Section \BaseNamedObjects\mmGlobalPnpInfo
Opened file by user.
====================
FreeBSD.
--------
::
$ fstat -u <user>
Processes that open path
========================
::
$ lsof $FILE
$ lsof +D $DIR
Opened network connection by process.
=====================================
Linux.
------
``[46]`` - IPV4 or IPV6, ``protocol`` - tcp, udp::
$ lsof -i[46][protocol][@{hostname|hostaddr}][:{service|port}]
$ lsof -i :80
::
$ netstat -p -l | grep $PORT
$ netstat -p -l -t | grep $PORT
$ netstat -p -l -u | grep $PORT
::
$ fuser $port/tcp
To kill precess by port number::
$ fuser -k $port/tcp # with SIGKILL
$ fuser -k -15 $port/tcp # with SIGTERM
$ fuser -k -TERM $port/tcp # with SIGTERM
FreeBSD.
--------
TODO
Windows.
--------
'-o' show PID, '-a' show all connection::
cmd> netstat -o -a
Type Local addr Remote addr State PID
TCP user:1154 localhost:1153 ESTABLISHED 1512
TCP user:5152 localhost:1052 CLOSE_WAIT 1524
TCP user:1036 services.int:5222 ESTABLISHED 1188
Locked file by process.
=======================
Linux.
------
::
$ lsof <file>
FreeBSD.
--------
TODO
Solaris.
--------
TODO
Windows interactive.
--------------------
procexp.exe from Sysinternals.
Windows static.
---------------
handle.exe from Sysinternals::
cmd> handle d:\home
ispell.exe pid: 244 784: D:\home\drivers\token_api\src
Far.exe pid: 432 10C: D:\home\drivers\token_api