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Written by Oleksandr Gavenko (AKA gavenkoa), compiled on 2017-01-30 from rev ccaa2f364422+.

OS resource statistics.

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

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

Windows.

cmd> taskmgr

Solaris.

Interactive:

$ perfmeter

Static:

$ prstat

$ mpstat <num> <seconds>

See

http://developers.sun.com/solaris/articles/prstat.html
Topping top in Solaris 8 with prstat.

Memory consumption.

Linux interactive.

$ top
$ dstat

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

Shared memory segments:

$ ipcs -m -p

Process memory map:

$ pmap -x $PID
$ pmap -XX $PID

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.

$ ip link show
$ sudo ethtool eth0

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