linux CPU usage checking commands

ADD  NEW COMMANDS TO GITHUB
https://github.com/sjcode236/linux/blob/master/lnxCPUcmds.py


To See CPU information
cat /proc/cpuinfo
procinfo     >>  procinfo is a small program that gathers some system information
lsdev  
top  >>   display  system summary info and a list of tasks currently being managed by the kernel


linux CPU usage  checking commands 

1)  top
1a) iostat
 # iostat -c
Linux 2.6.32-573.34.1.el6.x86_64 (pceccto0140)  01/05/2017      _x86_64_        (2 CPU)
avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           8.64    0.00   21.05    0.01    0.00   70.29
2)  mpstat
mpstat -A
mpstat -P ALL

3)   sar -u 2 5

4) Find CPU , MEM  usage by a  process
ps   -p 8564   -o  %cpu,%mem,cmd

5)Find out who is monopolizing or eating the CPUs
  ps -eo pcpu,pid,user,args | sort -k 1 -r | head -10
or
  ps -eo pcpu,pid,user,args | sort -r -k 1 | less

5a)Find out who is monopolizing or eating the Memory
  ps -eo pmem,pid,user,args | sort -k 1 -r | head -10
or
  ps -eo pmem,pid,user,args | sort -r -k 1 | less

6) Sort  process  by  cpu and memory usage
 ps aux --sort=-pcpu |head -10
ps aux --sort -pcpu   |head -10
ps aux --sort -pmem |head -10
ps aux   |sort -r  -k 3|more      ----> sort on  cpu usage  colum 3
ps aux   |sort -r   -k 4|more     ---->  sort on mem usage  colum 4

----------------------------------------------------------------
# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    1
Core(s) per socket:    1
Socket(s):             8
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 45
Model name:            Intel(R) Xeon(R) CPU E5-4620 0 @ 2.20GHz
Stepping:              7
CPU MHz:               2198.906
BogoMIPS:              4400.00
Hypervisor vendor:     VMware
Virtualization type:   full
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              16384K
NUMA node0 CPU(s):     0-7
---------------------------------------------------------------------------------

8 commands to check cpu information on Linux
http://www.binarytides.com/linux-cpu-information/


24 iostat, vmstat and mpstat Examples for Linux Performance Monitoring
http://www.thegeekstuff.com/2011/07/iostat-vmstat-mpstat-examples/?utm_source=feedburner

Use pgrep to find an applications process ID:

root@pcevoxf001o058:~# pgrep rabbitmq

9852

 find the exact command used to start a process:

root@pcevoxf001o058:~# ps auxf | head -1 && ps auxf | grep 9852 | grep -v "color=auto"

USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND

root      9852  0.0  0.0   4440   652 ?        S    Oct22   0:00 /bin/sh /usr/sbin/rabbitmq-server

from the example above – take the rabbitmq process ID of 9852 and see its child processes using the pstree command:

root@pcevoxf001o058:~# pstree -p 9852

rabbitmq-server(9852)───su(9868)───sh(9869)───beam.smp(9870)─┬─inet_gethost(10163)───inet_gethost(10164)

                                                             ├─{beam.smp}(9925)

                                                             ├─{beam.smp}(9926)

                                                             ├─{beam.smp}(9927)

how to view all the VASd processes and their related memory and CPU activity.  

root@pcevoxf001o058:~# ps auxf | head -1; ps uaxf | grep vasd | grep -v "color=auto"

USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND

root      1409  0.0  0.0  53388  6828 ?        Ss   Oct22   0:14 /opt/quest/sbin/.vasd -D -p /var/opt/quest/vas/vasd/.vasd.pid

daemon    1581  0.5  0.6 152444 105832 ?       S    Oct22  12:55  \_ /opt/quest/sbin/.vasd -D -p /var/opt/quest/vas/vasd/.vasd.pid

daemon    1590  1.2  0.2  94024 47584 ?        S    Oct22  29:28      \_ /opt/quest/sbin/.vasd -D -p /var/opt/quest/vas/vasd/.vasd.pid

Use pstree to see a clear “tree” breakdown of the processes:

root@pcevoxf001o058:~# pstree -p | grep vas

init(1)-+-.vasd(1409)---.vasd(1581)-+-.vasd(1590)

        |                           |-.vasd(1591)

        |                           |-.vasd(1592)

find cmd scripts

====New commands  check github  ===============
https://github.com/sjcode236/linux/blob/master/scripts/findCmds.rb

find command
scripts
awk , cut ,  etc

---------find commads -------------

To change ownership of link itself instead of pointed file

chown -h edw01:edw  sched

chown -h -R cauagt pcm

command to find link files

 find . -type l -print -exec chown -h root:system {} \;

  find . -type l -print

find . -type l -print -exec ls -al {} \;

find   xargs  usage

find /abinitio -print0 |xargs -0  chown -h root:sys

find /abinitio -print0 |xargs -0  ls –dl

command to find file with specific userid find  -exec  usage 

find . –user  userid/username

find . -user   501

find /users  -user sobyjose -exec ls -l {} \; -exec echo {}  \;

   

command to find file with specific group

find / -group groupid/groupname

      find / -group   503/osa

command to find files with specific name

  find . -name wk_mers_da* -print -exec chown -h edw01:edw {} \;

find . -name wk_mers_da -print -exec ls -al {} \;

command to find the file with specific sizes

find . –size 2048      (file with 1MB size)

find . –size +2048    (files more than 1MB size)

find . –size -2048    (file more than  1MB size)

To merge  Directories using find command 
cd ${SOURCE};
find . -type d -exec mkdir -p ${DEST}/\{} \;
find . -type f -exec mv \{} ${DEST}/\{} \;
find . -type d -empty -delete

-----!! can use  rsyc command also to merge directories 

rsync -av /images /images2 

If images with the same name exist in both directories, the command above will overwrite /images2/SOMEPATH/SOMEFILE with /images/SOMEPATH/SOMEFILE. 

If you want to replace only older files, add the option -u. If you want to always keep the version in /images2, add the option --ignore-existing.

If you want to move the files from /images, with rsync, you can pass the option --remove-source-files.

  list files with size more than 20MB and sort in revers order

find ../apps  -size +40960 -exec ls -l {} \; |sort -r -k 5

----- awk , cut , sed ,grep   ----------------------------------

More  than one command in a line is possible with  “;”

   date;pwd

->  grep commands

dmidecode -t baseboard |egrep -i "Desig|Bus|type|status"

dmidecode -t baseboard |grep -B1 -A3 Ethernet |egrep -i "Desig|Bus|type|status"

      -L, --files-without-match

grep -L : /sys/class/net/*/address

     -l, --files-with-matches

grep -l : /sys/class/net/*/address

       -H, --with-filename

grep -H : /sys/class/net/*/address

        -h, --no-filename

grep -h : /sys/class/net/*/address

       -n, --line-number

grep -n : /sys/class/net/*/address

---------script   examples --------------

Header of a cript

#!/bin/sh

set –x      -----------> to display commads on prompt

chfs  -m    /p1n4/edwprod1/partition25/mptsc1             /edwprod1/partition25/mptsc1

To list  the lines in a file

for i in `cat ./soby/userlist`

do

 print $i

done

To read names from a file and create homedirectories and set  ownerships

#!/bin/sh

#set -x

for i in `cat ./soby/userlist`

do

dirc=$i

mkdir  $dirc

owne=$i

grp=`lsuser -a pgrp $i |awk '{print $2}' |cut -c 6-`

chown $owne:$grp  /home/$dirc

print $dirc

done

To list all the physical volumes with pvid in the order of  bcu volume groups (used in dwpf3n1)

for i in $(lsvg  |grep bcu)

do                        

for j  in  $(lsvg -p  $i |awk '{print $1}' )

   do                     

        lspv  |grep $j    

    done                  

done                      

To send mail with bcc by reading the ids from file idlist

#!/usr/bin/ksh

if (( $#  <  2 )); then

print "no subject and To address "

exit

fi

subject=$1

to=$2

bcclist="~b "

for i in `cat  idlist`

do

bcclist=`echo "$bcclist " "$i"`

done

echo $bcclist

echo "$bcclist" > finalmail

echo "this is the body of message\n" >> finalmail

cat /etc/motd >> finalmail

mail -s "$subject"   $to  <  finalmail

to fill filesystem  with dummy files

i=11

while (( $i  <  330000 ))

do

if mkdir tst${i}

then

echo tst${i}

touch   tstfile${i}

cat  firstfile > tstfile${i}

cd tst${i}

touch tstfile${i}a

cat /testfs/firstfile > tstfile${i}a

cd /testfs

else

break

fi

i=$(($i + 1))

done

script to list the Physical volumes in bcu volume groups (server dwpf3n2)

for i in $(lsvg |grep bcu |awk '{print $1}')

do

lsvg -p $i

sleep 1

done

---------------------------------------

Loop for 0 to 100

i=0

while [ $i -le 100 ]

do

echo "Hello Soby checking the value of i=$i"

i=`expr $i + 1`

sleep 2

done

-----------------------------------------------------------------------

List all the  wwwn of all fcs adapters in system

  for i in $(lsdev -Cc adapter |grep fcs |awk '{print $1}')

 do

 k=`lscfg -vl $i |grep -i network `

 echo $i "---->  "$k

 done

---------------------------------------------------------------------------------

for i in $(lsvg)^Jdo^Jecho $i;lsvg -p $i  ;echo;echo;sleep 2^Jdone

---------------------------------------------------------------------------

Recreate  user after remove it

lsuser -f sobtest2  > /tmp/sobtest2.0

  vi /tmp/sobtest2.1     --> put the stirng values in double quotes

cat /tmp/sobtest2.0  |tr  '\n'  ' ' >/tmp/sobtest2.1

  vi /tmp/sobtest2.1     --> add mkuser command at begining and username at end

chmod 755 /tmp/sobtest2.1

rmuser -p sobtest2

rm -r sobtest2

/tmp/sobtest2.1

echo "username:passwd" |chpasswd

lsuser -f  larsk01  > /tmp/larsk01.0

  vi /tmp/larsk01.0     --> put the stirng values in double quotes

cat /tmp/larsk01.0  |tr  '\n'  ' ' >/tmp/larsk01.1

  vi /tmp/larsk01.1     --> add mkuser command at begining and username at end

chmod 755 /tmp/larsk01.1

rmuser -p larsk01

mv  /home/larsk01  /home/larsk01.old2

/tmp/larsk01.1

echo  “larsk01:temppass” | chpasswd

-------------------------------------------------------------------

    ln /tmp/t.sh

    ls -al

    ln /tmp/t.sh a

    ls -al

    cat *

    echo *

    ls *

    ls *.*

    ls *.

    ls *.

    echo ?.*

    echo ?

    echo *.?

    echo .[a-z]

    echo *.[a-z]

    echo *.[!a-p]*

    sort  file1

sort

34

67

87

2

6

7

CTRL d

   sort 34 56 2 8 45 75

    ls x* 2> err      redirecting stndard output

    cat e*

    wc

    wc err

    wc

    ls | sort

    ls | wc –l

echo line 1 > file1  ( write to file1)

echo  line 2  >> file1  (append to file1)

cat file1 >> file2

ed  file1

 r.   ->period matches any single character

1,$p     print all the lines

/ ... /  look for three chars surrounded by blanks

/   repeat  last search

1,$s/p.o/xxx/g  change all p.o  to xxx

1,$p  print all the lines

/^the/    find the line that starts with the

1,$s/^/xx/      insert  xx at the begining of each line

^     beging of the line

$     end of the line

abc$   matches characters 'abc' at the end of a line

^abc   matches chractes 'abc'  at the begining of line

\.$    matches any line ends with period

^\.    matches any line start with period

1,$s/..$//   delete the two characters form each line

^$  matches any line contains no characters

^ $   matches lines with single space character

/the/  find line containing the

/[tT]he/  look for the or The

/      continue serach  , 'n' also do same thing

/     once again

1,$s/[aeiouAEIOU]//G   delete all the vowels

/[0-9]/ find a line containing a digit

/^[A-z]/  Find a line that starts with an uppercase letter

1,$s/[A-Z]/*/g    change all uppercase letters to *

[^A-Z]   matches any character except an uppercase letter

[^A-Za-z]   matches any nonalphabetic character

1,$s/[^a-zA-Z]//g   delete all nonalphabetic characters

linux scripts

Check github.com/sjcode236