shell script to get CPU, RAM usage report

bala1989murugan · 03-02-2017, 08:36 AM

Dear Linux lovers,
I need to get CPU, RAM and Disk usage report.

I have executed below mentioned script from my test server.
It's logging in to other server. but its providing test server details. Unable to capture other servers details.

I have stored all servers hostname in test file

for bala in $(cat /tmp/test)
do
echo "###############$bala###################"
ssh $bala df -PhT | awk '{print $3,$4,$5,$7}'
echo "*****************************"
top -b -n1 | grep "Cpu(s)" | awk '{print $2 + $4,$5}'
echo "*************************"
egrep 'processor|core id' /proc/cpuinfo
echo "***************"
free -m
echo "****************************"
done >>/tmp/checklist3.txt

Kindly correct me .
Or else provide another bash script to get these details.

Thanks Team.

szboardstretcher · 03-02-2017, 08:39 AM

Want to add quotes around your command:

Code:

ssh $bala "df -PhT | awk '{print $3,$4,$5,$7}'"

Turbocapitalist · 03-02-2017, 08:46 AM

It will be easier to read when you wrap your script in [code] [/code] tags.

If you want all of those programs to run on the remote machine, you'll need to actually run them on the remote machine not the local host.

Code:

ssh $bala "df -PhT | awk '{print $3,$4,$5,$7}'; top -b -n1 | awk '/Cpu(s)/ {print $2 + $4,$5}'; echo '*************************'; egrep 'processor|core id' /proc/cpuinfo; echo '***************'; free -m; echo '****************************';"
done >>/tmp/checklist3.txt

See the manual page for ssh for a little more but, if nothing else, notice the quotes above.

bala1989murugan · 03-02-2017, 03:07 PM

It's getting error.

szboardstretcher · 03-02-2017, 03:17 PM

Show error.

Turbocapitalist · 03-03-2017, 02:28 AM

Quote:

Originally Posted by bala1989murugan

It's getting error.

Yes, it would help to show the error, but looking at the line in the previous post I wrote, I had not escaped the awk variables. The whole line is within double quotes and thus any dollar sign needs to be escaped:

\$2, \$3, \$4

etc.

It is important to note the quotes used and how they are or aren't nested. You'll need to read a bit about quoting as well. Items in single quotes are taken literally by the shell. Items within double quotes are interpreted by the shell, so items like variables must be escaped if you wish to prevent the shell from interpreting them.

ondoho · 03-04-2017, 05:59 AM

on a side note (it's what came to mind when i saw the thread title) - it's possible to use conky with CLI only.

MadeInGermany · 03-04-2017, 08:37 AM

Passing a script as argument bears trouble because of the local AND remote evaluation.
It is much easier to have a local checkhost.sh

Code:

#!/bin/bash
df -PhT | awk '{print $3,$4,$5,$7}'
echo "*****************************"
top -b -n1 | grep "Cpu(s)" | awk '{print $2 + $4,$5}'
echo "*************************"
egrep 'processor|core id' /proc/cpuinfo
echo "***************"
free -m
echo "****************************"

And a loop scrip checkallhosts.sh

Code:

#!/bin/sh
for bala in $(cat /tmp/test)
do 
echo "###############$bala###################"
ssh -x "$bala" /bin/sh < checkhost.sh
done >>/tmp/checklist3.txt

The loop script opens the checkhost.sh as a stream and passes it via the ssh to the /bin/sh on the remote host.