Question

Shell Script to show the status of various linux daemons, interfaces and disk space in motd.

Asked by: totalimpact

I am wondering if there are any pre-built shell scripts that show the status of common services, interfaces and disk space? I kind of have a start, but I was hoping there would be something freely available with nice formatting and all that.

I found this, and want to setup something similar on my Centos 5.3 server:
https://help.ubuntu.com/9.04/serverguide/C/update-motd.html

I downloaded the source, and I think I have it all ported to my platform, the only thing is my scripting skills are still very basic, i am choking on some areas. I wish it was better formatted, because theres still a couple of other items I  might add, and I am not sure if it will fit on one screen.

Specific status items I am looking for:
iptables
mysql
sendmail
webmin
samba
apache
sshd
df -h (show only the percentage free on /)
eth0 (UP? or DOWN?)
eht1 (UP? or DOWN?)
wlan0 (UP? or DOWN?)

Below is my rough draft

#!/bin/sh
#####Script to show status of daemons, interfaces and free disk space:
#########Apache status:
if [ -e /var/run/httpd.pid ]
then 
	echo "Webserver      	Online" > /etc/test.motd
else
	echo "Webserver      	Offline" >> /etc/test.motd
fi
#########MySQL status:
if [ -e /var/run/mysqld/mysqld.pid ]
then 
	echo "MySQL Database 	Online" >> /etc/test.motd
else
	echo "MySQL Database 	Offline" >> /etc/test.motd
fi
#########Sendmail status:
if [ -e /var/run/sendmail.pid ]
then 
	echo "Mailserver 	Online" >> /etc/test.motd
else
	echo "Mailserver 	Offline" >> /etc/test.motd
fi
#########Fail2ban status:
if [ -e /var/run/fail2ban/fail2ban.pid ]
then 
	echo "Fail2ban 	Online" >> /etc/test.motd
else
	echo "Fail2ban	Offline" >> /etc/test.motd
fi
#########SSHd status:
SSHSTAT=`/etc/init.d/sshd status |grep 'is running'`
if [ "$SSHSTAT" = "is running" ]
then 
	echo "SSH		 	Online" >> /etc/test.motd
else
	echo "SSH			Offline" >> /etc/test.motd
fi
#########Webmin status:
WEBMINSTAT=`/etc/init.d/webmin status |grep 'is running'`
if [ "$WEBMINSTAT" = "is running" ]
then 
	echo "Webmin		 	Online" >> /etc/test.motd
else
	echo "Webmin			Offline" >> /etc/test.motd
fi
##########Zaptel Status:
if [ -e /proc/zaptel/ ]
then 
	echo "Zaptel Trunks 	Online" >> /etc/test.motd
else
	echo "Zaptel Trunks Offline" >> /etc/test.motd
fi
#########Iptables status: 
FIREWALLSTAT=`/etc/init.d/iptables status`
if [ "$FIREWALLSTAT" = "Firewall is stopped." ]
then 
	echo "Firewall 	Offline" >> /etc/test.motd
else
	echo "Firewall 	Online" >> /etc/test.motd
fi
#########Eth0 status:
ETH0STAT=`ifconfig eth0 |grep UP | awk '{print $1}'`
if [ "$ETH0STAT" = UP ]
then 
	echo "LAN ETH0 	Online" >> /etc/test.motd
else
	echo "LAN ETH0  	Offline" >> /etc/test.motd
fi
#########Eth1 status:
ETH1STAT="ifconfig eth1 |grep UP | awk '{print $1}'"
if [ "$ETH1STAT" = UP ]
then 
	echo "LAN ETH1 	Online" >> /etc/test.motd
else
	echo "LAN ETH1  	Offline" >> /etc/test.motd
fi
#########Wlan0 status:
WLAN0STAT="ifconfig wlan0 |grep UP | awk '{print $1}'"
if [ "$WLAN0STAT" = UP ]
then 
	echo "Wireless 	Online" >> /etc/test.motd
else
	echo "Wireless  	Offline" >> /etc/test.motd
fi
#########Show percent used on root file system:
EXCLUDE_PARTITIONS="/auto/ripper|/dev/hda1|/dev/sda1|none|/dev/md0|/dev/md1|tmpfs|cdrom|Filesystem"
ROOTUSED=`df -H | grep -vE "^$EXCLUDE_PARTITIONS" | awk '{print $5 " " }' | sed 's/%//'`
if [ $ROOTUSED -gt 80 ]
then 
	echo "DANGER Disk space used: [31;47$ROOTUSED%" >> /etc/test.motd
else 
	echo "Disk space used: $ROOTUSED%" >> /etc/test.motd
fi
#########How many users are logged on:
echo "`who | wc -l` users are logged in" >> /etc/test.motd

                                  
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Asked On
2009-07-04 at 23:11:34ID24544528
Tags

update-motd daemon status script

Topics

Bourne-Again Shell (bash)

,

Bourne Shell (sh)

Participating Experts
1
Points
250
Comments
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Answers

 

by: mikelfritzPosted on 2009-07-13 at 11:21:08ID: 24842390

Your rough draft has a bunch of control  codes globbed in with it so it's difficult to read.  What happens if you run it and that cat /etc/test.motd

Does it take more than one screen and does it show what you want?

I don't see the update-motd package for centos but it would be easy to just have yours run through cron.

 

by: totalimpactPosted on 2009-07-13 at 13:52:29ID: 24843806

At the moment it does not fill more than 1 screen, but there are a couple of more items I wish to add before its done, at that point it will fill more than one screen, and I would like to double up the output into 2 columns - but I am not sure on how to build columns.

update-motd is so far only built for debian based systems - so yes, most likely I will just use cron, or .bashrc to load it.

 

by: mikelfritzPosted on 2009-07-13 at 16:01:45ID: 24844840

Can you repost your script.  Maybe just attach it so the paste does'nt mess it up.  I'm sure we could whip up an awk script to clean up the output for display.

 

by: totalimpactPosted on 2009-07-14 at 12:51:10ID: 24853385

How about this - does it look better:
http://pastebin.ca/1495067

 

by: mikelfritzPosted on 2009-07-15 at 07:38:55ID: 24859879

A little.  The ansi escape codes are getting goofed up...

So it looks like at this point you are using 13 lines of the page.  One easy way to scrunch it up would be to make all of your echo lines the same length and include trailing spaces and a seperator to seperate columns and then in every other section use "echo -n" to supress the newline.  So the echo looks like:
 echo -n "Webserver Online     -     "
 echo "MySQL Database Online"
 echo -n "Mailserver  Offline     -     "
 echo "Fail2ban               Offline"

That should give you something like:
Webserver Online     -     MySQL Database Online
Mailserver  Offline     -     Fail2ban               Offline

It might take a little tweaking to get it to look right.  The ansi escape codes could be put in after you get the layout right.

You could get a little more fancy by maybe making more columns for certain sections where the echo's are small enough.

 

by: totalimpactPosted on 2009-08-11 at 22:49:28ID: 31599876

The final answer was quite satisfactory, but I was still looking for someone to provide part of my original request for a ready to go status script.

20120131-EE-VQP-002

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