File System Alert Script

[Kyle D. Harris]

Here's what i'm looking to do:

Write a small script to send out a email notification to myself when a filesystem reaches a certain percent (say 96 %). I'm pretty sure i'd have to use the df command to go with the "awk" command to pull the % field. Can somebody give me a little help? The awk command is kicking my a$$.... Thanks alot to all!

Kyle Harris

[Balaji N]

++++++++++++cut here++++++++++++++
#!/usr/bin/awk -f

BEGIN {

#Skip the initial header output of bdf
getline

#set flag to do one time echoing stuff
flag=0

#The argument passed to this script is a path whose last few characters
#contain the hostname. Find the exact hostname
a = index(FILENAME,"tmp\/")
b=substr(FILENAME,a+4)
}
{

#Ignore some stuff like /net etc...
if (NF > 5) {
print substr($5,1,length($5)-1)

#Remove the % symbol and check if usage is more than 90%
if ( int(substr($5,1,length($5)-1)) >= 90 ) {

#Check for flag to print header in mail
if ( flag == 0 ) {
print "The following file system(s) are more than 90% full for " b
flag=1
}
#Print mountpoint, usage,....
print $1 "\t\t" $5 "\t\t" $6
}
}
}

END {
#Formatting stuff
if ( flag == 1) {
print "================="
}
}
++++++++++++end cut++++++++++++++

Pipe the output of bdf to this script and watch the output.

cheerio
-balaji

[Kyle D. Harris]

Belaji,
Linux doesn't have a BDF command. It's "df" in linux. Anyway, that looked pretty complex, but if it works it works. I imagined it would only be about 5 or 6 lines for the whole script.

[Balaji N · Accepted solution]

hey
sorry. this was a script which i used to use in the HP unix environment.

do this.

run df -h and save it a file.

save this snippet as some script.awk.

and run script.awk

if the filesystem size is greater than 90% it fill fill them.


i have a script which actually does an remsh into a list of hosts and calls this script for every host.

and sends a consolidated mail from it.

am leaving home in the next ten minutes. so if u need any more info, reply quickly.

cheerio
-balaji

[Kyle D. Harris]

I should be ok man. I'll be leaving work soon so i'll check your stuff out tomorrow. Thanks again. Pts were rewarded!..

Kyle

[Balaji N]

and here is a one liner for your work. modify accordingly.

df -k | awk '{if (int(substr($5,1,length($5)-1)) >= 90) { print $1 " is " $5 " full"}}'

cheers
-balaji

[Balaji N]

oh! no issues and thanks for the pts.
-balaji

[John Meissner]

Here is a script I put together that should suit your needs... you'll need to change a few minot things such as the send to address and figure out how often you want the script to run. But other than that I've tested this on my red hat box



mark=1
while [ $mark = 1 ]
do
df |
while read a b c d e f
do
MTP=$(echo $f | grep -v "Mounted on")
USE=$(echo $e | grep -v Use | sed 's/.$//g')
if [ "$USE" >= "96" ]
then
echo "$MTP $USE " | mailx -s "FS alert" sendto@work.com
sleep 100 #or whatever time
else
sleep 100 #or whatever time
fi
done
done

[Kyle D. Harris]

One more question... When you guys say greater then 90, i know your talking about the percent of a particular file system. Since the "df" command shows it 90% will it recognize 90 or not since the percent sign is immediately following it? Thanks.

Kyle

[Balaji N]

if u see mine, here is the part which strips the % and uses that as a no.

int(substr($5,1,length($5)-1))

-balaji