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I am pretty close I think, but stuck. I don't know how to send an email to the user specified on the command line, and I receive an error stating -ge expecting a unary value(lines 13 and 17), and ']' missing. The class is not on shell scripting, and I managed all of this from scratch myself so any help would be appreciated. I don't know why the variable and comparison isn't working.

1. The problem statement, all variables and given/known data:
Create a script sends an email message to the user specified on the command line if any of the filesystems at more than 70% of capacity. The script should not process special filesystems as /proc on the ce.uml.edu. It should only process filesystems which are either locally mounted or are mounted via NFS.
An individual email should be sent for each filesystem which is at the warning level. There should be a subject on the email with a message "Warning: Filesystem <put filesystem the>here is at <X>% of capacity" If the filesystem is at greater than 90% of capacity, the "Warning" should be changed to "Critical Warning".
You may use any scripting language including /bin/sh, ksh, bash, awk or perl. Work done in the C-Shell (csh) will not be accepted. This assignment may be done either on ce.uml.edu or on your own Linux/UNIX system.


2. Relevant commands, code, scripts, algorithms:



3. The attempts at a solution (include all code and scripts):

Code:

#!/bin/sh
# set -x # Uncomment to debug this script
# set -n # Uncomment to check syntax without any execution
# Shell script to monitor or watch the disk space
####Main Script####

df -H | grep -vE '^Filesystem | none' | awk '{ print $1 " " $5 }' | while read
do
 echo $output
 perc=$(echo $output | awk '{ print $1 }' | cut -d'%' –f1)
 part=$(echo $output | awk '{ print $2 }' )

 if [ $perc -ge 90 ]; then
 echo "Critical Warning: Filesystem \"$part\" at “$perc”% of capacity | 
 mail -s "Critical Warning: Filesystem \”$part\” at “$perc”% of capacity”

 elif [ $perc -ge 70 && $perc -lt 90 ]; then
 echo "Warning: Filesystem \"$part\" at “$perc”% of capacity | 
 mail -s "Warning: Filesystem \”$part\” at “$perc”% of capacity”

 fi
done

4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):
University of Mass, Lowell, Unix/Linux System Admin 90.321-061, Professor Michael Richards, Michael_Richards@uml.edu

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