Create a script sends an email message to the user specified

Create a script sends an email message to the user specified on the command line if any of the file systems at more than 60% of capacity. The script should not process special file systems as /proc on the ce.uml.edu. It should only process file systems which are either locally mounted or are mounted via NFS.

An individual email should be sent for each filey system which is at the warning level (60%) There should be a subject on the email with a message \"Warning: File system <put file system the>here is at <X>% of capacity\" If the files system 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. The same program for this assignment must be able to be run on both CE.UML.EDU and CYBERSERVER.UML.EDU

Please upload the script for the assigment. Do not upload a Word Document. I may run the script on either or both of the machines to verify your work.

Example output of the df -k command on CE.UML.EDU

Filesystem            kbytes    used   avail capacity Mounted on
/dev/dsk/c0t0d0s0    11089228 6593301 4385035    61%    /
/proc                      0       0       0     0%    /proc
mnttab                     0       0       0     0%    /etc/mnttab
fd                         0       0       0     0%    /dev/fd
/dev/dsk/c0t0d0s5    6053358 1984237 4008588    34%    /var
swap                 3701808      80 3701728     1%    /var/run
swap                 3702784    1056 3701728     1%    /tmp
/dev/dsk/c0t1d0s7    39608035 13478135 25733820    35%    /backups
/dev/dsk/c0t1d0s0    30983686 4861760 25812090    16%    /users
/dev/dsk/c0t0d0s7    51379263 14579685 36285786    29%    /space
/space/local         51379263 14579685 36285786    29%    /usr/local
/space/opt/SUNWspro 51379263 14579685 36285786    29%    /opt/SUNWspro

This command -T shows the file system types, so you would only process ufs on this system

: /usr/local/bin/df -T
Filesystem    Type   1K-blocks      Used Available Use% Mounted on
/dev/dsk/c0t0d0s0
               ufs    11089228   6593301   4385035 61% /
/dev/dsk/c0t0d0s5
               ufs     6053358   1984246   4008579 34% /var
swap         tmpfs     3701720        80   3701640   1% /var/run
swap         tmpfs     3702696      1056   3701640   1% /tmp
/dev/dsk/c0t1d0s7
               ufs    39608035 13478135 25733820 35% /backups
/dev/dsk/c0t1d0s0
               ufs    30983686   4861760 25812090 16% /users
/dev/dsk/c0t0d0s7
               ufs    51379263 14579685 36285786 29% /space
/space/local  lofs    51379263 14579685 36285786 29% /usr/local
/space/opt/SUNWspro
              lofs    51379263 14579685 36285786 29% /opt/SUNWspro

With that in mind on ce.uml.edu, you can run which will produce the correct file systems

: /usr/local/bin/df -t nfs -t ufs
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/dsk/c0t0d0s0     11089228   6593301   4385035 61% /
/dev/dsk/c0t0d0s5      6053358   1984246   4008579 34% /var
/dev/dsk/c0t1d0s7     39608035 13478135 25733820 35% /backups
/dev/dsk/c0t1d0s0     30983686   4861760 25812090 16% /users
/dev/dsk/c0t0d0s7     51379263 14579685 36285786 29% /space

Example output of the dk -k command on CYBERSERVER.UML.EDU

Filesystem                   1K-blocks     Used Available Use% Mounted on
/dev/mapper/cyberserver-root 141716900 4354124 130266868   4% /
udev                            504896       12    504884   1% /dev
tmpfs                           102492      340    102152   1% /run
none                              5120        0      5120   0% /run/lock
none                            512452        0    512452   0% /run/shm
/dev/sda1                       233191    26961    193789 13% /boot
ce.uml.edu:/users             30984192 4861952 25812992 16% /users
ce.uml.edu:/space             51380224 14579712 36286464 29% /space

This command shows the filesystem types, you would process ext4, ext2 and nfs on this system

: df -T
Filesystem                   Type     1K-blocks     Used Available Use% Mounted on
/dev/mapper/cyberserver-root ext4     141716900 4354120 130266872   4% /
udev                         devtmpfs    504896       12    504884   1% /dev
tmpfs                        tmpfs       102492      340    102152   1% /run
none                         tmpfs         5120        0      5120   0% /run/lock
none                         tmpfs       512452        0    512452   0% /run/shm
/dev/sda1                    ext2        233191    26961    193789 13% /boot
ce.uml.edu:/users            nfs       30984192 4861952 25812992 16% /users
ce.uml.edu:/space            nfs       51380224 14579712 36286464 29% /space

With that in mind on cyberserver.uml.edu, you can run

: df -t ext4 -t ext2 -t nfs
Filesystem                   1K-blocks     Used Available Use% Mounted on
/dev/mapper/cyberserver-root 141716900 4354120 130266872   4% /
/dev/sda1                       233191    26961    193789 13% /boot
ce.uml.edu:/users             30984192 4861952 25812992 16% /users
ce.uml.edu:/space             51380224 14579712 36286464 29% /space

Solution

#!/bin/sh

# Set to email address to send to
EMAILADDR=$1

# Set WARNING percentage
ALERT=60

# Set CRITICAL percentage
CRITALERT=90

# List the filesystems and put in $output.
df -H | grep -vE \'^Filesystem|tmpfs|cdrom\' | awk \'{ print $5 \" \" $1 }\' | while read output;
do
# Get the percentage from the output.
usep=$(echo $output | awk \'{ print $1}\' | cut -d\'%\' -f1 )
# Get the partition
partition=$(echo $output | awk \'{ print $2 }\' )
# Compare with CRITALERT since it\'s higher value
if [ $usep -ge $CRITALERT ]; then
# echo the body to the mail program (-s is subject) and SEND
echo \"Running out of space \\\"$partition ($usep%)\\\" on $(hostname) as on $(date)\" |
mail -s \"Critical Warning: Warning: $partition is at $usep% of capacity\" $EMAILADDR
# If it\'s not above critical, test to see if it\'s above ALERT.
elif [ $usep -ge $ALERT ]; then
echo \"Running out of space \\\"$partition ($usep%)\\\" on $(hostname) as on $(date)\" |
mail -s \"Warning: $partition is at $usep% of capacity\" $EMAILADDR
fi
done