Bash Script Disk Space Utilization Report and EMail
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Bash Script Generate Disk Space Utilization Report and EMail
![Bash Script To Generate Disk Usage Report and E-Mail
Overview
The purpose of this document is to generate HTML Disk usage report and email the report.
Applies To
CentOS 7, RHEL 7
Pre-requisites
Bash
Shell Script Snippet
#!/bin/bash
#
# Environment Variables
#
TODAY="at $(date '+%H:%M on %d-%b-%y')"
OutputFilename=$(date +"%b_%d_%Y".html)
#
# Remove old HTML File
#
if [ -f /tmp/${OutputFilename} ]; then
rm -f /tmp/${OutputFilename}
fi
#
# Create HTML File with Table
#
(
echo '<HTML><HEAD><TITLE>Disk Usage Statistics</TITLE></HEAD>'
echo '<BODY>'
echo '<H3>Disk Usage Report for server - '$(uname -n)'</H3>'
echo '<P>Report Generated '${TODAY}'</P>'
echo '<TABLE BORDER=3 CELLSPACING=2 CELLPADDING=0>'
echo '<TR BGCOLOR="#5CE6E6"> <TH>Filesystem</TH> <TH>1024 blocks (Total)</TH> <TH>Disk
Used</TH> <TH>Available</TH> <TH>Percentage Info</TH> <TH>Mounted On</TH> <TH>Critical
Alert</TH></TR>'](https://image.slidesharecdn.com/linuxdiskspaceutilizationreport-151103125345-lva1-app6891/85/bash-script-disk-space-utilization-report-and-email-1-320.jpg)
![Bash Script To Generate Disk Usage Report and E-Mail
#
# Collate Disk Usage Information
#
df -Pml |awk 'NR>1 && NF==6'|sort|while read FileSystem Size DiskUsed DiskFree DiskPercentUsed
MountPoint
do
PERCENT=${DiskPercentUsed%%%}
#
# Verify if disk usage is greater equal to, than set threshold limit - 90%
#
if [[ ${PERCENT} -ge 90 ]];
then
COLOR=red
CRITICALALERT="Yes, Notify"
#
# If the disk space used is greater than 70% and less than 80% set alert color as orange
#
elif [ ${PERCENT} -ge 70 ] && [ ${PERCENT} -le 80 ];
then
COLOR=orange
CRITICALALERT="No"
#
# Other usage percentage set color as green
#
else
COLOR=green
CRITICALALERT="NA"
fi
#
# Create Table Columns
#
echo '<TR><TD>'$FileSystem'</TD><TD ALIGN=RIGHT>'$Size'</TD>'
echo '<TD ALIGN=RIGHT>'$DiskUsed'</TD><TD ALIGN=RIGHT>'$DiskFree'</TD>'
echo '<TD><TABLE BORDER=0 CELLSPACING=3 CELLPADDING=0>'
echo '<TR><TD WIDTH='$((2 * $PERCENT))' BGCOLOR="'$COLOR'"></TD>'
echo '<TD WIDTH='$((2 * (100 - $PERCENT)))' BGCOLOR="gray"></TD>'
echo '<TD><FONT FONT-WEIGHT="bold" SIZE=-1
COLOR="'$COLOR'">'$DiskPercentUsed'</FONT></TD>'
echo '<TR></TABLE></TD><TD>'$MountPoint'</TD>'
echo '<TD><FONT font-weight="bold">'$CRITICALALERT'</TD></FONT></TR>'
done
echo '</TABLE><P><FONT font-weight="bold">By IT Team</P><BODY></HTML>'
) | tee ${0##*/}.html](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Bash Script Disk Space Utilization Report and EMail
- 1. Bash Script To Generate Disk Usage Report and E-Mail Overview The purpose of this document is to generate HTML Disk usage report and email the report. Applies To CentOS 7, RHEL 7 Pre-requisites Bash Shell Script Snippet #!/bin/bash # # Environment Variables # TODAY="at $(date '+%H:%M on %d-%b-%y')" OutputFilename=$(date +"%b_%d_%Y".html) # # Remove old HTML File # if [ -f /tmp/${OutputFilename} ]; then rm -f /tmp/${OutputFilename} fi # # Create HTML File with Table # ( echo '<HTML><HEAD><TITLE>Disk Usage Statistics</TITLE></HEAD>' echo '<BODY>' echo '<H3>Disk Usage Report for server - '$(uname -n)'</H3>' echo '<P>Report Generated '${TODAY}'</P>' echo '<TABLE BORDER=3 CELLSPACING=2 CELLPADDING=0>' echo '<TR BGCOLOR="#5CE6E6"> <TH>Filesystem</TH> <TH>1024 blocks (Total)</TH> <TH>Disk Used</TH> <TH>Available</TH> <TH>Percentage Info</TH> <TH>Mounted On</TH> <TH>Critical Alert</TH></TR>'
- 2. Bash Script To Generate Disk Usage Report and E-Mail # # Collate Disk Usage Information # df -Pml |awk 'NR>1 && NF==6'|sort|while read FileSystem Size DiskUsed DiskFree DiskPercentUsed MountPoint do PERCENT=${DiskPercentUsed%%%} # # Verify if disk usage is greater equal to, than set threshold limit - 90% # if [[ ${PERCENT} -ge 90 ]]; then COLOR=red CRITICALALERT="Yes, Notify" # # If the disk space used is greater than 70% and less than 80% set alert color as orange # elif [ ${PERCENT} -ge 70 ] && [ ${PERCENT} -le 80 ]; then COLOR=orange CRITICALALERT="No" # # Other usage percentage set color as green # else COLOR=green CRITICALALERT="NA" fi # # Create Table Columns # echo '<TR><TD>'$FileSystem'</TD><TD ALIGN=RIGHT>'$Size'</TD>' echo '<TD ALIGN=RIGHT>'$DiskUsed'</TD><TD ALIGN=RIGHT>'$DiskFree'</TD>' echo '<TD><TABLE BORDER=0 CELLSPACING=3 CELLPADDING=0>' echo '<TR><TD WIDTH='$((2 * $PERCENT))' BGCOLOR="'$COLOR'"></TD>' echo '<TD WIDTH='$((2 * (100 - $PERCENT)))' BGCOLOR="gray"></TD>' echo '<TD><FONT FONT-WEIGHT="bold" SIZE=-1 COLOR="'$COLOR'">'$DiskPercentUsed'</FONT></TD>' echo '<TR></TABLE></TD><TD>'$MountPoint'</TD>' echo '<TD><FONT font-weight="bold">'$CRITICALALERT'</TD></FONT></TR>' done echo '</TABLE><P><FONT font-weight="bold">By IT Team</P><BODY></HTML>' ) | tee ${0##*/}.html
- 3. Bash Script To Generate Disk Usage Report and E-Mail # # Send E-Mail Notification – Snippet # ( echo From: SendersEMailAddress@domain.com echo To: ReceiptsEMailAddress@domain.com echo "Content-Type: text/html; " echo Subject: Disk Usage Report for server `hostname` echo cat ${0##*/}.html ) | sendmail -t A Sample HTML E-Mail For the sake of demonstration, in this email notification, threshold was set as 30.