Bash Script Disk Space Utilization Report and EMail
3 likes4,866 views
This bash script generates an HTML disk usage report and emails it. It collects disk usage information using df, formats it into an HTML table, and emails the report. If disk usage exceeds 90%, the row is highlighted red and a critical alert is shown. Usage between 70-80% is highlighted orange. The report is generated daily and emailed to a recipient.
![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](https://image.slidesharecdn.com/linuxdiskspaceutilizationreport-151103125345-lva1-app6891/85/Bash-Script-Disk-Space-Utilization-Report-and-EMail-2-320.jpg)
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: [email protected] echo To: [email protected] 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.