File Space Usage Information and EMail Report - Shell Script
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This script generates an HTML report of the top 10 largest files and directories on a server by size and emails the report. It uses the du command to get disk usage information, sorts the results in descending order of size, and outputs the top 10 to a HTML table. The table is written to a file and emailed using sendmail to notify of disk space usage.
![Bash Script – File Space Usage Report and E-Mail
Overview
The purpose of this document is to generate HTML File Space usage information and email the report.
This script lists top 10 file space usage information.
Applies To
CentOS 7, RHEL 7
Pre-requisites
Bash
tee
Shell Script Snippet
#!/bin/bash
#
# Environment Variables
#
TODAY="at $(date '+%H:%M on %d-%b-%y')"
OutputFilename=$(date +"%b_%d_%Y".html)
SCAN_PATH=/
#
# Remove old HTML File
#
if [ -f /tmp/${OutputFilename} ]; then
rm -f /tmp/${OutputFilename}
fi
#
# Create Table Columns
#
(
echo '<HTML><HEAD><TITLE>Disk Utilization Report</TITLE></HEAD>'
echo '<BODY>'
echo '<H3>Disk Utilization 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> Filesize </TH> <TH> File Location </TH></TR>'](https://image.slidesharecdn.com/filespaceusagereportande-mail-151113070006-lva1-app6891/85/File-Space-Usage-Information-and-EMail-Report-Shell-Script-1-320.jpg)
File Space Usage Information and EMail Report - Shell Script
- 1. Bash Script – File Space Usage Report and E-Mail Overview The purpose of this document is to generate HTML File Space usage information and email the report. This script lists top 10 file space usage information. Applies To CentOS 7, RHEL 7 Pre-requisites Bash tee Shell Script Snippet #!/bin/bash # # Environment Variables # TODAY="at $(date '+%H:%M on %d-%b-%y')" OutputFilename=$(date +"%b_%d_%Y".html) SCAN_PATH=/ # # Remove old HTML File # if [ -f /tmp/${OutputFilename} ]; then rm -f /tmp/${OutputFilename} fi # # Create Table Columns # ( echo '<HTML><HEAD><TITLE>Disk Utilization Report</TITLE></HEAD>' echo '<BODY>' echo '<H3>Disk Utilization 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> Filesize </TH> <TH> File Location </TH></TR>'
- 2. Bash Script – File Space Usage Report and E-Mail # # Collate Disk Size Usage of File and its location # Read and assign values to variables # du ${SCAN_PATH} -Sh * 2>/dev/null | sort -rh | head -n 10 | while read DiskSpaceUsed FileLocation do echo '<TR><TD>'$DiskSpaceUsed'</TD><TD>'$FileLocation'</TD></TR>' done echo '</TABLE><P>' echo 'Report generated by IT Admin Team</P></BODY></HTML>' ) | tee ${0##*/}.html # # 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