Add disk-warn.sh

disk-warn.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+# Purpose: Monitor Linux disk space and send an email alert to $ADMIN
+#ALERT=90 # alert level
+ALERT=90
+ADMIN="neshura@neshweb.net" # dev/sysadmin email ID
+df -H | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 }' | while read -r output;
+do
+  echo "$output"
+  usep=$(echo "$output" | awk '{ print $1}' | cut -d'%' -f1 )
+  partition=$(echo "$output" | awk '{ print $2 }' )
+  lockname=$(echo $partition | tr / _);
+  if [ $usep -ge $ALERT ]; then
+   if test -f "./$lockname.lock";
+    then echo "Found lockfile - Cancel mail";
+    else
+   touch "./$lockname.lock"
+   {
+      echo "TO: $ADMIN"
+      echo "Subject: Alert: Disk spage usage at $usep%/$ALERT%"
+      echo "Running out of space \"$partition ($usep%)\" on $(hostname) as on $(date)"
+   } |
+   ssmtp -F"Jellyfin" "$ADMIN"
+   fi
+  else
+   if test -f "./$lockname.lock"; then rm "./$lockname.lock"
+   fi
+ fi
+done