Added "StressTrash.sh".

Author: R. Diez

README.pod

@@ -273,6 +273,10 @@ a given number of iterations.
 Helps you create simple, dummy computing tasks that run in a given number of child processes for a given number of iterations.
 Useful for load testing.
 
+=item * B<< StressTrash.sh >>
+
+Stresses the system trash (recycle bin).
+
 =item * B<< build-xfce.sh >>
 
 Downloads and builds Xfce from source.

StressTrash/README.txt

@@ -0,0 +1,4 @@
+
+StressTrash.sh
+
+  Stresses the system trash (recycle bin).

StressTrash/StressTrash.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+
+# Some Linux distributions, like Ubuntu MATE 18.04.2, do not enforce any trash limits.
+# Sending a file to the trash bin does not release disk space.
+# You would expect that the system automatically deletes old trashed files
+# as needed, but it just does not happen on some distributions.
+#
+# This script creates and trashes files in a loop, in order to stress
+# the trash bin and check whether your system enforces its trash limits.
+#
+# In the case of Ubuntu MATE 18.04.2, when the disk fills up, you do get
+# the following dialog box:
+#
+#   This computer has only x,x GB disk space remaining.
+#
+#   You can free up disk space by emptying the Trash, removing unused
+#   programs or files, or moving files to an external disk.
+#
+# However, the stress script carries on and fills up the disk
+# until there are no free bytes left. That is actually an undesirable
+# situation, because full disks tend to cause trouble everywhere.
+# For example, choosing the "empty trash" option in the dialog box above
+# does not actually work, probably because the disk is full.
+#
+# This script uses tool 'trash', so remember to install package 'trash-cli' beforehand.
+#
+# Copyright (c) 2019 R. Diez - Licensed under the GNU AGPLv3
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+# set -x  # Enable tracing of this script.
+
+declare -r EXIT_CODE_ERROR=1
+
+abort ()
+{
+  echo >&2 && echo "Error in script \"$0\": $*" >&2
+  exit $EXIT_CODE_ERROR
+}
+
+
+# ------- Entry point -------
+
+if (( $# != 0 )); then
+  abort "Invalid number of command-line arguments."
+fi
+
+declare -r -i FILE_SIZE_KB=$(( 1 * 1024 * 1024 ))
+
+declare -i ITERATION_COUNTER=1
+
+while true; do
+
+  printf -v FILENAME  "StressTrashTestFile-%06d.bin"  "$ITERATION_COUNTER"
+
+  echo "Creating and deleting file $FILENAME ..."
+
+  dd  bs=1024  count="$FILE_SIZE_KB"  if=/dev/urandom  of="$FILENAME"  status="none"
+
+  trash "$FILENAME"
+
+  ITERATION_COUNTER=$(( ITERATION_COUNTER + 1 ))
+
+done