Task 1: Strengthen your shell scripting skills on real-world tasks

tasks/module_4/task-1/.bashrc

@@ -0,0 +1 @@
+source ./disk_space_monitor.sh

tasks/module_4/task-1/README.md

@@ -0,0 +1,13 @@
+# PR Instructions
+
+## Task 1
+
+In the first task, a name conflict occurred, so you can find a folder named `task-1` (instead of `task_1`) within the `tasks` directory, which contains a submodule `module_4`.
+
+## Task 2
+
+For the second task, you need to update your `.bashrc` file to match the one in this PR and specify the correct path in the `disk_space_monitor.sh` file.
+
+## Task 3
+
+To check the third task, simply run the script named `count_files.sh`.

tasks/module_4/task-1/count_files.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+count=$(find . -type f | wc -l)
+echo "Total number of files is $count"

tasks/module_4/task-1/disk_space_monitor.sh

@@ -0,0 +1,28 @@
+if [ -z "$DISK_THRESHOLD" ]; then
+    read -p "Enter the threshold value for disk space monitoring (default is 10%): " threshold
+    threshold=${threshold:-10}
+    export DISK_THRESHOLD="$threshold"
+fi
+
+DEFAULT_PS1="$PS1"
+WARNING_ADDED=false
+PREVIOUS_USED_PERCENTAGE=0
+
+check_disk_space() {
+  user_home="$HOME"
+  df_output=$(df -h "$user_home")
+  used_percentage=$(echo "$df_output" | awk 'NR == 2 {print $5}' | sed 's/%//')
+
+  if [ "$used_percentage" -ge "$DISK_THRESHOLD" ] && [ "$WARNING_ADDED" = false ]; then
+    PS1="\[\e[31m\][Warning: $used_percentage% space used] \[\e[0m\]$DEFAULT_PS1"
+    WARNING_ADDED=true
+  elif [ "$used_percentage" -lt "$DISK_THRESHOLD" ] && [ "$WARNING_ADDED" = true ]; then
+    PS1="$DEFAULT_PS1"
+    WARNING_ADDED=false
+  fi
+
+  PREVIOUS_USED_PERCENTAGE="$used_percentage"
+}
+
+PROMPT_COMMAND="check_disk_space"
+PS1="$DEFAULT_PS1"