add scripts directory with bash-assignment scripts

scripts/back_up.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+
+set -euo pipefail
+
+BACKUP_DIR="backups"                  
+LOG_FILE="backup.log"                 
+RETENTION=5                           
+
+
+if [ $# -eq 0 ]; then
+    echo "Error: No directory provided." | tee -a "$LOG_FILE"
+    echo "Usage: $0 /path/to/directory" | tee -a "$LOG_FILE"
+    exit 1
+fi
+
+SOURCE_DIR="$1"
+
+
+if [ ! -d "$SOURCE_DIR" ]; then
+    echo "[$(date '+%Y-%m-%d %H:%M:%S')] ERROR: Directory '$SOURCE_DIR' does not exist or is not a directory." | tee -a "$LOG_FILE"
+    exit 1
+fi
+
+
+mkdir -p "$BACKUP_DIR"
+
+
+TIMESTAMP=$(date '+%Y%m%d_%H%M%S')
+BACKUP_FILE="\( {BACKUP_DIR}/backup_ \){TIMESTAMP}.tar.gz"
+
+echo "[$(date '+%Y-%m-%d %H:%M:%S')] INFO: Starting backup of '$SOURCE_DIR' ..." | tee -a "$LOG_FILE"
+
+
+if tar -czf "\( BACKUP_FILE" -C " \)(dirname "\( SOURCE_DIR")" " \)(basename "$SOURCE_DIR")" 2>> "$LOG_FILE"; then
+    echo "[$(date '+%Y-%m-%d %H:%M:%S')] SUCCESS: Backup created → $BACKUP_FILE" | tee -a "$LOG_FILE"
+else
+    echo "[$(date '+%Y-%m-%d %H:%M:%S')] ERROR: Backup creation failed!" | tee -a "$LOG_FILE"
+    exit 1
+fi
+
+
+echo "[$(date '+%Y-%m-%d %H:%M:%S')] INFO: Rotating backups (keeping last $RETENTION) ..." | tee -a "$LOG_FILE"
+cd "$BACKUP_DIR" || exit 1
+ls -t backup_*.tar.gz 2>/dev/null | tail -n +$((RETENTION + 1)) | xargs -I {} rm -- "{}" 2>> "../$LOG_FILE" || true
+cd - > /dev/null
+
+echo "[$(date '+%Y-%m-%d %H:%M:%S')] INFO: Backup process completed successfully." | tee -a "$LOG_FILE"
+echo "--------------------------------------------------" | tee -a "$LOG_FILE"
+

scripts/file_manager.sh

@@ -0,0 +1,123 @@
+#!/bin/bash
+
+
+LOG_DIR="logs"
+LOG_FILE="$LOG_DIR/file_manager.log"
+
+
+mkdir -p "$LOG_DIR"
+
+log_action() {
+    local timestamp=$(date '+%Y-%m-%d %H:%M:%S')
+    echo "[$timestamp] $1" >> "$LOG_FILE"
+}
+
+# Usage
+usage() {
+    echo "Usage: $0 <command> [arguments]"
+    echo ""
+    echo "Commands:"
+    echo "  create <filename>          Create a new file"
+    echo "  delete <filename>          Delete a file"
+    echo "  list                       List files in current directory"
+    echo "  rename <oldname> <newname> Rename a file"
+    exit 1
+}
+
+if [ $# -lt 1 ]; then
+    usage
+fi
+
+COMMAND=$1
+shift
+
+case $COMMAND in
+
+    create)
+        if [ $# -ne 1 ]; then
+            echo "Error: create requires one filename."
+            usage
+        fi
+        TARGET=$1
+
+        if [ -e "$TARGET" ]; then
+            echo "Error: File '$TARGET' already exists. Overwriting not allowed."
+            log_action "CREATE FAILED: '$TARGET' already exists"
+            exit 1
+        fi
+
+        touch "$TARGET"
+        if [ $? -eq 0 ]; then
+            echo "File '$TARGET' created successfully."
+            log_action "CREATE: '$TARGET' created"
+        else
+            echo "Error: Failed to create file '$TARGET'."
+            log_action "CREATE FAILED: '$TARGET'"
+        fi
+        ;;
+
+    delete)
+        if [ $# -ne 1 ]; then
+            echo "Error: delete requires one filename."
+            usage
+        fi
+        TARGET=$1
+
+        if [ ! -f "$TARGET" ]; then
+            echo "Error: File '$TARGET' not found."
+            log_action "DELETE FAILED: '$TARGET' not found"
+            exit 1
+        fi
+
+        rm "$TARGET"
+        if [ $? -eq 0 ]; then
+            echo "File '$TARGET' deleted successfully."
+            log_action "DELETE: '$TARGET' deleted"
+        else
+            echo "Error: Failed to delete '$TARGET'."
+            log_action "DELETE FAILED: '$TARGET'"
+        fi
+        ;;
+
+    list)
+        echo "Files in current directory:"
+        ls -la
+        log_action "LIST: Directory listing performed"
+        ;;
+
+    rename)
+        if [ $# -ne 2 ]; then
+            echo "Error: rename requires oldname and newname."
+            usage
+        fi
+        TARGET=$1
+        NEWNAME=$2
+
+        if [ ! -f "$TARGET" ]; then
+            echo "Error: File '$TARGET' not found."
+            log_action "RENAME FAILED: '$TARGET' not found"
+            exit 1
+        fi
+
+        if [ -e "$NEWNAME" ]; then
+            echo "Error: '$NEWNAME' already exists. Cannot overwrite."
+            log_action "RENAME FAILED: '$NEWNAME' already exists"
+            exit 1
+        fi
+
+        mv "$TARGET" "$NEWNAME"
+        if [ $? -eq 0 ]; then
+            echo "Successfully renamed '$TARGET' to '$NEWNAME'."
+            log_action "RENAME: '$TARGET' → '$NEWNAME'"
+        else
+            echo "Error: Failed to rename '$TARGET' to '$NEWNAME'."
+            log_action "RENAME FAILED: '$TARGET' → '$NEWNAME'"
+        fi
+        ;;
+
+    *)
+        echo "Error: Unknown command '$COMMAND'"
+        usage
+        ;;
+esac
+

scripts/system_check.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+LOG_DIR="../logs"
+DATE=$(date +"%Y-%m-%d")
+LOG_FILE="$LOG_DIR/ system_report_$DATE.log"
+
+mkdir -p $LOG_DIR
+
+echo "System Report - $DATE" | tee $LOG_FILE
+echo "-----------------------" | tee -a $LOG_FILE
+
+echo "Disk Usage:" |  tee -a $LOG_FILE  
+df -h | tee -a $LOG_FILE 
+
+echo  "" | tee -a  $LOG_FILE
+echo "Memory Usage:" | tee -a $LOG_FILE
+free -m | tee -a $LOG_FILE
+
+echo "" | tee -a $LOG_FILE
+echo  "CPU Load:" | tee -a $LOG_FILE
+uptime | tee -a $LOG_FILE
+
+echo "" | tee -a $LOG_FILE
+echo "Total Running Processes:" | tee -a
+$LOG_FILE
+ps aux | wc -l | tee -a $LOG_FILE
+
+echo "" | tee -a $LOG_FILE
+echo "Top 5 Memory Consuming Processes:" 
+| tee -a $LOG_FILE
+ps aux --sort=-%mem | head -n 6 | tee -a $LOG_FILE
+
+usage=$(df / | awk 'NR==2 {print $5}' |
+sed 's/%//')
+
+if [ "$usage" -gt 80 ]; then
+    echo "WARNING: Disk usage is above 80%" | tee -a $LOG_FILE
+fi
+
+
+

scripts/user_info.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+mkdir -p logs
+
+read -p "What is your name? " name
+
+if [ -z  "$name" ]; then
+    echo "Name cannot be empty."
+    exit 1
+fi
+
+read -p "What is your age? " age
+
+if ! echo "$age" | grep -q '^[0-9]\+$'
+then
+    echo "Age must be a number."
+    exit 1
+fi
+
+read -p "What country are you from? " country
+
+if [ -z "$country" ]; then
+    echo "Country cannot be empty."
+exit 1
+fi
+
+if [ "$age" -lt 18 ]; then
+    category="Minor"
+elif [ "$age" -le 65 ]; then
+    category="Adult"
+else
+    category="Senior"
+fi
+
+echo "Hello $name from $country!"
+echo "You are an $category."
+
+echo "Name: $name | Age: $age | Country:
+$country | Category: $category" >> ../logs/user_info.log