Added solution.md for Day-05 with and sample applied images #337
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WalkthroughThe changes across the Changes
Sequence Diagram(s)sequenceDiagram
participant User
participant Script
participant Cron
participant Backup
User->>Script: Run createDirectories.sh
Script->>User: Create directories
User->>Backup: Run backup.sh
Backup->>Backup: Create backup
Backup->>User: Backup success/failure
User->>Cron: Schedule backup script
Cron->>Backup: Execute backup every minute
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Actionable comments posted: 2
🧹 Outside diff range and nitpick comments (2)
2024/day05/solution.md (2)
93-109: Revise cron schedule and add maintenance strategyRunning backups every minute is not recommended for production environments:
- Consider a more reasonable schedule (e.g., daily or weekly) to avoid system overhead
- Add log rotation to prevent disk space issues
- Implement backup retention policy
Example crontab entry for daily backup at 2 AM:
0 2 * * * /path/to/backup.sh /target/path >> /var/log/backup.log 2>&1Also add log rotation config in
/etc/logrotate.d/backup:/var/log/backup.log { weekly rotate 4 compress missingok notifempty }
117-121: Enhance user management with security best practicesConsider improving the user creation process:
- Use
useraddwith appropriate flags for consistent user setup- Set up user groups and permissions
- Use non-interactive password setting for automation
Example:
# Create group sudo groupadd devops # Create user with specific settings sudo useradd -m -s /bin/bash -g devops -c "DevOps User" user1 # Set password non-interactively echo "user1:$(openssl rand -base64 12)" | sudo chpasswd # Add to sudo group if needed sudo usermod -aG sudo user1
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📒 Files selected for processing (3)
2024/day03/solution.md(1 hunks)2024/day04/solution.md(1 hunks)2024/day05/solution.md(1 hunks)
✅ Files skipped from review due to trivial changes (2)
- 2024/day03/solution.md
- 2024/day04/solution.md
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| #!/bin/bash | ||
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| <<Info | ||
| Author : Amitabh Soni | ||
| Date : 25/11/24 | ||
| Description : This script takes three arguments and creates a specified number of directories at once. | ||
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| Example : When executed as ./createDirectories.sh day 1 90, it creates 90 directories as day1, day2, day3, ... day90. | ||
| Info | ||
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| # For loop to create directories iteratively | ||
| for i in $(seq $2 $3); do | ||
| mkdir "$1$i" | ||
| done | ||
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| ``` |
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🛠️ Refactor suggestion
Add input validation and error handling to the script
The script needs several essential improvements for robustness:
#!/bin/bash
<<Info
Author : Amitabh Soni
Date : 25/11/24
Description : This script takes three arguments and creates a specified number of directories at once.
Example : When executed as ./createDirectories.sh day 1 90, it creates 90 directories as day1, day2, day3, ... day90.
Info
+# Check if correct number of arguments is provided
+if [ $# -ne 3 ]; then
+ echo "Usage: $0 <directory_prefix> <start_number> <end_number>"
+ exit 1
+fi
+
+# Validate that start and end are valid numbers
+if ! [[ $2 =~ ^[0-9]+$ ]] || ! [[ $3 =~ ^[0-9]+$ ]]; then
+ echo "Error: Start and end must be valid numbers"
+ exit 1
+fi
+
+# Validate that start is less than or equal to end
+if [ $2 -gt $3 ]; then
+ echo "Error: Start number must be less than or equal to end number"
+ exit 1
+fi
+
# For loop to create directories iteratively
for i in $(seq $2 $3); do
- mkdir "$1$i"
+ if ! mkdir -p "$1$i"; then
+ echo "Error: Failed to create directory $1$i"
+ exit 1
+ fi
done
+
+echo "Successfully created directories from $1$2 to $1$3"📝 Committable suggestion
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Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
Suggested change
| #!/bin/bash | |
| <<Info | |
| Author : Amitabh Soni | |
| Date : 25/11/24 | |
| Description : This script takes three arguments and creates a specified number of directories at once. | |
| Example : When executed as ./createDirectories.sh day 1 90, it creates 90 directories as day1, day2, day3, ... day90. | |
| Info | |
| # For loop to create directories iteratively | |
| for i in $(seq $2 $3); do | |
| mkdir "$1$i" | |
| done | |
| ``` | |
| #!/bin/bash | |
| <<Info | |
| Author : Amitabh Soni | |
| Date : 25/11/24 | |
| Description : This script takes three arguments and creates a specified number of directories at once. | |
| Example : When executed as ./createDirectories.sh day 1 90, it creates 90 directories as day1, day2, day3, ... day90. | |
| Info | |
| # Check if correct number of arguments is provided | |
| if [ $# -ne 3 ]; then | |
| echo "Usage: $0 <directory_prefix> <start_number> <end_number>" | |
| exit 1 | |
| fi | |
| # Validate that start and end are valid numbers | |
| if ! [[ $2 =~ ^[0-9]+$ ]] || ! [[ $3 =~ ^[0-9]+$ ]]; then | |
| echo "Error: Start and end must be valid numbers" | |
| exit 1 | |
| fi | |
| # Validate that start is less than or equal to end | |
| if [ $2 -gt $3 ]; then | |
| echo "Error: Start number must be less than or equal to end number" | |
| exit 1 | |
| fi | |
| # For loop to create directories iteratively | |
| for i in $(seq $2 $3); do | |
| if ! mkdir -p "$1$i"; then | |
| echo "Error: Failed to create directory $1$i" | |
| exit 1 | |
| fi | |
| done | |
| echo "Successfully created directories from $1$2 to $1$3" |
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Actionable comments posted: 1
🧹 Outside diff range and nitpick comments (2)
2024/day05/solution.md (2)
16-32: Add execution permission and shebang verificationWhile the script's core functionality works, consider these additional improvements:
- Ensure the script has proper execution permissions:
chmod +x createDirectories.sh- Consider using
/usr/bin/env bashin shebang for better portability-#!/bin/bash +#!/usr/bin/env bash
136-136: Fix grammatical error in user management sectionChange "printing there names" to "printing their names" for correct grammar.
🧰 Tools
🪛 LanguageTool
[uncategorized] ~136-~136: “there” seems less likely than “their” (belonging to them).
Context: ...- Creating users and printing there names : 
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2024/day05/solution.md(1 hunks)
🧰 Additional context used
🪛 LanguageTool
2024/day05/solution.md
[uncategorized] ~136-~136: “there” seems less likely than “their” (belonging to them).
Context: ...
- Creating users and printing there names :
🔇 Additional comments (1)
2024/day05/solution.md (1)
106-108: Optimize backup frequency and implement retention policy
Running backups every minute may:
- Consume excessive disk space
- Create unnecessary system load
- Lead to resource exhaustion
Consider:
- Adjusting the schedule to a more reasonable frequency (e.g., daily or hourly)
- Implementing a retention policy to remove old backups
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| ```bash | ||
| #!/bin/bash | ||
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| <<Info | ||
| Author : Amitabh Soni | ||
| Date : 25/11/25 | ||
| Description : This script will take backup of any directory or file and store it in the backup directory: /home/ubuntu/Day-05/backup | ||
| Info | ||
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| # Creating a function for backup creation | ||
| function create_backup() { | ||
| # Timestamp for backup naming | ||
| timestamp=$(date '+%Y-%m-%d_%H-%M-%S') | ||
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| # Target directory where backups are stored | ||
| target_dir="/home/ubuntu/Day-05/backup" | ||
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| # Backup filename | ||
| backup_file="${target_dir}/backup_${timestamp}.zip" | ||
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| # Create zip backup | ||
| zip -r "$backup_file" "$1" | ||
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| # Checking if the previous command successfully ran or not | ||
| if [ $? -eq 0 ]; then | ||
| echo "Backup created: ${backup_file}" | ||
| else | ||
| echo "Error: Failed to create backup." | ||
| return 1 | ||
| fi | ||
| } | ||
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| create_backup "$1" | ||
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| ``` |
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🛠️ Refactor suggestion
Add security considerations to backup script
Consider adding these security improvements:
- Set secure permissions on backup files
- Sanitize input paths to prevent directory traversal
# Create zip backup
zip -r "$backup_file" "$1"
+
+# Set secure permissions on backup file
+chmod 600 "$backup_file"Committable suggestion skipped: line range outside the PR's diff.
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Added solution.md for Day-05 with and sample applied images , which show the application of task for day 05 is performed successfully
Summary by CodeRabbit
New Features
Bug Fixes