https://albazy.com/2010/01/%d8%b4%d8%b1%d8%ad-%d8%b7%d8%b1%d9%8a%d9%82%d8%a9-%d8%b9%d9%85%d9%84-file-system-check-%d9%84%d8%a3%d9%86%d8%b8%d9%85%d8%a9-%d9%84%d9%8a%d9%86%d9%83%d8%b3/