What utilities can be used to identify the main faults in a Linux system?

The following utilities are used to identify main faults in the Linux system:

• top or htop — monitoring CPU load, memory, and processes in real-time.
• dmesg — viewing kernel system messages, useful for diagnosing hardware issues.
• journalctl — viewing systemd logs, helps to find service errors.
• vmstat — statistics on memory, processes, input/output.
• iostat — disk usage monitoring.
• free — displaying memory information.
• ping and traceroute — checking network connections.
• strace — tracing system calls for debugging programs.
• lsof — list of open files and sockets.

Using these tools, you can quickly identify bottlenecks and causes of failures in the system.