While Linux doesn't have a single built-in automatic troubleshooter like Windows, there are several powerful tools available for diagnosing and fixing a variety of issues. Here are some tools that might be helpful:

1. **Networking:**
   - **Wireshark**: This is a network protocol analyzer for Unix and Windows. It allows you to inspect hundreds of protocols and perform live capture and offline analysis.
   - **Netstat**: This is a command-line tool that can provide information about network connections, routing tables, and network interface statistics.
   - **Nmap**: This is a network mapping tool that can discover hosts and services on a computer network.
   - **Iperf**: This is a tool for measuring the bandwidth and the quality of a network link.

2. **Performance Optimization:**
   - **Tuned**: This is a dynamic adaptive system tuning daemon that tunes system settings dynamically depending on usage, and it can improve performance.
   - **Sysstat**: This package includes the sar, iostat and mpstat which are system performance tools for Linux.
   - **Nmon**: This tool helps monitor system resources such as CPU usage, memory usage, network I/O, and disk I/O.

3. **Automated Diagnosis:**
   - **Cockpit**: This is a server manager that makes it easy to administer Linux servers via a web browser, allowing you to easily check system performance in a user-friendly interface.
   - **Monit**: This utility provides automatic maintenance and repair of system functions, and can execute meaningful causal actions in error situations.

Keep in mind that while these tools can be very helpful, they often require a fair bit of knowledge to use effectively. It's often a good idea to consult the documentation or look up tutorials for specific use cases. Additionally, automated tools can't always solve every problem, and sometimes manual intervention may be necessary to fully resolve an issue.
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