There are several performance tools available in Linux that can be used to troubleshoot problems with the system. Some of the most commonly used performance tools are:
top: The top command is a real-time system monitoring utility that shows the current usage of system resources, including CPU, memory, and swap. You can use top to identify processes that are consuming large amounts of resources and to identify potential performance issues.
vmstat: The vmstat command is a utility that provides information about system resources, including CPU, memory, swap, and I/O. You can use vmstat to identify performance bottlenecks and to diagnose problems with CPU, memory, or I/O.
sar: The sar command is a system activity reporter that can be used to collect and report data about system performance over time. You can use sar to track changes in system performance and to identify trends and patterns that may indicate performance issues.
iostat: The iostat command is a utility that provides information about I/O performance, including the utilization of disks and other storage devices. You can use iostat to identify I/O bottlenecks and to diagnose problems with disks or other storage devices.
netstat: The netstat command is a utility that provides information about network connections and network performance. You can use netstat to identify network performance issues and to diagnose problems with network connectivity.
strace: The strace command is a utility that can be used to trace system calls and signals. You can use strace to identify issues with system calls and to diagnose problems with system performance.
These are just a few examples of the performance tools that are available in Linux. There are many other tools that can be used to troubleshoot performance issues on a Linux system. The specific tool that you use will depend on the type of performance issue that you are trying to troubleshoot.