Displays real-time system summary. Shows tasks, CPU usage, memory usage, and running processes. Usage: top
An enhanced version of top. Provides a more user-friendly interface . Usage: htop Install with: sudo apt-get install htop
Reports virtual memory statistics. Shows processes, memory, paging, block IO, traps, and CPU activity. Usage: vmstat
Monitors system input/output device loading. Helps identify performance issues with storage. Usage: iostat Install with: sudo apt-get install sysstat
Displays amount of free and used memory in the system. Shows swap usage as well. Usage: free -h (for human-readable format)
Provides network statistics. Displays network connections, routing tables, interface statistics, masquerade connections, and multicast memberships. Usage: netstat -tuln
Collects, reports, and saves system activity information. Useful for long-term performance analysis. Usage: sar Install with: sudo apt-get install sysstat