Several commands for observing system resources

Free

View the memory that is idle or used in the system.

Uname

Print system Information, kernal, cups, hardware, and more.

Uptime

Shows how long the system has been powered on, and the average load of 1, 5, and 15 minutes.

Netstat

View network-related information, network connections, routing tables, Interface states (Interface Statistics), masquerade connections, multicast members (multicast memberships), and more.

Dmesg

Check the core (kernel) for hardware testing and driver information, such as the form of CPU, hard disk, disc model and hard disk partition table, and so on.

Sar

He can be a useful tool when you want to proactively detect the state of a host's resources and then draw it as a chart. such as CPU statistics, master memory statistics.

Several commands for observing system resources