GNU/Linux Getting System Information Statistics about CPU, Memory, Network and Disk (I/O operations)
Example
To get general statistics about main components of Linux family of stat commands are extremely useful
CPU
To get processors related statistics you can use mpstat command but with some options it will provide better visibility:
$ mpstat 2 10
Memory
We all know command free to show amount of (remaining) RAM but to see all statistic including I/O operations:
$ vmstat 2 10
Disk
To get general information about your disk operations in real time you can utilise iostat.
$ iostat -kx 2
Network
To be able to see what is happening with your network services you can use netstat
$ netstat -ntlp # open TCP sockets
$ netstat -nulp # open UDP sockets
$ netstat -nxlp # open Unix sockets
But you can find useful monitoring to see network traffic in real time:
$ sudo iftop
Optional
To generate statistics in real time related to I/O operations across all components you can use dstat. That tool that is a versatile replacement for vmstat, iostat and ifstat
