How to check CPU usage?

You can check CPU usage using several commands in the terminal. Here are a few common methods:

Using top command:
```
top
```
This command provides a real-time view of system processes and their CPU usage.
Using htop command:
```
htop
```
If you have htop installed, it offers a more user-friendly interface for monitoring CPU usage and other system metrics.
Using mpstat command:
```
mpstat
```
This command shows CPU usage statistics. You may need to install the sysstat package to use it.
Using vmstat command:
```
vmstat 1
```
This command provides a snapshot of system performance, including CPU usage, updated every second.
Using ps command:
```
ps aux --sort=-%cpu | head
```
This command lists processes sorted by CPU usage, showing the top CPU-consuming processes.

Choose any of these methods based on your preference and the tools available on your system.