In order for a digital system to operate it needs a main clock pulse and a bounce of secondary ones. The Raspberry Pi is not an exception to that rule and with some basic commands we can have those frequencies in our terminal
To find the CPU speed type:
the minimum speed:
and the maximum speed:
For me, the numbers are all the same as I am using a basic configuration without any overclocking or any other change from the basic Raspbian. The numbers output are in kilohertz, so the 700000 is translated to 700MHz. A usual figure for a “vanilla” Raspbian system!
You can also discover more system speed by using this command here:
vcgencmd measure_clock Clock_Name_Variable
where Clock_Name_Variable is one of the followings: arm, h264, isp, v3d, uart, pwm, emmc, pixel, vec, hdmi, dpi.
For example, on the following screenshot of an ssh session with my RPi you can see the uart speed, arm speed and hdmi speed.
An other important figure of a system is the voltages. You can find the core voltage using the following:
vcgencmd measure_volts core
The argument core can be changed by one of the followings: sdram_c, sdram_i, and sdram_p. For example
vcgencmd measure_volts sdram_c
Find enabled hardware codecs
To see which hardware codecs have been enabled to your system use this command:
vcgencmd codec_enabled Codec_Name
where Codec_Name can be: H264, MPG2, WVC1, MPG4, MJPG, WMV9
Again my default system is using the regular enabled codecs. Do enable all of those you have to pay a small fee to the Raspberry Pi community.
To find the memory info of your Pi type:
free -o -h
From here you can gather info like total memory, free memory, buffers etc
Monitor the Temperature
If you want to show the Raspberry Pi temperature then you can do that with a simple command from a terminal session with the Pi. To do that you can select on of the following methods.
The result will be a simple temperature value in Celsius like the one below:
An alternative answer to the same question is to use this command
and just divide the value with 1000 for degrees in Celsius
Giving me a result of 36.85°C