how to check install system memory in linux code example

Example 1: linux memory usage

// linux command for reporting used memory percentage
$ free | grep Mem | awk '{print $3/$2 * 100.0}'
23.8171

Example 2: how can I check memory usage in linux?

for more information search this webside --
https://www.howtogeek.com/659529/how-to-check-memory-usage-from-the-linux-terminal/