How to check memory in linux?

How to check the memory in Linux: 1. Check the memory through the "/proc/meminfo" method; 2. Use the free command to check the memory; 3. Use the ps command to display the memory usage of each process; 4. Use top The command displays the real-time memory usage of each process.

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1) The easiest way to check RAM usage is through /proc /meminfo. This dynamically updated virtual file is actually a combination of many other memory-related tools (such as free/ps/top). /proc/meminfo lists all the memory usage you want to know about.

$ cat /proc/meminfo

2) The free command is a quick way to view memory usage. It is an overview of the information collected by /proc/meminfo.

#3) The ps command can display the memory usage of each process, as well as more detailed physical memory usage and virtual memory usage. You can use the "-sort" option to sort processes, such as sorting by RSS:

$ ps aux --sort -rss

4) The top command displays the real-time memory usage of each process. It provides reports on the resident memory size of all processes, total program memory size, shared library size, etc.

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