We can use the free command along with the option -h, in order to check the current RAM available using a human-readable format. The free command is one of the widely used commands to quickly check for RAM stats because it’s available on most Linux distributions. Just like the lsblk command, the free command can also be displayed in a human-readable format. It’s used to print the physical and swap memory usage by default, it prints to standard output. There are different methods to check memory usage per process in Linux, including command-line tools, graphical user interfaces (GUIs), and third-party tools. One thing which we have to note down is, however, a lot of memory can be used by buffers or caches if our system needs additional memory for the processes, then the kernel can free up this space. available: The amount of memory available on the system in kilobytes is referred to as available.cache: cache is the number of memories that is used by the page cache where data can be stored first before being written to the disk.You can manually analyze all the logs with the help of grep command and find out the cause of the memory issue. Why ps is 'wrong' Depending on how you look at it, ps is not reporting the real memory usage of processes. buffers: The memory that the kernel buffer use is referred to as buffers. log or in the syslog /var/log/syslog location. How do you measure the memory usage of an application or process in Linux From the blog article of Understanding memory usage on Linux, ps is not an accurate tool to use for this intent.shared: It represents the memory that is used by the tmpfs that is a virtual filesystem, and it appears to be mounted but belongs to the volatile memory.free: The term free means the amount of memory that is available on our system in kilobytes. When we run the htop command, then this will display you the overall information related to the RAM installation in which it.used: The term used means the amount of RAM currently we use on our system in kilobytes.total: The term total means the total amount of memory that is presently installed on our system in kilobytes.With the help of the free command, we can offer the following information: Just open a terminal and type the following command: free -m This will print out a table of information about your system’s memory usage, including the amount of free memory. We can see in the above image that the output is divided into two categories: memory (the actual RAM) and swap (also known as virtual memory). How To Check Memory Usage On Linux It’s easy to find out how much memory is available on a Linux system.
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