Used – Used memory (calculated as total – free – buffers – cache)įree – Unused memory (MemFree and SwapFree in /proc/meminfo) Total – Total installed memory (MemTotal and SwapTotal in /proc/meminfo) The information is gathered by parsing /proc/meminfo. free displays the total amount of free and used physical and swap memory in the system, as well as the buffers and caches used by the kernel. We can also check Linux memory usage from the GUI using tools such as the GENOME System Monitor.Free – Display amount of free and used memory in the system.Using the top and vmstat, we can monitor memory usage in real-time from the terminal itself.To check Linux memory usage, various command line tools are available, such as top, free, vmstat, and dmidecode.It is essential for us to check the memory usage of our operating systems to ensure their smooth functioning.The above example is the graphical representation of the memory usage information, available in the "Resources" tab of the System Monitor. Once opened, it will display detailed information about the system's resource usage, including memory usage. To open the GNOME System Monitor, go to the Applications menu and search for "System Monitor". It is available on most Linux distributions with a GNOME desktop environment. One of the popular GUI tools for monitoring memory usage is the GNOME System Monitor. In Linux, you can also check memory usage using a graphical user interface (GUI) system monitor tool that provides an intuitive graphical representation of system resource utilization. Checking Memory Usage in Linux Using the GUI The -t option is used to specify the type of hardware information to retrieve and 17 is the type number that corresponds to the memory module type in the DMI table. In the above example, the sudo command is used to provide root privileges to dmidecode. The command will display information about the memory modules installed in the system, including the type, speed, and size of each module. To check memory usage with dmidecode, you can use the following command: This can include details about the motherboard, processor, BIOS, and memory. It requires root privileges and reads the system's DMI (Desktop Management Interface) table, which contains detailed information about its hardware components. The dmidecode command in Linux is a tool that can be used to retrieve hardware information, including memory usage. COMMAND: The name of the command that started the process.TIME+: The total CPU time used by the process.%MEM: The percentage of memory usage by the process.%CPU: The percentage of CPU usage by the process.S: The status of the process (running, sleeping, etc.).SHR: The amount of shared memory the process is using.RES: The amount of physical memory the process is using.VIRT: The amount of virtual memory the process is using.NI: The "nice" value of the process, which is a measure of its priority.
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