Memory is a crucial resource on any server that influences its smooth and swift operability. Thus, it is important that you know that amount of memory being used at any given time. Linux – as well as CentOS (widely used in cPanel/Plesk servers) – has several commands that let you check the memory usage on the server. free The free command can used to gauge the amount of … [Read more...] about How to Show Ubuntu, Centos, Linux Real Memory Usage