tmpfs in Linux

In Linux, tmpfs resides in the main memory, giving fast file access and update times. tmpfs is explained with example commands.

htop command in Linux

htop is a ncurses based program for viewing processes in a Linux system. htop gives information about processor, memory and swap usage.

The sar command gives information about CPU, I/O, paging, devices, memory, swap space, network, run queue, interrupts and power management.

The pidstat command gives the CPU utilization, I/O statistics, page faults and memory utilization for processes and threads in Linux systems.

vmstat prints information about system processes, memory, swap, I/O blocks, interrupts and context switches and the CPU activity.

The free command can be used to find the free and used memory in a Linux system. The free command is explained with an example.