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How to install ncurses library on a Linux (CentOS, Debian)

Ncurses library is missing? What it is and how do I install it on a Linux operating system?

Ncurses is a programming library that provides an API which allows the programmer to write text-based user interfaces in a terminal-independent manner. It is a toolkit for developing “GUI-like” application software that runs under a terminal emulator. It also optimizes screen changes, in order to reduce the latency experienced when using remote shells.

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Load monitoring in Linux using atop

What is atop?

The program atop is an interactive monitor to view the load on a Linux system. It shows the occupation of the most critical hardware resources (from a performance point of view) on system level, i.e. cpu, memory, disk and network.

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