If you are seeing the error "Error while loading shared libraries: libXrender.so.1" when trying to run a program on a Linux system, it means that the program is trying to load a shared library called libXrender.so.1, but the library could not be found.
A shared library is a file that contains code and data that can be used by multiple programs. Shared libraries are typically used to provide common functionality that is shared by many programs.
The libXrender.so.1 library is a part of the X Window System, which is a system for displaying graphics on Linux and other Unix-like systems. It provides functions for rendering text and graphics on the screen.
To fix this error, you will need to install the libXrender package. On a Debian-based system, such as Ubuntu, you can install the package by running the following command:
sudo apt-get install libxrender1
This will install the libXrender package and the necessary dependencies. Once the installation is complete, you should be able to run the program without encountering the "Error while loading shared libraries: libXrender.so.1" error.