Which command would you use to view shared library dependencies for a program?

The command used to view shared library dependencies for a program is "ldd." This command is specifically designed to list the dynamic dependencies of executable files and shared libraries. When you run ldd followed by the name of a binary, it reveals all the shared libraries that the executable needs to run, along with the paths to those libraries on the filesystem.

This is particularly useful for developers and system administrators who need to troubleshoot issues related to missing libraries or to ensure that an application has all the necessary components to function correctly. By using ldd, you can quickly ascertain whether the required shared libraries are present and properly linked for a given program.

The other commands serve different purposes: "ls" is used to list files and directories in a filesystem, "readelf" displays information about ELF format files (including headers and sections, but not specifically library dependencies), and "file" identifies the type of a file (such as binary or text) but does not provide details about shared library dependencies. Thus, ldd is the most appropriate command for this specific task.