conio.h is a pre-standard header that never became standard, and where it might still be available, it would more likely be available for Windows (due to the DOS legacy) rather than Linux. You most likely do not need it anyway, e.g., perhaps the functionality that you are looking for may be available in a library like ncurses.Originally Posted by fixit7
Unless you're dealing with a header-only library, which is rare in C, you would be installing libraries, not just the header files. The "how" depends on the library, e.g., on Linux perhaps the library is available in your Linux distro's software repositories, or perhaps you might download the source code and do a ./configure, make, make install dance, or perhaps it uses some other build system, or perhaps you don't even need to install the library: SQLite distributes a header file with an "amalgamation" mega source file that you can copy over to your C source code and compile alongside your other source files, including the header where needed.Originally Posted by fixit7