Terminologies

  • Application running in user space can access kernel resources by directly invoking Linux system calls or by invoking libc (or glibc)-provided API calls. In the latter case, libc (or glibc) invokes a Linux system call.

  • Drivers in user space can directly access hardware, can access a Linux system call, or can access libc (or glibc) APIs. libc (or glibc) is an example library running in user space; there are many more such user space libraries.

  • bash is a Unix shell, a user command line interface (CLI). It is the default shell on Debian OS.

Shell Scripts

Source:

References

Tags:
os
linux