Dealing with filesystems is complex because modern operating systems provide file stores that map filenames to sequences of bytes and the representation may vary across various platforms. Using a Go library, we can access the persistent storage of a computer or server and deal with the file system architecture of the underlying operating system. Here we introduce the basic idea of file handling mechanisms and how to implement them in the Golang programming language. In Go, the API for file handling is well-knitted into the standard architecture of the language and provides extensive support for it. All general-purpose programming languages provide these facilities through various libraries. Programmatically handling a file essentially means working with it, such as getting metadata information, creating new files, or reading and writing data to and from a file format into a program’s internal data structure. Typically, main memory (or RAM) is used for temporary storage and hard disk, tape, and so on. Data can be stored in a file, which provides some form of a structure to the data and allows it to be stored permanently or temporarily depending upon the storage medium.
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