Tools of UNIX OS

Question

How tools are represented in the UNIX OS?

Answer 1

All devices are symbolized by files termed as special files which are situated in/dev directory. Therefore, device files and other files are named and accessed in similar way. A 'regular file' is merely an ordinary data file in the disk. A 'block special file' symbolizes a device with characteristics alike to a disk (that is, data transfer in terms of blocks). The 'character special file' represents a device with characteristics identical to a keyboard (that is, data transfer is by stream of bits in chronological order).