Reading files is no big deal with bash: you just redirect the input to the script or pipe the output of another command into the script, or you could do it inside the script if the file names are ...

File descriptor duplication allows two file descriptors to refer to the same open file. Since read normally reads from stdin and not file descriptor 7 or 8 we need a way to duplicate file descriptor 7 ...

When the shell adds lines to the history file (.bash_history), does it add new content to the beginning of the file or at the end? (ascending or descending by date?) ...