"Bad command or file name" is a common error message in Microsoft's MS-DOS and some other operating systems.
In command.com, the message Bad command or file name is produced if the user mistypes the first word of a command line. This first word must be either the name of a built-in "command", or of an executable file or batch file. Therefore the error was printing what, to the programmer, was an accurate description of the problem: there was no such command and there was no such file. Novices, in general, had trouble understanding the message, so later operating systems changed it; for instance, OS/2 and the Windows NT (and newer) family use
Some early Unix shells produced the equally-cryptic
Famous quotes containing the words bad, command and/or file:
“Men have made out, that only they can run the world. It’s in about as bad a state as it well can be, but they are proud of their work.”
—Ann Oddy, U.S. housekeeper. As quoted in All the Days of My Life, ch. 2 (1913)
“An actor must communicate his author’s given message—comedy, tragedy, serio- comedy; then comes his unique moment, as he is confronted by the looked-for, yet at times unexpected, reaction of the audience. This split second is his; he is in command of his medium; the effect vanishes into thin air; but that moment has a power all its own and, like power in any form, is stimulating and alluring.”
—Eleanor Robson Belmont (1878–1979)
“I have been a soreheaded occupant of a file drawer labeled “Science Fiction” ... and I would like out, particularly since so many serious critics regularly mistake the drawer for a urinal.”
—Kurt Vonnegut, Jr. (b. 1922)