"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:
“We all have bad days, of course, a secret that only makes us feel more guilty. But once my friends and I started telling the truth about how far we deviated from perfection, we couldn’t stop. . . . One mother admitted leaving the grocery store without her kids—”I just forgot them. The manager found them in the frozen foods aisle, eating Eskimo Pies.””
—Mary Kay Blakely (20th century)
“If you are the Son of God, command these stones to become loaves of bread.”
—Bible: New Testament, Matthew 4:3.
Tempter to Jesus.
“Probably nothing in the experience of the rank and file of workers causes more bitterness and envy than the realization which comes sooner or later to many of them that they are “stuck” and can go no further.”
—Mary Barnett Gilson (1877–?)