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"foo" is not recognized as an internal or external command, operable program or batch file. Some early Unix shells produced the equally cryptic " foo: no such file or directory " again accurately describing what is wrong but confusing users.
Some commands are internal—built into COMMAND.COM; others are external commands stored on disk. When the user types a line of text at the operating system command prompt, COMMAND.COM will parse the line and attempt to match a command name to a built-in command or to the name of an executable program file or batch file on disk. If no match is ...
Windows Command Prompt: Gives command-line access to the file system, volumes and files. It can be used to run System File Checker ( sfc /scannow ) against an offline Windows installation and repair missing or corrupt files.
The command is analogous to the Stratus OpenVOS change_current_dir command. [9] cd is frequently included built directly into a command-line interpreter. This is the case in most of the Unix shells (Bourne shell, tcsh, bash, etc.), cmd.exe on Microsoft Windows NT/2000+ and Windows PowerShell on Windows 7+ and COMMAND.COM on DOS/ Microsoft ...
The line-oriented debugger DEBUG.EXE is an external command in operating systems such as DOS, OS/2 and Windows (only in 16-bit/32-bit versions [1]).. DEBUG can act as an assembler, disassembler, or hex dump program allowing users to interactively examine memory contents (in assembly language, hexadecimal or ASCII), make changes, and selectively execute COM, EXE and other file types.
Floppy-disk drive or adapter 700–799: Math coprocessor 900–999: Parallel printer port 1000–1099: Alternate printer adapter 1100–1299: Asynchronous communication device, adapter, or port 1300–1399: Game port 1400–1499: Color/graphics printer 1500–1599: Synchronous communication device, adapter, or port 1700–1799: Hard drive or ...
Some laptop drives and "green power" desktop drives are programmed to unload the heads whenever there has not been any activity for a short period, to save power. [ 68 ] [ 69 ] Operating systems often access the file system a few times a minute in the background, [ 70 ] causing 100 or more load cycles per hour if the heads unload: the load ...
FreeDOS 1.1, released on 2 January 2012, [12] is available for download as a CD-ROM image: a limited install disc that only contains the kernel and basic applications, and a full disc that contains many more applications (games, networking, development, etc.), not available as of November 2011 but with a newer, fuller 1.2. [13]