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On DOS, OS/2, and Windows operating systems, the %PATH% variable is specified as a list of one or more directory names separated by semicolon (;) characters. [5]The Windows system directory (typically C:\WINDOWS\system32) is typically the first directory in the path, followed by many (but not all) of the directories for installed software packages.
A path (or filepath, file path, pathname, or similar) is a string of characters used to uniquely identify a location in a directory structure. It is composed by following the directory tree hierarchy in which components, separated by a delimiting character, represent each directory.
Standard environment variables or reserved environment variables include: %APPEND% (supported since DOS 3.3) This variable contains a semicolon-delimited list of directories in which to search for files. It is usually changed via the APPEND /E command, which also ensures that the directory names are converted into uppercase.
Despite this the executable was and is still available in 32-bit versions of Windows. Anyway, the command relied on %DPATH% environment variable, which can be edited with the dpath command. In the modern Windows installations only the dpath command is working despite the help message still is pointing to the append command. [4] [5]
If pushd is not provided with a path argument, in Unix it instead swaps the top two directories on the stack, which can be used to toggle between two directories. The popd command removes (or 'pops', in the stack analogy) the current path entry from the stack and returns to the path at the top of the stack as the new working directory. [4] [5]
The variable's contents can be displayed by typing SET COMSPEC or ECHO %COMSPEC% at the command prompt. The environment variable by default points to the full path of the command line interpreter. It can also be made by a different company or be a different version. Another use of this environment variable is on a computer with no hard disk ...
Creates a new directory. PATH Displays or changes the value of the PATH environment variable which controls the places where COMMAND.COM will search for executable files. PROMPT Displays or change the value of the PROMPT environment variable which controls the appearance of the prompt. RENAME, REN Renames a file or directory. RMDIR, RD
On earlier versions, such as Windows 2000 or Windows NT 4.0, the maximum length of the string is 2047 (2 11-1) characters. This limit includes the command line, individual environment variables that are inherited by other processes, and all environment variable expansions. [10] Quotation marks are required for the following special characters: [8]