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The Unix system had been written almost exclusively in C, so the C shell's first objective was a command language that was more stylistically consistent with the rest of the system. The keywords, the use of parentheses, and the C shell's built-in expression grammar and support for arrays were all strongly influenced by C.
Accept the data and to store the data as a file at the server site STOU RFC 959 Store file uniquely. STRU RFC 959 Set file transfer structure. SYST RFC 959 Return system type. THMB Streamlined FTP Command Extensions: Get a thumbnail of a remote image file TYPE RFC 959 Sets the transfer mode (ASCII/Binary). USER RFC 959 Authentication username. XCUP
Server replies are multi-line, but always end with ### xyz<optional text> line. ### is a prefix to mark this line, xyz is the return code. Return codes are a superset to those used in FTP. The codes 000 and 001 are special, their meaning depends on presence of server output before the end line.
The C shell (csh or the improved version, tcsh) is a Unix shell created by Bill Joy while he was a graduate student at University of California, Berkeley in the late 1970s. It has been widely distributed, beginning with the 2BSD release of the Berkeley Software Distribution (BSD) which Joy first distributed in 1978.
In shells derived from csh (the C shell), the syntax instead appends the & (ampersand) character to the redirect characters, thus achieving a similar result. The reason for this is to distinguish between a file named '1' and stdout, i.e. cat file 2 >1 vs cat file 2 > & 1 .
tcsh added filename and command completion and command line editing concepts borrowed from the TENEX operating system, which is the source of the “t”. [7] Because it only added functionality and did not change what was there, tcsh remained backward compatible [8] with the original C shell.
A file transfer protocol is a convention that describes how to transfer files between two computing endpoints. As well as the stream of bits from a file stored as a single unit in a file system, some may also send relevant metadata such as the filename, file size and timestamp – and even file-system permissions and file attributes. Some examples:
In macOS, a read-only FTP file system is included that can be used either via the GUI (with ⌘ Command+K) or the command line (mount_ftp). The read-only limitation is noted in the man page for mount_ftp (on a macOS system, in Terminal.app, see "man mount_ftp"). However, the free application Macfusion includes a working implementation of FTPFS.