UNIX for Open: VMS Users by Philip Bourne, Richard Holstein and Joseph McMullen (Auth.)
By Philip Bourne, Richard Holstein and Joseph McMullen (Auth.)
UNIX for OpenVMS clients, 3E, makes it effortless to work out what OpenVMS and UNIX have in universal, and to move your wisdom and adventure in OpenVMS over to the realm of UNIX.
Since most department stores depend upon a couple of working procedure, it truly is severe for approach directors and executives to appreciate the similarities and transformations among systems, to allow them to simply paintings in either environments whereas taking complete good thing about the instruments and purposes on hand on each one. This e-book bargains OpenVMS execs a concise resource of data, for you to speedy convey their services to endure on UNIX dossier administration, e mail, networking, and security.
This new version of the e-book is greater with up to date references to VMS, accommodates feedback made by means of readers of prior variants, and especially, acknowledges different UNIX implementations as well as HP's Tru64.
· comprises huge additions to the sections on VMS logical names, at the emacs editor, and on shell programming and Perl
· Describes the interfaces universal to either working platforms, with appendices protecting command and editor summaries
· provides emphasis on Linux
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Sample text
8), most network files you access will appear to be available locally, and you need not specify (or even know) the host. Both OpenVMS and U N I X have similar rules for naming the components of a complete file specification. For example, U N I X file and directory names can have more than 30 characters, avoiding characters that have special meaning. The differences between U N I X and OpenVMS include the following: file specifications UNIX makes no provision for multiple versions of a file. Therefore, UNIX does not include version numbers as part of the filename.
Metacharacters will be discussed in subsequent chapters in the context of specific functions. The tilde (--), vertical bar (I), and greater than (>) characters are examples of metacharacters that we have already encountered. 6 summarizes metacharacters and their functions in the context of the various shells. ) The function of a metacharacter may vary depending on whether it is being interpreted by the shell or by a UNIX utility. 6 can serve as wildcards for file specifications, as discussed in the following section.
Second, UNIX uses a different command syntax. UNIX commanc names, although short, cannot be abbreviated and do not always bring to mind the command's function. For example, the OpenVMS commanc TYPE is a more logical choice than cat for displaying a file at the terminal. Single-letter options modify the functions of UNIX commands in a manner similar to the OpenVMS command qualifiers. Third, the novice UNIX user must learn new file and directory structures. Although bewildering at first, the elegance of the hierarchica arrangement of files and directories within the UNIX system becomes evident with use.