z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

Chapter 1. Introduction to shell commands and DBCS
This is an introduction to the shell commands and the doublebyte character set
(DBCS).
Reading the command descriptions
Format
Each shell command appears in alphabetic order. The description for each
command is divided into several topics, which are explained in the following
paragraphs. Some of these topics apply only to a few command descriptions. Also,
some command descriptions include special topics that are not explained here.
The Format topic provides a quick summary of the command’s format, or syntax.
The syntax was chosen to conform to general UNIX usage. For example, here is
the format of the ls command:
ls [–AabCcdFfgiLlmnopqRrstuWx1] [pathname ...]
The format takes the form of a command line as you might type it into the system; it
shows what you can type in and the order in which you should do it. The parts
enclosed in square brackets are optional; you can omit them if you choose. Parts
outside the square brackets must be present for the command to be correct.
The format begins with the name of the command itself. Command names always
appear in bold Courier (typewriter) font.
After the command name comes a list of options, if there are any. A typical z/OS
shell command option consists of a dash (–) followed by a single character, usually
an uppercase or lowercase letter. For example, you might have –A or –a.
Note: The case of letters is important; for example, in the format of ls, –a and –A
are different options, with different effects.
If you are going to specify several options for the same command, you can put all
the option characters after the same dash. Or you can put each option after its own
dash. Or you can rearrange the order of options. For example,
ls -A -a ls -Aa ls -a -A ls -aA
are all equivalent.
The format line shows options like in bold Courier (typewriter) font. In the
description of ls, all options are shown in one long string after the single dash. But
another common option form is:
-x value
where –x is a dash followed by a character, and value provides extra information for
using that option. For example, here is the format for the sort command, which
takes unsorted input and sorts it:
sort [–cmu]
[–o outfile]
[–t char]
[–yn]
[–zn]
[–bdfiMnr]
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