![]() ![]() The shell reads each command and carries out the desired action either directly or by invoking separate utilities. A word is a sequence of characters from the character set defined by the current locale, excluding non-quoted metacharacters.Ī command is a sequence of characters in the syntax of the shell language. Vnames are used as function and variable names. ![]() ") and optionally preceded by a set of two dots (". A vname is a sequence of one or more identifiers separated by a dot (". Identifiers are used as components of variable names. An identifier is a sequence of letters, digits, or underscores starting with a letter or underscore. ![]() In ksh, a metacharacter is one of the following characters:Ī blank is a tab or a space. See invocation below for the meaning of arguments to the shell. rksh is a restricted version of the command interpreter ksh it is used to set up login names and execution environments whose capabilities are more controlled than those of the standard shell. Ksh is a command and programming language that executes commands read from a terminal or a file. ![]()
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