bash unset array

ArrayWhat is an array?An array in a computer refers to a data type that is organized in a certain order by a number of variables of the same type.The popular point is that the array is one of the variables, in terms of the current term is a variable

ArrayWhat is an array?An array in a computer refers to a data type that is organized in a certain order by a number of variables of the same type .The popular point is that the array is one of the variables, in terms of the current term is a

Bash Shell Basic features three (array)One, the array definitionAn array is a contiguous number of independent memory spaces, each of which corresponds to a variable. The bash shell supports only one-dimensional arrays, but there is no limit to the

Xi. functionsThe shell function is defined by the description of the shell grammar above and holds a series of commands waiting to be executed later. When the shell function name is used as a simple command name, a series of commands associated with

Summary of important Linux Knowledge & mdash; understand and learn about bash hardware, kernel, and shell. we must use shell to communicate the input commands with the kernel, so that the kernel can control the hardware to work correctly. The

5.2 Bash Variables The following variables are set or used in Bash. Other shells generally do not process these variables. Some variables used by Bash are also described in other chapters: for example, for variables used by tools for controlling

Shell script Programmingcompiler-------Interpreter static language: compiled language, strongly typed (variable), converted into executable format beforehand. c/c++/java/c# Dynamic Language: Interpreted language, weak type. The side explanation

1. What is shell? In fact, I have heard of shell before I came into contact with Linux. At that time, I was talking about shell programming and I knew nothing about it. But surprisingly, I remember this term when my memory is really bad. Okay,

Linux system learning notes: BASH programming uses var (elementelement...) to create array variables. When referencing elements in an array, use $ {var [I]}, I as the subscript, subscript @ to copy the original array, and subscript * to copy the

1. Legal shell and/etc/shells functions     shell has multiple versions, including Bourne Shell (SH), C shell, K-Shell, tcsh, etc. Normally Linux uses the Bourne Again Shell (Bash), which is the enhanced version of SH       can check/etc/shells to