bash shell scripting tutorial

;3) Exitstatus=$?if[$exitstatus =0]; Then Echo "The chosen distro is:"$DISTROSElse Echo "You chose Cancel."fiCreate a Table dialog boxThe Radiolist dialog box is useful when you want to let the user select a list of multiple options in the Checklist dialog box, allowing only one to select.Grammar:Whiptail–title "" –checklist "" [] ...Instance:#!/bin/Bashdistros=$ (Whiptail--title"Test Checklist Dialog"--Checklist"Choose preferred Linux distros" the - 4"Debian" "Venerable Debian" on"Ubunt

here.no need to change the default shell articleCommand display: Yum Install Python-pip Pip install powerline-status Pip Show powerline-status Vim. BASHRC 1) Install PIP tool# Yum Install Python-pip2) Install power Line# pip install powerline-status install power Line# pip show powerline- Status View power line State metadata-version:1.1 name:powerline-status version:2.6 summary:the Ultimate Statusline/prompt U

Tags: Session One code VID Editor picture. com simple AC The MySQL Shell is an advanced command-line client as well as a code editor for Mysql. In addition to the Sql,mysql shell also provides scripting capabilities for JS and Python. When MySQL shell was conected to the MySQL server throught the x protocol, the X DEVA

Linux Shell script series tutorial (6): array and associated array This article mainly introduces the Linux Shell script series (6): array and associated array, this article explains what arrays and associated arrays are, defines and prints common arrays, and defines and prints associated arrays. For more information, see I. arrays and associated Arrays Array is

When you install new software in a terminal environment, you can often see the Information dialog box pop up and need your input. The type of dialog box has a password box, checklist, menu, and so on. They can guide you in an intuitive way to enter the necessary information, and the benefits of using such a user-friendly dialog box are obvious. As shown in the following illustration: When you write an interactive shell script, you can use su

This article mainly introduces the Linux Shell Script series tutorial (vi): array and associative array, this article explained what is the array and associative array, the definition prints the ordinary array, the definition prints the associative array and so on content, needs the friend to be possible to refer to under One, array, and associative arrays An array is an important part of a

bo friends Good, due to the continuous development of operation and maintenance related technology, personal ability has been improving, gradually accumulated experience can not be updated to the previous blog post. Therefore, in order to better help you learn the operation and maintenance technology, specifically for the shell and Python scripting language summary of the document, this document will not pe

To define an array value: The difference between an array variable and a scalar variable can be explained as follows. Say that you are trying to show the names of various students as variable sets. Each individual variable is a scalar variable, as follows: name01= "Zara" Name02= "Qadir" name03= "Mahnaz" name04= "Ayan" name05= "Daisy" We can use a single array to store all the names mentioned above. Here is the simplest way to create an array variable to assign a value to one of its indexes.

This article mainly introduced the Linux Shell Script Series tutorial (Seven): script debugging, this article explained the bash built-in debugging function and the custom debugging function and so on content, needs the friend may refer to under First, debug scripts Debugging is one of the important features that every programming language should implement, and

command does not exit execution of interactive commands)Three:#!/usr/bin/expectSet IP "IP Address" (defines a variable named IP, with a value of the rear IP address)Set user "username" (defines a variable named user, with a value of root)Set Password "password"Set Timeout 10Spawn ssh [email protected] $ipExpect {"Yes/no" {send "yes\n"; Exp_continue}"Password" {send "$password \ n"}}InteractFour#!/usr/bin/expectSet IP [lindex $argv 0] (defines a variable named IP, the first parameter)Set user [l

Linux Shell script series tutorial (5): mathematical operations This article mainly introduces the Linux Shell script series (V): mathematical operations. This article describes how to use let ,(()) and [] for arithmetic operations, use expr for arithmetic operations, use bc for arithmetic operations, you can refer to the following In any programming language, ar

For example:Declare-i Kk=8+16echo $kLine 1, use declare to set the property of the variable K beforehand as "integer".Line 2, since K is an integer, 8+16 is no longer a string, but a formula, so bash will perform the operation on it and finally assign the result 24 a K.It is important to note that: In a calculation, there can be no space between the operator and the operand, and it should be tightly connected. Special symbols do not

Bo friends, due to the continuous development of operation and maintenance related technology, personal ability is constantly improving, the daily accumulation of experience can not be updated to the previous blog post. Therefore, in order to better help you learn the operation and maintenance technology, specifically for the shell and Python scripting language summary of the document, this document will no

This article mainly introduces the Linux Shell Script series (iii): Variables and environment variables, this article explained the common variable, get the length of the string, environment variables and so on, the need for friends can refer to the First, topsy variables and environment variables Variables are an essential part of any programming language and are used to hold variables of various types. Scripti