bash getopts

First, compile bash to implement the syslog logging function of Bash 1. This paper will realize the function of history record to syslog log through bash software, and it can be transferred to the remote log centralized server in real-time, which can realize the audit function of operation logs.Operating system version: CentOS 6.5 x642. Install 6.5 corresponding

GNU Bash incomplete fix Remote Code Execution Vulnerability (CVE-2014-6278) Release date:Updated on: Affected Systems:GNU Bash Description:Bugtraq id: 70166CVE (CAN) ID: CVE-2014-6278 Bash, a Unix shell, was written by Brian fox for the GNU program in 1987. The GNU Bash 4.3 bash43-026 and earlier versions do not proper

Article title: Bash instance (1 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Learning how to program with the bash scripting language will make daily Linux interactions more interesting and productive, while also taking advantage of the familiar and popular standar

Article title: basic programming of Bourneagainshell (bash. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. 　　 It is already running You may find that you are currently running bash. Bash is a standard Linux shell for various

There is a very serious bash vulnerability on the web that allows hackers to send remote commands to the server to easily steal privacy information, while many friends are not aware of what bash is and what bash means, so the following knowledge literacy article will bring some help. 　　What's bash?

"] When $ foo is empty, the above command becomes [ = "bar" ] Similarly, when the $ Foo package contains spaces: [ multiple words here = "bar" ] Both errors occur. So double quotation marks should be used to enclose variables: ["$ Foo" = bar] # It's almost perfect. But! When $ Foo starts with "-", the problem persists. In the newer Bash, you can use the following method instead. [[the keyword can correctly handle blank spaces, spaces, strip, and

Let's take a look at the simple technique for processing command line independent variables, and then look at the basic programming structure of bash. Receive independent variable In the sample program in the introductory article, we use the environment variable "$1" to reference the first command line independent variable. Similarly, you can use "$2" and "$3" to reference the second and third independent variables passed to the script. Here is an exa

Import getoptImport sysDef usage ():Print ('''This is help message-H -- help show help info-I -- input the input file or directory-G -- grep words-T -- time modify time-V -- verbose show verbose Information''')PassDef main ():Try:Opts, argS = getopt.

Bash should be the most popular shell script interpreter in Linux. (another shell is called Dash. I hate it too much .), As long as you work on Linux and want to enjoy yourself, you should be familiar with the most basic bash programming, because it will bring enough happiness to your work. This article will summarize some basic bash programming knowledge that I

Create scriptFunctional testing is a key part of software development-and bash loaded into Linux can help you easily complete functional testing. In this article, Angel Rivera describes how to use bash shell scripts to execute Linux applications by running commands. Program Function test. Because this script depends on the return code of the command line, you cannot apply this method to GUI applications.

1. Execute bash shell:(1) Go to the directory where the shell script is located: CD/root/tmp and execute./test. Sh. (2) execute shell script:/root/tmp/test. Sh in absolute path mode. (3) run the script CD/root/tmp bash test. Sh, sh test. Sh, or bash/root/tmp/test. Sh directly using bash or sh. (4) Execute./root/tmp/tes

] '#abc# Hello World# Hi WorldPractice:Pass a user name parameter to the script to determine if the user's user name is consistent with the group name of their base group, and the results are displayed.#!/bin/bash#if! ID $ >/dev/null; Thenecho "No such user"Exit 10Fiif [' id-n u $ ' = = ' id-n-G $ ']; Thenecho "The Same"Elseecho "Not the same"Fi=================================================================Exercise: Write a scriptPass a parameter (s

Bash string processing (against Java)-2. String Representation (String constant) In JavaYou know!Use single quotes to indicate character constants: 'C'Double quotation marks are used to indicate a String constant: "hello world"Java character escape\ U ???? Four-digit decimal Unicode Character\??? Three octal characters\ N newline (\ u000a) (Insert a newline in the text at this point .)\ T horizontal tab (\ u0009) (Insert a tab in the text at this poin

September 25, foreign exposure of a "destruction level" bash vulnerability, hackers can use this vulnerability to remotely execute arbitrary commands, complete control of the target system! the vulnerability is cve-2014-6271, mainly in bash version 1.14-4.3, and affected systems include: Red Hat Enterprise Linux (versions 4-7), Fedora distribution, CentOS ( Versions 5-7), Ubuntu 10.04 lts,12.04lts and 14.04

How to fix severe Bash vulnerabilities in CentOSHello, a very serious security vulnerability (vulnerability reference https://access.redhat.com/security/cve/CVE-2014-6271) was recently detected in the Linux official built-in Bash, hackers can take advantage of this Bash vulnerability to fully control the target system and initiate attacks, to avoid the impact on

Bash should be the most popular shell scripting interpreter on Linux today (and a shell called dash, I hate this stuff too much.) As long as you work on Linux and want to work more happily, you should be familiar with the most basic bash programming, because it will give you enough happiness to work. This article will summarize some of my own usual bash basic pro

10 shortcuts to master bash-general Linux technology-Linux technology and application information. The following is a detailed description. If you have input commands in a Linux shell Command Prompt, you may have used bash. Because it is the default shell of most modern releases of GNU/Linux. Bash shell is the main interface of the Linux operating system. It can

before you start introducing bash's configuration files, you need to know about the login shell and the Non-login shell. The two shell differences are as follows:* Login Shell: When you get bash, you need a complete login process, which is the login shell. such as: By the tty1 login, you need to enter the user name and password, this time to get Bash is login shell. * Non-login Shell: The way to get the

In the previous paragraph, I said: The true face of the so-called environment variable is actually an arbitrary string. When Bash starts, it imports a string containing the = sign into its own variable in the Environ array. Bash starts an external command by reorganizing its internal variables labeled as environment variables into a string array to assign to Environ In this article, we

Each C program has a main function, and each main function has a argv parameter, which is an array of strings, the value of which is specified by the parent process of the C program when it is started by the exec* function.A lot of people say that the value of the max in Bash is the value of argv[0] (zeroth argument) that the C program obtains in its main function, and we can demonstrate it through the function of the-a parameter of the EXEC command: