unix scripting tutorial

Vulnerability Release Date:Vulnerability Update Time:Vulnerability causeDesign ErrorHazard levelLowImpact SystemXML Security Library 1.xUnaffected SystemHazardsRemote attackers can exploit this vulnerability to obtain sensitive information or bypass authentication to access restricted resources.Attack ConditionsAttackers must access HP Operations.Vulnerability InformationHP Operations is a Distributed Client/Server software product used to manage distributed environments.HP Operations on

Chapter 23rd UNIX File SystemNamed pipe Mkfifo:mkfifo [-M mode] pipe. Named pipes must be created explicitly and will not disappear (the RM command can be removed).The proc file is a pseudo-file used to access kernel information. For example, if a process ID is 1952, the process-related information can be found in a file in the/proc/1952 directory.The VFS (virtual file system) implements the details of file processing.24th Directory Operations~ Repres

1:unix file Type-3 typesNormal files (regular files): Text files (plain text, scripts, source programs, configuration files, HTML, etc.), binary files (multimedia files, databases, etc.)Directories: for organizing filesPseudo-file: does not store data for the purpose of providing a service. Divided into three kinds:Special files: Device drivers, file representations of physical devices (keyboards, monitors, etc.)Named pipes: Directing the output of on

Transfer from http://blog.chinaunix.net/uid-20328094-id-95121.htmlA very good bash scripting tutorial, at least not in contact with bash can read!Create a scriptThere are many different shells in Linux, but usually we use Bash (Bourne again shell) for Shell programming because bash is free and easy to use. So the script I've provided in this article is all about using bash (but in most cases these scripts c

# input Check:If [-Z ']; ThenError "Error:you must specify a file, use-h for help"FiFilen= "$"# Rename any. 1,. 2 etc File:For N in 9 8 7 6 5 4 3 2 1; DoIf [-F ' $filen. $n "]; Thenp= ' expr $n + 1 'echo "MV $filen. $n $filen. $p"MV $filen. $n $filen. $pFiDone# Rename the original file:If [-F "$filen"]; Thenecho "MV $filen $filen. 1"MV $filen $filen. 1Fiecho Touch $filenTouch $filenHow does this script work? After detecting a file name provided by the user, we perform a 9 to 1 loop. File 9 is na

script rotatefile can solve this problem. This script can rename the message to save the file (assuming outmail) is OUTMAIL.1, and for outmail.1 it becomes outmail.2 and so on ... The code is as follows: #!/bin/sh # vim: set sw=4 ts=4 et: ver="0.1" help() {   cat How does this script work? After detecting a file name provided by the user, we perform a 9 to 1 loop. File 9 is named 10, file 8 is renamed to 9, and so on. After the loop is complete, we name the original file 1

management, file management, package management, and other basic automation requirements than tedious manual work. In this scenario, Ruby is very useful. It has a very good library to meet this point. For this article, I assume that the reader has the application knowledge of Ruby. The basic examples provided here use pure Ruby, so can any UNIX-like support in Ruby? System and Windows? Run on. For more advanced Cfruby examples, you need to be able t

php script in Enterprise Dev? Obviously, PHP scripting is considered too much of an ASP programming and JSP programming, so it's useless, but it doesn't exactly match the facts. The PHP script itself is a powerful language. It's actually on every Linux distribution, and also on Mac OS X. Get Dev and widget (building-block) with PHP script codes toot and software are free. The Business Integration Dev Environment (commercial integrated development env

As we all know, PHP (as the current mainstream development language) is a very good dynamic web development language (fast, short development cycle ...). ）。 But only a very small number of people realize that PHP (as the current mainstream development language) can also be very good as the language of writing shell scripts, when PHP (as the current mainstream development language) as the language of writing shell scripts, he is not as powerful as Perl or bash, But he has a very good advantage, e

Before reading, please take 30 seconds to view the preface (in the first and second chapters) UNIX Linux University tutorial-Chapter 1 and II study notes about UNIX what is Linux? What is UNIXUNIX Linux University tutorial-Chapter 3 and Chapter 4 Study Notes UNIX connect

Use PHP as the Shell scripting language. We all know that PHP is a very good dynamic web page development language (fast speed, short development cycle ......). However, only a few people realize that PHP can also be well written. we all know that PHP is a very good dynamic web page development language (fast speed, short development cycle ......). However, only a few people realize that PHP can also be a good language for writing Shell scripts. When

How to use PHP as a Shell scripting language. We all know that PHP is a very good dynamic web page development language (fast speed, short development cycle ......). However, only a few people realize that PHP can also be well written as S. We all know that PHP is a very good dynamic web page development language (fast speed, short development cycle ......). However, only a few people realize that PHP can also be a good language for writing Shell scri

, The interpreter (interpreter) needs to read the source code that we wrote and convert it to the target (object), which is then run by the computer. Because each execution of the program is more than the compilation process, so efficiency has decreased.The advantage of using scripting languages is that they are mostly run at a higher level than the compiled language and can easily handle objects such as files and directories, and the disadvantage is

shell script will output on the display:Hello, Darrell brogdon! How is you today?[Dbrogdon@artemis dbrogdon]$PHP also contains the "$ARGV" array when it is written as a dynamic Web page, but there are some differences: when PHP is the Shell scripting language, "$argv [0]" corresponds to the file name of the script, and when used for dynamic Web page writing, "$argv [1]" Corresponds to the first parameter of the QueryString. Second, write an interacti

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Shell Getting Started Tutorial (1)-shell-JUSTKK's Column-Blog channel-csdn.nethttp://blog.csdn.net/justkk/article/details/43795131 Shell Getting Started Tutorial (2)-Variables and Parameters-JUSTKK-Blog channel-csdn.nethttp://blog.csdn.net/justkk/article/details/44081993 Shell Getting Started Tutorial (3)-command editor-JUSTKK's column-Blog channel-csdn.nethttp:/

C # Game-Assisted Scripting Learning record (September 3, 2017)Use ideasUse the ListBox control to display all my tasks and the tasks I have selected.Left is listbox_ selected task , right is listbox_ task ListDouble-click Add content to another ListBox list (from task List → selected task)Using the double-click event in the ListBox, there are 2 double-click events, DoubleClick and MouseDoubleClickI do not know what is the difference, try to feel the

, it is important to note that if a variable $param is defined in the B.VM , the value defined in the B.VM will be used in B.VM. Ten． Escape characteruse of ' \ 'If reference is defined, two ' \ ' means output a ' \ ', if not defined, just as it is output. such as: #set ($email = "foo")$email\ $email\ \ $email\\\ $emailOutput:Foo$email\foo\ $emailIf $email not defined$email\ $email\ \ $email\\\ $emailOutput:$email\ $email\ \ $email\ \ $email (front three slash , here two ) One．built-in object

As a widely used debugger under Unix/linux, GDB not only provides rich commands, but also introduces scripting support: one for existing scripting language support, such as Python, where users can write Python scripts directly, and GDB calls the Python interpreter to execute The other is a command script, in which the user can write GDB commands that GDB has prov

MYSQL Tutorial: UNIX Timestamp and date conversion function tip: UNIX timestamp to date using the function: FROM_UNIXTIME (), date to UNIX timestamp using the function: UNIX_TIMESTAMP (). function for converting UNIX timestamp to date: FROM_UNIXTIME () select FROM_UNIXTIME (