bash computer

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Bash script code for obtaining computer hardware configuration information in Linux

Bash script code for obtaining computer hardware configuration information in Linux Recently, to obtain the hardware configuration information of Several Linux servers, I wrote a script code to obtain the hardware configuration information, including the number of cpu cores, memory size, and hard disk size, the Code is as follows: #! /Bin/bash## Description:# Use

Shellshock vulnerability review and analysis test

Shellshock vulnerability review and analysis test 0x00 vulnerability Overview Many may have a deep memory of the Heartbleed Bug in the first half of 2014. In September 2014, another "destruction-level" vulnerability-Bash software security vulnerability emerged. This vulnerability was discovered by Stéphane Chazelas, a French GNU/Linux enthusiast. Subsequently, the US computer emergency response center (US-C

Basic analysis of Linux operating system (vii)--bash (Shell) Basics (1)

In everyday English, the shell can be translated into shells, most of which means a device or structure that can protect the inner core. In computer science, the shell actually refers to a provider that can use the entire computer's resources through system calls or library calls.It is both a command parser and a programming language. As a command parser, it can interpret and execute user-entered commands, and can automatically interpret and execute a

Explains the security vulnerability process caused by bash Code injection.

Recently there has been a "destructive level" vulnerability--bash software security vulnerabilities. The loophole was discovered by French gnu/linux enthusiasts Stéphane Chazelas. Subsequently, the United States Computer Emergency Response Center (us-cert), Red Hat and a number of companies engaged in safety in Wednesday (Beijing time September 24) issued a warning. Details of this vulnerability are availab

LILO, LinuxCrashRescueHOW-TO (1)

linux system, this may damage the hard drive master. Boot Records (MBR) or LILO (Linux boot Loader ). When linux is caused by a hard drive failure This will occur when the instance cannot be started. If you accidentally re-partition the disk or Install Other operating systems on your computer, such as Windows 98/NT. LILO may also become invalid.    This document provides you with ideas, tips, and quick guidance to quickly reply to the system without

Linux Discovery Tour | Part V Lesson two: a shell deep like the sea, cool shell love

naming it test.sh.Specifies the shell to be used by the scriptPress Enter and the above command is executed. Vim was opened, and under our noses was an empty file.The first thing to do when writing a shell script is to specify which shell to use to "parse/run" it. The syntax of the Shell is different because of sh,ksh,bash and so on.Since we're going to use bash in our course, we'll write on the first line

Basic analysis of Linux operating system (vii)--bash basic knowledge and basic usage skills (1)

In everyday English, the shell can be translated into shells, most of which means a device or structure that can protect the inner core. In computer science, the shell actually refers to a provider that can use the entire computer's resources through system calls or library calls.It is both a command parser and a programming language. As a command parser, it can interpret and execute user-entered commands, and can automatically interpret and execute a

BASH Learning notes Summary _linux Shell

following table: The corresponding operation integer operation string operation Same-eq = Different-ne!= Greater than-GT > Less than-lt Greater than or equal to-ge Less than or equal to-le Is null-Z Not null-n Like what: Compare integers A and b for equality and write if [$a = $b] To determine if an integer A is greater than integer b, write if [$a-gt $b] Compare strings A and b for equality on writing: if [$a = $b] To determine if a string A is empty, write: if [-Z $a] To judge whether an int

BASH learning notes

operation Integer Operation string operationSame-eq =Different-ne! =Greater than-gt>Less than-lt Greater than or equal to-geLess than or equal to-leBlank-zNot empty-nFor example:If the integers a and B are equal, write if [$ a = $ B].To determine whether integer a is greater than integer B, write if [$ a-gt $ B].Compare whether the strings a and B are equal to write: if [$ a = $ B]To judge whether string a is null, write: if [-z $ a]To determine whether integer a is greater than B, write: if [$

Go to the Linux subsystem in Windows 10

his (well, mainly my toy ). I used to use several clients on my Windows 10 computer to manage it, but now I want to use the ssh command line in Bash in Windows to manage it. You can also use applications such as PuTTY or javasterm from Cygwin, but it is also a good choice to try a real native and natural experience. Cygwin is like a pizza ordered at a pizza shop. It's delicious, but it doesn't have that at

Linux Shell Scripting first experience _linux shell

Often, when people refer to the "Shell scripting language", they are bash,ksh,sh or other similar Linux/unix scripting languages emerging in their minds. Scripting languages are another way to communicate with a computer. Users can move the mouse and click on a variety of objects, such as buttons, lists, marquee, and so on, using a graphical window interface (regardless of whether it's Windows or Linux). Bu

Bash instance, Part 1: Exploring the ebuild System

executed. When user_compile () is executed,/etc/ebuild. conf has been executed, and "$ makeopts" has been set to the correct value. ConclusionThis article has already talked about many bash programming techniques, but it only involves some of the capabilities of bash. For example, Gentoo Linux ebuild not only automatically unpacks and compiles each package, but also: If no source code is found in "$ DIS

Bash Security Vulnerability threats are more likely than "heartbleed", with faster update!

650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M00/4A/2A/wKioL1QjgXjCgIliAAD8C0Av2tY574.jpg "Title =" 11.jpg" alt = "wkiol1qjgxjcgiliaad8c0av2ty574.jpg"/> According to foreign media reports, network security experts warned on Wednesday that a frequently-used section "bash" in open-source software Linux has recently discovered a security vulnerability, its threat to computer users may exceed the

20.1-20.4 Shell: script, script structure and execution, date usage, shell script variables

Tags: shell scripting variables Date usageWhat is 20.1 shell? The shell is the intermediate medium used when the system interacts with the computer hardware, and it is just a tool of the system. In fact, he has a layer of things between the shell and the computer hardware-the system hard core. If computer hardware is likened to a person's body, then

Linux/Unix logon script

within the system range. This means that modification affects all users on the system. This may not be a big problem on a personal computer, but modification also requires root permissions. For these reasons, each individual Bash user account can be created ~ /. Bash_profile ,~ /. Bash_login and ~ /. Profil any of these files serves as the source of the Bash con

Basic usage of the shell

Tags: bashSHELL:An interface program that completes the interactive operation between the user and the operating system, providing the user with simplified operation;In the middle of the 70 's, Bell Lab, Bourne;bourne Shell, abbreviated Sh;bill JOY:C Shell, referred to as CSH;TCSH for its derivative version; David korn:korn Shell, abbreviated Ksh;gnu:bourne Again Shell, referred to as the default shell program in the Bash;linux system; ZSH: The final

Some of their common shell scripts share _linux Shell

$i computer is" Ping-c 1 192.168.0. $i Done 9. If the size of the Test.log is greater than 0, then the *.tar.gz file in the/opt directory Copy Code code as follows: #/bin/sh a=2 While Name= "Test.log" Todo Sleep 1 b=$ (ls-l $name | awk ' {print $} ') if test $b-ge $a #then echo "OK" Then ' cp/opt/*.tar.gz. ' Exit 0 Fi Done 10. Print the Read content, prepare for the following example Co

Docker data volume and data container detailed introduction and example _docker

Docker data volumes and data containers These two days began to learn Docker, found that Docker is really strong, so that the site deployment and maintenance efficiency greatly improved. So ready to be on hand to maintain a few station, all Docker. It is felt in the process of finishing that Docker can be deployed and maintained in a functional or process unit, without having to spend more time on cumbersome configuration, but the data sharing between Docker and the host and the sharing of data

Bash remote parsing command execution vulnerability Test Method

Bash remote parsing command execution vulnerability Test Method Since yesterday, the BASH remote command execution vulnerability from a vast ocean of Australia has boiling the entire FreeBuf. Everyone is talking about it, "The Heart of the Internet is bleeding again, how can I test my website? The following script $ env x=‘() { :;}; echo vulnerable' bash -c "ec

First knowledge of the shell

What is the shell? Believe that as long as touch the computer, for the operating system (whether Linux, Unix or Windows) a little concept of friends have heard the term, because as long as there is an operating system, it is inseparable from the Shell of this thing. The management of Linux often need to go online, while online text interface transmission speed must be relatively fast, and less prone to disconnection or information outflow problem. Man

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