What does a bash leak mean?

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?

Bash is a Unix shell written for the GNU program. Its name is a series of abbreviations: Bourne-again shell-This is a pun on the Bourne SHell (SH) (Bourne again/born Again). The Bourne shell is an early, important shell, written by Steve Burn around 1978, and released with version 7 Unix. Bash was created by Blaine Fox in 1987. In 1990, Chet Ramey became a major defender.

Bash is the default shell for most Linux systems and Mac OS X v10.4, it can run on most UNIX-style operating systems, and even ported to Cygwin systems on Microsoft Windows. To implement the POSIX virtual interface for Windows. In addition, it was ported to MS-DOS by the DJGPP project.

In the September 2014, several network security experts found a bug that had been hidden in the network for 20 years, a vulnerability called bash more serious than a "heart bleed" vulnerability. Hackers can use it to remotely send instructions to the Web server, which means that the affected company will be in big trouble.

So, at the moment, Bash is a security vulnerability that allows hackers to issue remote commands to a network server. Because this bug allows the hacker to instruct the server to do whatever he wants to do, the privacy information is easily stolen from the affected server.

　　Bash Solution:

1, download the latest patch for repair, the method is:

2. Run the command on the machine:

$ env x= ' () {:;}; echo vulnerable ' bash-c ' echo this is a test

If you return the following: Please upgrade as soon as possible.

Vulnerablethis is a test at present the official has provided the upgrade package please run: Yum update-y bash for upgrade processing!

　　What does bash mean?

Bash is an English word that literally means: bash, bash, bash, threatening criticism, etc.

But bash is usually the acronym for the borne again shell, a kind of shell that defaults to bash when you type the bash command at the command line, which is the equivalent of entering a bash environment, if it's a bash environment, Then you go into a child bash environment, which is equivalent to opening a subprocess.