Linux严格意义上说的是一个操作系统，我们称之为“核心（kernel）“ ，但我们一般用户，不能直接使用kernel。而是通过kernel的“外壳”程序，也就是所谓的shell，来与kernel沟通。 如何理解？为什么不能直接使用kernel？ 从技术角度，Shell的最简单定义：命令行解释 ...

A critical remote code execution vulnerability in Bash, present in almost all Linux, UNIX and Mac OS X deployments, has been discovered. Experts advise immediate patching. A critical vulnerability in ...

While Linux systems install with thousands of commands, bash also supplies a large number of “built-ins”—commands that are not sitting in the file system as separate files, but are part of bash itself ...

The shopt builtin offers 53 settings that can alter how bash behaves. Read this post and then refer to bash's man page to follow up on how these settings might work for you. If you haven’t tried it ...