So the question is: What are environment variables, like the executable PATH, and how can I change and use them on major operating systems? A good answer would include a simple explanation of …

In layman's terms, a path (or the search path) is the list of directories that will be searched for anything that you type on the command line. If you type in a built-in command like ls, it will look for a specified …

Jun 16, 2010 · What does "/" , "./", "../" represent while giving path? Let's be precise: "/"is a path which begins with a /, and thus it is an absolute path. Thus, we need to begin in the root of the file system …

如图，系统是找不到可执行文件 cmder.exe 的，所以我们要设置环境变量，下面开始设置。 按一下 win 键， 输入 环境变量，点击 编辑系统环境变量, 弹出的窗口依次点击： 高级 -- 环境变量 ，然后双击 …

What does the ~ mean in an absolute file path? I see this in the output of things like build scripts but the path does not exist.

Jan 13, 2016 · What is this "export" phrase at the start? export is a command (more precisely it's a Bash builtin, i.e. it's not an executable present in PATH, it's a command that Bash has built-in in itself). Is it …

May 24, 2012 · PATH is a global operating system variable that contains names of files that are to be executed without specyfing the whole path to them. For example You can just write startx to start …

Jul 22, 2009 · A path set in .bash_profile will only be set in a bash login shell (bash -l). If you put your path in .profile it will be available to your complete desktop session.

Sep 29, 2011 · In Windows 7, when I start the Command prompt, is there any command to display the contents of an environment variable (such as the JAVA_HOME or PATH variables)?

Dec 11, 2012 · Many programming tutorials ask users to add something to their PATH but don't explain what it is. The existing resources that explain the PATH to users new to the command line are not …