Simply put, environment variables are variables that are set up in your shell when you log in. They are called “environment variables” because most of them affect the way your Unix shell works for you ...

摘要：程序员都知道，Linux 不是 Unix，不过二者之间确实存在关系，即 Linux 系统是从 Unix 派生出来的，而 Linux是一个类 Unix 的操作系统。那么，二者之间具体存在哪些明显的差异呢？ 网上很多有关POSIX和Unix工具的教程和指南总是假设你安装了Linux，或者更具体地 ...

She describes herself as "USL" (Unix as a second language) but remembers enough English to write books and buy groceries. She lives in the mountains in Virginia where, when not working with or writing ...

Learn the ABCs of BSD.