UNIX简化形成了Linux；Linux则是Android的内核；而苹果则是使用UNIX系统作为ios和macos的内核。 1969年，贝尔实验室的研究员肯•汤普森，编写了一款计算机游戏Space Travel，先后在多个系统上运行，然而效果不理想，所以决定自己开发操作系统，就这样UNIX诞生了。

The use of the Linux operating system is becoming more common throughout the IT industry. Many corporate IT departments are using Linux to complement existing Unix systems using special-purpose Linux ...

Columnist Dave Taylor reminisces about the early days of UNIX and how Linux evolved and grew from that seed. Twenty five years of Linux Journal. This also marks my 161st column with the magazine too, ...

对于一台电脑来说，如果说出色的硬件是它的“身体”的话，那么系统就是它的"灵魂"，安装了操作系统用户才能使用电脑来进行各种各样的操作。 就目前来讲，Windows依然是PC机里面使用最多的系统，当然除了Windows之外，还有一些其它非常优秀的操作系统。

You can use the stat command to view dates and times associated with Linux files, and the date command can do some handy conversions if you’d like to display the current time in the epoch format.

Unix, the core server operating system in enterprise networks for decades, now finds itself in a slow, inexorable decline. IDC predicts that Unix server revenue will slide from $10.2 billion in 2012 ...