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104键美国英语PC键盘布局中System request键的位置

System request(有时缩写为SysRqSys Req)是在PC键盘上一个没有标准用途的按键[1]。该键的渊源,可以追溯到在System/370英语IBM System/370大型机上使用的IBM 3270英语IBM 3270型控制台键盘的操作终端键,令VM/370英语VM (operating system)MVS英语MVS等操作系统允许控制台将输入送给操作系统。

现代用途

可以配置Linux系统的内核来开启Magic SysRq组合键功能,通过SysRq键来调试系统内核或者可以在当机时恢复系统或数据[2]

微软的产品中也使用SysRq键来提供系统应用层面的调试功能。在CodeView英语CodeView调试器中,可以通过SysRq键来挂起被调试程序[3];在Windows NT的远程调试器中,可以通过SysRq键来使得系统在调试器中运行[4]

参见

参考文献

  1. ^ What is the SysRq key for?. comp.os.msdos.programmer FAQ. [2008-01-08]. (原始内容存档于2018-11-10). 
  2. ^ Linux Magic System Request Key Hacks. Linux kernel. [2018-06-21]. (原始内容存档于2018-06-21). 
  3. ^ Returning Control to CodeView. Microsoft Knowledge Base. [2008-01-08]. (原始内容存档于2008-11-08). 
  4. ^ How to enable a remote kernel debugger connection on a computer that is running Windows Server 2003 with Service Pack 1. Microsoft Knowledge Base. [2008-01-08]. (原始内容存档于2008-03-19). 
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