ramfs


Ramfs is a very simple FileSystem that exports Linux's disk cacheing mechanisms (the page cache and dentry cache) as a dynamically resizable ram-based filesystem.

ramfs 是一个基于linux缓存机制(page cache and dentry cache)的简易文件系统,基于ram,大小可动态调整。

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Overview of the V4L2 driver framework


This text documents the various structures provided by the V4L2 framework and their relationships.

The V4L2 drivers tend to be very complex due to the complexity of the hardware: most devices have multiple ICs, export multiple device nodes in /dev, and create also non-V4L2 devices such as DVB, ALSA, FB, I2C and input (IR) devices.

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systemd


systemd 是linux操作系统的系统和服务管理器,作为boot启动后的第一个进程(PID=1),systemd扮演初始化系统,以及启动和维护用户空间服务。

为了兼容SysV,如果systemd初始化被调用并且进程id不是1,它将执行telinit,并且将同步参数到该应用,所以在正常系统登录状态下的init和telinit是等同的。更多信息通过man telinit 了解。

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htpdate


标签 :GAC-350 htpdate

GAC-350 放弃ntpdate采用htpdate,通过/etc/default/htpdate配置为deamon模式,并且尝试从多个门户网站同步时间。但是测试反馈从开机无网络到网络恢复的时候同步时间未及时恢复,需要等待一段时间。

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