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My Nexus 5X bullhead is gone for good

TL;DR

The 13 months old Nexus 5X 32GB entered an infinite reboot loop, it has gone for good. LG != Life’s Good, it stands for Low (quality, standards) Goods really, avoid at any cost.

NOTE: My previ
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IT牛人.117 2017-04-25 18:30 | 查看: 3741

Why 370Z

TL;DR

I am going to buy a manual Nissan 370Z - the Fairlady.

Why 370Z?

Engine: VQ37VHR 3.7L V6 245kW/363Nm (redline @ 7500rpm). The best NA V6 engine, I lost count on how many times it has won Ward
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IT牛人.117 2017-03-14 18:30 | 查看: 77372

Linux 4.5

Linux 4.5 于 UTC-7 3月13日发布,代号是 Blurry Fish Butt。

Prominent features / 显著特性

copy offloading with new copy_file_range(2) system call

copy_file_range(2) 新系统调用,可避免在复制文件时通过用户空间传输数据的开销。该系统调用只比 cp 稍快,因为复制内
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IT牛人.117 2016-03-14 18:30 | 查看: 37593

Secure OpenSSH

I’ve been continuously learning OpenSSH (since 2006) and closely following its changes since version 6.7.

I personally consider start using Public Key Authentication and Host-based Authentication a m
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IT牛人.117 2016-02-10 18:30 | 查看: 59224

New iptables Gotchas - SNAT VS MASQUERADE

Story

As a heavy user of iptables NAT rules, (advanced home networking, various VPNs on EC2 and other IaaS providers), I feel it’s time for me to better understand how NAT works under the hood with t
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IT牛人.117 2016-02-02 14:01 | 查看: 14422

Mouse Support Change in tmux 2.1

tmux was updated to 2.1 on both Arch Linux (of course, it’s rolling!) back in October last year.

NOTE: homebrew for OS X was pretty quick, too.

I started to notice warnings when spawning the first t
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IT牛人.117 2016-02-01 08:56 | 查看: 23477

Jumbo Frame Support In XenServer

XenServer - In depth investigation series

Background

Jumbo frame is always tricky because there is no standard.

In XenServer environment, jumbo frame is often used for network (storage network) use
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IT牛人.117 2015-11-23 09:26 | 查看: 3680

e1000e NIC Driver change in Linux Kernel

Story

Intel PRO/1000 PCIe Network Driver in kernel source tree hasn’t been touched for quite some time, it’s been 2.3.2-k from 3.10 all the way up to 4.1.

Not until Linux 4.2 was it bumped up to 3.2
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IT牛人.117 2015-11-18 09:00 | 查看: 19359

WRT54G DD-WRT 内部架构

说到研究 RT-AC68U 工作原理,就不得不谈一下经典的 WRT45G / DD-WRT 了,两者的工作原理是非常相似的。

幸运地找到了迄今为止见过最好的内部工作原理图:

原理简述:

WRT54G 内部有三大组成部分

SoC – 路由器

一个6口交换机

无线模块

交换机端口划分成 port 0-3 (路由器上的 LAN 端口编号是不一样的)是本地局域网端口 port 4 是 WAN
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IT牛人.117 2015-07-12 10:00 | 查看: 26378

Asus RT-AC68U

财年末,按惯例升级工作相关的设备,今年着重解决家里的网络问题。

出口带宽的问题是解决了,详见 From ADSL2+ to Cable,但送的 NetGear CG3000v2 Cable Modem 的固件实在太差(硬件参数是不错),烂到了无法忍受的地步,最终把它改成了 Bridge 模式接了个破 TP-Link TL-WR1043ND 暂时用着,该有的功能都有了(比如保留 IP 地址,无线
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IT牛人.117 2015-06-27 18:00 | 查看: 34126

Linux 4.0

Linux 4.0 于 UTC-7 4月12日发布,代号是 Hurr durr I'ma sheep 看起来非常无厘头。

这是一次大版本升级,上一次从 2.6.39 跳到 3.0 还是2011年7月的事情,当时新特性非常给力,比如 Xen dom0 支持, Btrfs 自动 defragmentation / scrubbing 以及其它性能改进,还有 Wake on WLAN 支持等等。


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IT牛人.117 2015-04-13 14:30 | 查看: 27063

Linux 3.19

Linux 3.19 于2015年2月8日发布。

Linux 3.19 中的显著特性如下:

Btrfs RAID 5 & 6 scrubbing 和 fast device replacement 快速设备替换支持

详见 btrfs-scrub, btrfs-replace, btrfs-device 命令。

Intel Memory Protection Extension 支持
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IT牛人.117 2015-02-08 18:00 | 查看: 28043

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