Announcing YapStocks 2.0

Over the last few weeks, I’ve been working on a new plasmoid (KDE Plasma Applet) that provides a simple interface to monitor stocks. The first version was rather basic, being able to show the current market price only. Now it’s time to announce the availability of the second iteration of YapStocks (Yet Another Plasma Stocks Applet). I’ve recorded a short video clip showcasing all the features it has, ranging from the information summary to the historical price chart.

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Hands-on Sailfish OS on Redmi Note 7

Not sure if this is related to the COVID-19 lockdown, but we’ve seen a lot of geeky hobby projects coming up recently. A lot of community ports have been done over the last few months for niche mobile operating systems such as Sailfish OS. That’s exactly the one I played with briefly after purchasing a second-hand Redmi Note 7 on eBay (don’t ask me if I think it’s a waste of money now LOL).

If you come here hoping to find the resources, head to the GitHub repo directly where you can find the ROMs to download.

Make sure that you’ve unlocked the bootloader already! If not, you need to register a MI account and apply for unlocking here. You must log in to your MI account on both the unlocking tool and your phone (MI, POCO, RedMi). If you don’t have a Windows PC, I recommend using XiaoMiTool V2 which works on macOS, Linux, as well as Windows. Though I couldn’t find this on the official FAQ, you have to have a working SIM card inserted. You have to use the mobile data instead of WiFi when unlocking the bootloader on your phone because XiaoMi is doing some verification.

Another problem I encountered was that in fastboot mode, RedMi Note 7 would just say “Press any key to reboot” when any commands are sent from my laptop. After googling on this, there seems to be a driver bug that makes RedMi Note 7 fastboot USB3 unfriendly. Using a USB-Hub worked for most people, including me 🤷.

I wish you all a successful attempt to flash Sailfish OS into your RedMi Note 7. Here are some screenshots I took.

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OpenSUSE 15.1 Installation Notes

Although my personal laptop isn’t getting much attention from me because I’ve spent most of my time on my work laptop (a MacBook Pro) and my Android tablet (Samsung Galaxy Tab S5e), I’ve decided to take good care of its software over last weekend by wiping the SSD clean and installing a fresh OpenSUSE on it. As an old habit, I’m sharing some notes during the installation and later setup. This is, however, the first blog post written in English here (not counting the old ones on no-long-working en.librehat.com).

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VPS遷移日誌

上個週末得閒把VPS從之前的RamNode遷移到了Amazon Lightsail,主要遷移的內容就是WordPress,涉及到MySQL的導出和導入、Nginx的配置、PHP的配置(從5.6升級到了7.3)、CentOS的簡單設置(從6升級到了7)、Let’s Encrypt SSL證書的配置。下面簡單記載一下遷移的梗概以便有需要的訪客和自己今後查閱。

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适用于KDE Plasma 5的雅虎天气小部件

去年简单粗暴地把自己写的Yahoo! Weather从KDE 4移植到了Plasma 5,但是一直没有好好改进一下。前段时间雅虎停止旧API支持,被迫更新,就顺便改改了。应该访客里有不少KDE的用户吧,想要一个简单的天气小部件的可以试试看。

主要卖点

  • 纯QML,不用编译直接装
  • 雅虎天气接口,大品牌值得信赖
  • 自认还算简洁明了的UI
  • 支持不同的计量单位(温度、气压、风速等)
  • 10天天气预报

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在华硕Chromebook C201上安装Debian Jessie

网上有不少在Chromebook上安装Linux的脚本了,不过我个人还是比较偏向于手动一步步执行,天知道脚本是不是已经太老了或者某些具体情况不匹配。希望本文一来能对各位想要安装Linux的Chromebook持有者有所裨益,二来就和博客里其他文章一样,当作个人的备忘。另外需要说明的是安装Debian算是比较繁琐的,如果想要安装Arch的话,戳底下参考文章的链接,安装Arch可以很快就搞定(而且是在Chromebook上就能全部搞定)。至于为什么不安装我钟爱的Fedora,因为我个人感觉Fedora的ARM做得不是很好,担心出岔子。好了,废话不多说了,下面开始正文。

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调节ODROID-U3的CPU频率(Linux)

先提一下背景:我的ODROID-U3(跑的Linux)在用XBMC播放视频的时候,容易因为CPU一直较高负载而吃掉太多电压,导致USB接口供电不足致使移动硬盘“掉线”。今天试验了一下发现把CPU频率从默认的1.7GHz降到1.2GHz之后,移动硬盘没有再掉链子了,而且XBMC依然能流畅播放1080P视频。

懒得安装那些专门调节CPU的工具了,直接上最原始的办法(最原始但也最有效)。理论上对所有Linux发行版、所有架构都一样。

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Linux下驱动腾达Tenda W311E PCIe无线网卡

家里的有线网卡再一次被雷电烧坏了……这次干脆买了一张PCIe无线网卡,和路由器零接触,这下应该能放心不被雷击了……Orz

买的PCIe无线网卡型号是腾达W311E,在Windows下用附带的光盘安装好驱动就一切正常了,但是Linux下一看简直傻眼,芯片型号是(lspci命令查看):

Network controller: Broadcom Corporation Device 43aa (rev 01)

43aa我Google了大半天都没找到……不过总归是43xx吧,但是很遗憾,b43等开源驱动是无法识别这张网卡的。能用的只有Broadcom的闭源驱动wl和ndiswrapper模拟Windows XP的驱动。

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IPv6开启转发并保持自动获取PPP提供的IPv6地址

标题想了好久……请不要吐槽晦涩难懂

先说一下应用场景:

  • 一台Linux-based box(ARM开发板如ODROID U3、Raspberry Pi,或者OpenWRT神马的)当作Host + Router,通过有线网卡连接交换机Hub作为局域网网关和服务器,再通过PPPoE拨号连接外网(PPPoE能自动配置并获取IPv6地址)。
  • 局域网PC配置好本地的IPv6地址透过局域网网关(上面那台Linux Box)连接外网,要求能以IPv4和IPv6协议访问Internet,但是获得的IPv4和IPv6地址都是内网地址

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Linux下连接无线网络后拨号(即PPP over WiFi)

连接一个无线网络(例如一个当交换机的无线AP),然后ADSL拨号上网。这一个在Windows下很简单的事情,在Linux下却变得稍微有点麻烦,甚至让人不知所措。今天有空在Fedora下捣鼓了一把,发现其实相当简单,只不过得通过命令行式的操作而已,下面就拿来和大家分享一下。

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