我们都知道从当前行往下删除 n 行很容易， ndd 就好了。但往上删除呢？ 我以前是不知道的，最近搜索了一下，找到了答案，而且额外学到了其他的技巧，你想听吗（不想听我也会写，哈哈
8dd其实是dd重复8次，容易记忆，但效率很低。正确的姿势是 7dj 或者 d7j。我想你看到这里已经猜到应该怎么向上删除了。如果打算从当前行往上删除n行，你需要 {n-1}dk 或者 d{n-1}k
故事到这里应该结束了，然而.... 试试 V3kd, V4jd，注意是大写的V。你会对vim的强大有更多的理解。
By the way, 如果你要从当前行删除到你知道行号的某一行，举例来说，你要从当前行一直删到第434行，无所谓是向上删还是向下删，用 d434G 就可以了。
ctrl + alt + -> root 登录即可设置默认用户的密码。想深入了解Linux了，所以又开始看 Linux From Scratch。
This will keep the local file for you, but will delete it for anyone else when they pull.
git rm cached
This is for optimization, like a folder with a large number of files, e.g. SDKs that probably won't ever change. It tells git to stop checking that huge folder every time for changes, locally, since it won't have any. The assume-unchanged index will be reset and file(s) overwritten if there are upstream changes to the file/folder (when you pull).
git update-index --assume-unchanged
This is to tell git you want your own independent version of the file or folder. For instance, you don't want to overwrite (or delete) production/staging config files.
git update-index --skip-worktree
It's important to know that git update-index will not propagate with git, and each user will have to run it independently.
I haven't used my old MBP 13 for nearly a month. This evening I picked it up and opened the iTerm2 then connected to my home server through ssh. I noticed I get a white-black colored terminal. What's wrong? I remembered it was colorful when I logged into this machine last time using iTerm2 on my MBP 15.
Firstly, I checked the version of iTerm2, it was a bit old, so I updated it first. Unfortunately, it doesn't help. I noticed I was using bash instead of zsh on this machine. So I ran chsh and changed the shell from bash to ssh. It also doesn't help. Then I find this answer from stackoverflow.com. A comment in this answer reminded me: I should check and compare the terminal configuration in iTerm2. So I found the secret!
Command + , open the preference, then click the profiles tab, then change the Report terminal type from xterm to xterm-256 color, that's it!
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services.AddScoped<SmsSentLogRepo>(s => new SmsSentLogRepo(Configuration.GetConnectionString("sms")));