mac OS

Using a handy network feature built into OS X and supported by most modern Macs, you can remotely wake a Mac from sleep using an iPhone (or iPod touch, iPad, and Android too). This is done using something called Wake On LAN (WOL), and it’s easy to set up in Mac OS X and use from a smartphone with the help of a free app. The result is basically the total opposite of the remote sleep tricks we’ve covered before, and instead of remotely sleeping a machine, you can remotely wake it instead, having the Mac ready for general network access or just quicker use. Let’s go over how to set this up.
First: Set Up the Mac for Wake On LAN Support

Enabling Wake On LAN support on supported Macs is simple:

Make sure the Mac is connected to a network
Open System Preferences from the  Apple menu and go to “Energy Saver” control panel
Go to the “Power Adapter” tab and check the box for “Wake for Wi-Fi network access” (may be “Wake for network access” if device has multiple networking options) – this enables Wake On LAN in OS X

Enable Wake On LAN in Mac OS X
Now go back to the primary System Prefs window and choose “Network”
Select ‘Wi-Fi’ from the sidebar and note the machines IP address provided to the right

If you don’t see the “Wake for network access” option in the Energy Saver control panel, the Mac probably does not support the feature.

It is also possible to get the Mac’s IP address from the Sharing control panel or command line, you will need this to match the ID of the Mac in question when you’re setting up WOL from iOS in a moment.
Second: Configure the iPhone App for Waking the Mac

Now you’ll want to preconfigure the iOS app (or Android app, more on that below) to have the Macs network information on hand, allowing for the remote wake trick to be used:

Download an iOS app with WOL (Wake On LAN) support – Fing is multi-use and free which is what we’ll cover here (we like it for other uses too), but Mocha WOL is also free and does the job, or you can use a paid app like NetStatus
Join the same wi-fi network as the Mac, then run Fing and tap the refresh button to scan the network and locate the Mac you want to wake up
Select the Mac based on IP address, and give it a name, like “Wake On LAN Home”
Scroll down and tap on “Wake On Lan” (yes do this even though the Mac is not yet asleep) – now the Mac should be saved in the list based on the hardwares MAC address, even if the IP address changes

Using Wake On LAN in iOS

brew raw.githubusercontent.com port 443: Connection refused

方案一：（主流方案）

查找 ip -> 修改 host -> 再去执行安装脚本 （有可能还是失败）

在 https://www.ipaddress.com/ 查询raw.githubusercontent.com的真实IP。

sudo vim /etc/hosts

添加如下内容：
199.232.28.133 raw.githubusercontent.com （前面的ip为查询到的 ip地址）

最近安装 Homebrew 遇到的坑，总结一下。
我的 Mac 版本是 10.13.6。

1. 首先安装 Homebrew

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

• 报错信息:

fatal: unable to access 'https://github.com/Homebrew/brew/': Could not resolve host: github.com
Failed during: git fetch origin master:refs/remotes/origin/master --tags --force

2. 解决方式:
   1. 试着先在终端 ping github.com
   MacBook-Pro:~$ ping github.com PING github.com (13.250.177.223): 56 data bytes Request timeout for icmp_seq 0 Request timeout for icmp_seq 1 Request timeout for icmp_seq 2 Request timeout for icmp_seq 3
   • 如果 ping 出来是这种结果，就接着看第二步
   2. 修改 hosts 配置
      • 在终端中 sudo vi /etc/hosts 打开编辑文件
      • 按 s 进入编辑模式
      • 接着在最下面添加 192.30.253.113 github.com
      • 按 control + c 保存
      • 接着按 :wq 退出，就可以了。
   3. 在终端 ping github.com MacBook-Pro:~$ ping github.com PING github.com (192.30.253.113): 56 data bytes 64 bytes from 192.30.253.113: icmp_seq=0 ttl=49 time=351.766 ms 64 bytes from 192.30.253.113: icmp_seq=1 ttl=49 time=388.017 ms 64 bytes from 192.30.253.113: icmp_seq=2 ttl=49 time=391.047 ms 64 bytes from 192.30.253.113: icmp_seq=3 ttl=49 time=408.031 ms
   • 就会发现已经成功了。
   4. 接着就在执行 /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
   5. 如果安装过程中遇到这种问题 error: RPC failed; curl 56 LibreSSL SSL_read: SSL_ERROR_SYSCALL, errno 54 fatal: The remote end hung up unexpectedly
   • 就是网络有问题，在执行一下安装命令
   achang@achangMacBook-Pro:~$ /usr/bin/ruby -e "$(curl - fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" ==> This script will install: /usr/local/bin/brew /usr/local/share/doc/homebrew /usr/local/share/man/man1/brew.1 /usr/local/share/zsh/site-functions/_brew /usr/local/etc/bash_completion.d/brew /usr/local/Homebrew Press RETURN to continue or any other key to abort ==> Downloading and installing Homebrew... remote: Counting objects: 106166, done. remote: Compressing objects: 100% (26/26), done. remote: Total 106166 (delta 21), reused 27 (delta 14), pack-reused 106125 Receiving objects: 100% (106166/106166), 24.11 MiB | 161.00 KiB/s, done. Resolving deltas: 100% (77467/77467), done. From https://github.com/Homebrew/brew * [new branch] master -> origin/master * [new tag] 0.1 -> 0.1 * [new tag] 0.2 -> 0.2 * [new tag] 0.3 -> 0.3 * [new tag] 0.4 -> 0.4 * [new tag] 0.5 -> 0.5 * [new tag] 0.6 -> 0.6 * [new tag] 0.7 -> 0.7 * [new tag] 0.7.1 -> 0.7.1 * [new tag] 0.8 -> 0.8 * [new tag] 0.8.1 -> 0.8.1 * [new tag] 0.9 -> 0.9 ... * [new tag] 1.6.1 -> 1.6.1 * [new tag] 1.6.10 -> 1.6.10 * [new tag] 1.6.11 -> 1.6.11 ... * [new tag] 1.6.8 -> 1.6.8 * [new tag] 1.6.9 -> 1.6.9 * [new tag] 1.7.0 -> 1.7.0 * [new tag] 1.7.1 -> 1.7.1 HEAD is now at dce6b875c Merge pull request #4581 from reitermarkus/non-existent-download-strategies ==> Tapping homebrew/core Cloning into '/usr/local/Homebrew/Library/Taps/homebrew/homebrew-core'... remote: Counting objects: 4808, done. remote: Compressing objects: 100% (4590/4590), done. remote: Total 4808 (delta 57), reused 839 (delta 27), pack-reused 0 Receiving objects: 100% (4808/4808), 3.90 MiB | 14.00 KiB/s, done. Resolving deltas: 100% (57/57), done. Tapped 2 commands and 4593 formulae (4,849 files, 12.2MB).
   • 安装完成了。