2016.11.07 built blog with Hexo; theme: NexT

2017.01.11 create new [projects] page by setting it as one of the categories

1. edit the scaffolds/post.md (post template)

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title: {{title}}
date: {{date}}
tags: 
categories: 
---

1. writing a new post with header
   categories: projects
2. edit themes/_config.yml

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menu: 
	home: /
	projects: /categories/projects

1. setting page icon, language, etc.
   ref: https://www.zhihu.com/question/33324071

2017.01.12 change NeXT theme to be “mist”, works on localhost but not on the web
fixed by updating theme (git pull)
another option: hexo clean

适用类型：

• pem文件丢失
• 擅改home directory权限导致无法登录 （Note: 如果group拥有对home的写入及运行权限，ssh将无法登入，保险权限为700或755，详见这个问题下的讨论：http://unix.stackexchange.com/questions/37164/ssh-and-home-directory-permissions）

已有 Instance A
［Permission denied (publickey)］

解决办法：

1. 新建Instance B，基本设置与A相同。
2. 如果丢失 pem 文件，新建 key-pair 并下载pem文件
3. stop Instance A; 进入 volumn tab –> detach
4. volumn attach 到 B
5. 登入Instance B；在 root directory 下新建 mount point (ex: /vol-a) 并mount

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sudo mkdir /vol-a
sudo mount /dev/xvdj /vol-a

Note：volumn可能保存在 xvdj、xvdj1、xvda、sxda1、或 sdf

1. 进入 vol-a 作出所需修改
   *丢失pem文件：将正确的ssh key添加到：/vol-a/home/ubuntu/.ssh/authorized_keys

   • 更改home dir （或者 ec2-user）的权限至700
   • etc.

2. unmount

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sudo rmdir /vol-a

1. deatch volumn from Instance B; Attach back to Instance A.
   Start Instance A;
   Terminate Instance B.

参考：
https://alestic.com/2011/02/ec2-fix-ebs-root/
http://d2930476l2fsmh.cloudfront.net/LostKeypairRecoveryOfLinuxInstance.mp4
https://forums.aws.amazon.com/message.jspa?messageID=334402