下面来讲解如何在 Linux 服务器上制作密钥对，将公钥添加给账户，设置 SSH，最后通过客户端登录。
1. 制作密钥对
首先在服务器上制作密钥对。首先用密码登录到你打算使用密钥登录的账户，然后执行以下命令：
[root@host ~]$ ssh-keygen <==建立密钥对 #或生成pem:ssh-keygen -t rsa -f my.pem -C "your@email.com"Generatingpublic/private rsa key pair.Enter file in which to save the key (/root/.ssh/id_rsa):<==按EnterCreated directory '/root/.ssh'.Enter passphrase (empty forno passphrase):<==输入密钥锁码，或直接按Enter留空Enter same passphrase again:<==再输入一遍密钥锁码Your identification has been saved in/root/.ssh/id_rsa.<==私钥Yourpublic key has been saved in/root/.ssh/id_rsa.pub.<==公钥The key fingerprint is:0f:d3:e7:1a:1c:bd:5c:03:f1:19:f1:22:df:9b:cc:08 root@host
I needed to run LSI MegaRaid Storage Manager (vivaldiframework) for my LSI 9260-8i SAS card in my Ubuntu Desktop. Ubuntu is based on Debian so this may also work to get LSI MegaRaid Storage Manager on Debian as well, but I have not yet tried it yet. It took some work but I go it to install so I thought I would tell you how I did it. It is assumed that in the following, when editing a file you are doing it with superuser rights such as opening the files from the comand prompt with "sudo nano /path/to/file/file" or "sudo vi /path/to/file/file"
I found that you need to have a GUI installed (though the install can be done completely by ssh.
root account:
If the root account has not been enabled, it will need to be enabled and have a pasword set
sudo passwd root
sudo passwd -u root
Install prerequisites:
sudo apt-get install alien libstdc++5 rcconf
You also need to install at least Java 7, I am using Java8. I followed the procedure found at: html" target="_blank" rel="nofollow">http://www.ubuntugeek.com/how-to-install-oracle-java-7-in-ubuntu-12-04.html and just changed java7 in the command line to java8
You need to download the Linux build from LSI (http://www.lsi.com/support/pages/download-results.aspx?component=Storage+Component&productfamily=RAID+Controllers&productcode=P00066&assettype=Management+Software+and+Tools&productname=MegaRAID+SAS+9260-8i). I initially tried the latest but had some problems with it. It could very well have been a fluk but I just went back to the 13.11.01.00 version that worked just fine.
FROM ubuntu:trusty
ENV VER 3.0.0
ENV TARBALL http://download.redis.io/releases/redis-$VER.tar.gz# ==> Install curl and helper tools...
RUN apt-get update
RUN apt-get install -y curl make gcc
# ==> Download, compile, and install...
RUN curl -L $TARBALL | tar zxv
WORKDIR redis-$VER
RUN make
RUN make install
#...# ==> Clean up...
WORKDIR /
RUN apt-get remove -y --auto-remove curl make gcc
RUN apt-get clean
RUN rm -rf /var/lib/apt/lists/* /redis-$VER
#...
CMD ["redis-server"]
结合注释，读起来并不困难，用到的都是常规的几个命令，简要介绍如下：
FROM：顶头写，指定一个基础镜像，此处基于 ubuntu:trusty
ENV：设置环境变量，这里设置了 VER 和 TARBALL 两个环境变量
RUN：最常用的 Dockerfile html" target="_blank">指令，用于运行各种命令，这里调用了 8 次 RUN 指令
WORKDIR：指定工作目录，相当于指令 cd
CMD：指定镜像默认执行的命令，此处默认执行 redis-server 命令来启动 redis
执行构建：
$ docker build -t redis:lab-1.
注：国内网络，更新下载可能会较慢
查看大小：
动辄就有 300多 M 的大小，不能忍，下面我们开始一步步优化。
步骤 2: 优化基础镜像
方法：选用更小的基础镜像。
常用的 Linux 系统镜像一般有 ubuntu、centos、debian，其中debian 更轻量，而且够用，对比如下：
这里我们可以看到有"The server could not connect to the client to verify the domain"的错误提示信息，包括也有其他提示错误，"The server experienced an internal error :: Error creating new registration"我们在邮局的时候不要用国内免费邮局。所以，如果我们是海外域名就直接先用域名自带的DNS。
最近把我的OVH独服重装了下，打算用Proxmox开点VM来用，省得一直吃灰（雾，安装很简单，毕竟是OVH提供的模板，但是，这玩意每次登陆都会有个蛋疼的提示（You do not have a valid subscription for this server. Please visit www.proxmox.com to get a list of available options.），而且找了半天没找到有关的地方，然后去官网看了下订阅的价格，呵呵呵，我还是自己想办法吧……
