cut: 取出user.txt的第二个字段（密码明文），将结果输出到stdout；openssl: 将stdin中输入的数据（3条密码明文）使用SHA512形式进行hash，输出到stdout；paste: 将user.txt中的原始内容与hash过的密码组合起来，输出到stdout；tr: 去除可能出现的\r符号；awk: 从stdin中提取出用户名、hash过的密码、注释字段，将结果输出到passwd.txt。OpenSSL 的帮助命令可以看出当前的 openssl 命令支持哪些加密方式。
IaaS指提供系统（可以自己选）或者储存空间之类的硬件，软件要自己手动装；PaaS提供语言环境和框架（可以自己选）；SaaS只能使用开发好的软件（卖软件本身）；BaaS一般类似于非关系数据库，但各家不通用，有时还有一些其它东西。
| server { | |
| listen 8080; | |
| resolver 8.8.8.8; | |
| location ~* ^/cdn/discordapp/(.*)$ { | |
| proxy_set_header Host 'cdn.discordapp.com'; | |
| proxy_set_header Accept-Encoding $http_accept_encoding; | |
| proxy_pass https://cdn.discordapp.com/$1; | |
| } |
| #!/bin/bash | |
| mkdir -p /data/workspace | |
| cd /data/workspace | |
| env PYTHONDONTWRITEBYTECODE=1 | |
| apt-get -y install -qq aria2 | |
| apt-get -y install -qq libcairo2-dev | |
| apt-get -y install -qq python3-dev |
| #!/bin/bash | |
| yum install -y unzip curl java-1.8.0-openjdk | |
| if [[ -d /dev/shm ]]; then | |
| TMP_DIR=/dev/shm | |
| else | |
| TMP_DIR=/tmp | |
| fi |
| #!/bin/bash | |
| yum install -y epel-release | |
| yum install -y gcc gcc-c++ glibc glibc-devel curl git \ | |
| libffi-devel sqlite-devel bzip2-devel bzip2 readline-devel | |
| curl -L https://github.com/pyenv/pyenv-installer/raw/master/bin/pyenv-installer | /bin/bash | |
| cat <<EOF >> $HOME/.bashrc | |
| # Load pyenv automatically by adding | |
| # the following to ~/.bash_profile: | |
| export PATH="/root/.pyenv/bin:\$PATH" |
| <!doctype html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"> | |
| <title>reveal.js</title> | |
| <link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/hakimel/reveal.js@master/dist/reset.css"> | |
| <link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/hakimel/reveal.js@master/dist/reveal.css"> |
| version: '2' | |
| services: | |
| ## Router | |
| router01: | |
| image: mongo:4.2 | |
| container_name: rydell-router-01 | |
| command: mongos --port 27017 --configdb rs-config-server/configsvr01:27017,configsvr02:27017,configsvr03:27017 --bind_ip_all | |
| ports: | |
| - 27117:27017 |
| yum install -y dnf dnf-core-plugins | |
| dnf install -y https://rpms.remirepo.net/enterprise/remi-release-7.rpm | |
| find /etc/yum.repos.d/ -name "remi*.repo" | xargs sed -i "s/#baseurl/baseurl/g" | |
| find /etc/yum.repos.d/ -name "remi*.repo" | xargs sed -i "s/mirrorlist/#mirrorlist/g" | |
| find /etc/yum.repos.d/ -name "remi*.repo" | xargs sed -i "s@http://rpms.remirepo.net@https://mirrors.tuna.tsinghua.edu.cn/remi@g" | |
| dnf install -y php74-php php74-php-pear php74-php-cli php74-php-pecl-zip unzip \ | |
| php74-php-gd php74-php-dba php74-php-dbg php74-php-fpm php74-php-gmp php74-php-pdo \ | |
| php74-php-xml php74-php-imap php74-php-json php74-php-devel php74-php-bcmath \ | |
| php74-php-pgsql php74-php-sodium php74-php-xhprof php74-php-mysqlnd php74-php-process \ |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>My Presentation</title> | |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/> | |
| <style type="text/css"> | |
| .red { color: red } | |
| </style> | |
| </head> | |
| <body> |