1. 安装工具

#apt-get install dpkg-dev #这个比较全
apt-get install gnupg
apt-get install rng-tools

2. 搜集软件和依赖

# 查询依赖关系
root@localhost:~/df/packages# apt-cache depends nginx
nginx
 |Depends: nginx-core
 |Depends: nginx-full
 |Depends: nginx-light
  Depends: nginx-extras
 |Depends: nginx-core
 |Depends: nginx-full
 |Depends: nginx-light
  Depends: nginx-extras
# 下载
sudo rm -rf /var/cache/apt/archives/*  # 清空缓存目录，这一步也可以不做
sudo apt-get -d install <包名>
root@localhost:~/df/packages# sudo apt-get install --reinstall -d `apt-cache depends nginx | grep depends | cut -d: f2 |tr -d "<>"`
root@localhost:~/df/packages# sudo apt-get download `apt-cache depends nginx | grep depends | cut -d: f2 |tr -d "<>"`

3. 生成包索引文件和Release文件

mkdir -p /opt/repository
cd /opt/repository
cp -rf /path/to/*.deb /opt/repository
apt-ftparchive packages . > Packages
apt-ftparchive release . > Release

4. 生成签名

在ubuntu下做，在centos下做会有问题

1. gpg --gen-key #gpg --list-keys查看
2. gpg -a --export pub_id | apt-key add -  #apt客户端导入公钥
gpg -a --export username > username.pub  #导出公钥
apt-key add username.pub #导入公钥
gpg -a --export 5789843F6B61B0B4 | apt-key add -     #其中pub key可用gpg --list-keys查到
gpg --clearsign -o InRelease Release #gpg生成一个明文签名
gpg -abs -o Release.gpg Release　　#gpg生成一个分离签名

5. 更新apt源sources.list

vim /etc/apt/sources.list
添加 deb file:/opt/repository /

6. 客户端更新元数据

apt-get update