How to create the local source of the UbuntuLinux Operating System

Article Title: how to create the local source of the UbuntuLinux operating system. Linux is a technology channel of the IT lab in China. Some basic classification methods, such as desktop applications, Linux system management, kernel research, embedded systems, and open source, are the easiest way to create local sources:
　
There are two types of packages in the packs Folder: one is. Deb package (full dependency package and Software Package)
　
The second type of package includes the list of required software packages and dependency information.
　
This package is generated later. It is generated using the following command:
　
Sudo dpkg-scanpackages packs/dev/null | gzip> packs/Packages.gz ### packs contains the folder of all software packages. This command is executed in a directory on the pakcs folder. Packages.gz is generated in the packs folder.
　
1. Copy all packages in packs to the/var/cache/apt/archives/directory.
　
Command:
　
Sudo cp ~ /Packs/*. deb/var/cache/apt/archives/
　
Sudo chmod 777-R/var/cache/apt/archives/
　
2. Create such a directory under the/media directory:
　
Create gutsy and create packs under gutsy ### note that all files are folders
　
Copy packages.gz to packs and grant the permission.
　
Command:
　
Sudo mkdir/media/gutsy
　
Sudo mkdir/media/gutsy/packs
　
Sudo cp ~ /Packages.gz/media/packs/
　
Sudo chmod 777-R/media/gutsy/
　
Sudo chmod 777-R/var/cache/apt/archives/
　
After completing the preceding operations, run the following command:
　
3. sudo gedit/etc/apt/sources. list
　
Enter the sources. list file, clear the content in the file, and fill in the following line:
　
Deb file: // media/gutsy packs/
　
After the three steps are completed, the local source is created.
　
Run
　
Sudo apt-get update
　
After sudo apt-get dist-upgrade, everything is normal.
　
Sudo apt-get install XXX ### install any software package you need, provided that it is in the local source.
　
NOTE: If your local source is still being improved and some packages need to be updated and added continuously, in order not to delay your use, when you can connect to the Internet, you can use the following two apt sources as a supplement:
　
Http://debian.ustc.edu.cn/ubuntu/ gutsy main restricted universe multiverse
　
Deb http://debian.ustc.edu.cn/ubuntu/ gutsy-backports main restricted universe multiverse
　
Deb http://debian.ustc.edu.cn/ubuntu/ gutsy-proposed main restricted universe multiverse
　
Deb http://debian.ustc.edu.cn/ubuntu/ gutsy-security main restricted universe multiverse
　
Deb http://debian.ustc.edu.cn/ubuntu/ gutsy-updates main restricted universe multiverse
　
Deb-src http://debian.ustc.edu.cn/ubuntu/ gutsy main restricted universe multiverse
　
Deb-src http://debian.ustc.edu.cn/ubuntu/ gutsy-backports main restricted universe multiverse
　
Deb-src http://debian.ustc.edu.cn/ubuntu/ gutsy-proposed main restricted universe multiverse
　
Deb-src http://debian.ustc.edu.cn/ubuntu/ gutsy-security main restricted universe multiverse
　
Deb-src http://debian.ustc.edu.cn/ubuntu/ gutsy-updates main restricted universe multiverse
　
Http://mirror.bjtu.edu.cn/ubuntu/ gutsy main restricted universe multiverse
　
Deb http://mirror.bjtu.edu.cn/ubuntu/ gutsy-updates main restricted universe multiverse
　
Deb http://mirror.bjtu.edu.cn/ubuntu/ gutsy-security main restricted universe multiverse
　
Deb http://mirror.bjtu.edu.cn/ubuntu/ gutsy-backports main restricted universe multiverse
　
Deb http://mirror.bjtu.edu.cn/ubuntu/ gutsy-proposed main restricted universe multiverse
　
Deb-src http://mirror.bjtu.edu.cn/ubuntu/ gutsy main restricted universe multiverse
　
Deb-src http://mirror.bjtu.edu.cn/ubuntu/ gutsy-updates main restricted universe multiverse
　
Deb-src http://mirror.bjtu.edu.cn/ubuntu/ gutsy-security main restricted universe multiverse
　
Deb-src http://mirror.bjtu.edu.cn/ubuntu/ gutsy-backports main restricted universe multiverse
　
Deb-src http://mirror.bjtu.edu.cn/ubuntu/ gutsy-proposed main restricted universe multiverse
　
Command
　
Sudo gedit/etc/apt/sources. list
　
Add the above two sources to the sources. list file, save and exit.
　
Sudo apt-get update
　
Sudo apt-get dist-upgrade