How can I store away the *.deb files from var/cache/apt/archives directory for future installation in case I need to reinstall the OS in ubuntu 11.10. I tried copying and saving away but after OS reinstallation I tried reinstalling those deb files using "apt-get install file" but so many files were missed thought I copied everything. What am I missing, Please reply
Apt manager always install a software by reading source file which ontain list of packages,there dependency. These list file are updated when you run the update program (basically whenever you run the command
After a ubuntu re installation those source files aren't updated.So you can update them using
It is because those packages are updated with your previous installation of the software and now. Anyway in this case you have to download only the updated files. If the file hasn't updated it will take from your backup.You can see the required download size while installing.
You can use
Another thing you can do is to install using
Note: I have told what I understand about installation in ubuntu. Don't know whether any other method exists.