--force-confold

Avoiding the conffile prompt
Every time that dpkg must install a new conffile that you have modified (and a removed file is only a particular case of a modified file in dpkg’s eyes), it will stop the upgrade and wait your answer. This can be particularly annoying for major upgrades. That’s why you can give predefined answers to dpkg with the help of multiple --force-conf* options:

--force-confold: do not modify the current configuration file, the new version is installed with a .dpkg-dist suffix. With this option alone, even configuration files that you have not modified are left untouched. You need to combine it with --force-confdef to let dpkg overwrite configuration files that you have not modified.
--force-confnew: always install the new version of the configuration file, the current version is kept in a file with the .dpkg-old suffix.
--force-confdef: ask dpkg to decide alone when it can and prompt otherwise. This is the default behavior of dpkg and this option is mainly useful in combination with --force-confold.
--force-confmiss: ask dpkg to install the configuration file if it’s currently missing (for example because you have removed the file by mistake).
If you use Apt, you can pass options to dpkg with a command-line like this:

$ apt-get -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" dist-upgrade

Source: raphaelhertzog.com

Similar codes

0 vote115 views1 answer
Bash continue on error
Shell/Bash
1 vote108 views1 answer
Npm steps
Shell/Bash
0 vote124 views1 answer
Git move branch to previous commit
Shell/Bash
0 vote123 views1 answer
How to scp without one file type
Shell/Bash
0 vote116 views4 answers
Office 365 for ubuntu
Shell/Bash
0 vote148 views1 answer
Install solidity compiler command with version
Shell/Bash
1 vote118 views1 answer
Linux move files one directory up
Shell/Bash
4 votes133 views1 answer
Add image to docker hub
Shell/Bash
1 vote134 views3 answers
Linux remove lines from file
Shell/Bash
2 votes123 views1 answer
Search by message git
Shell/Bash