software installation - How does Ubuntu determine a package to be installed? - Ask Ubuntu


other extracting files specific package in proper directories , running whatever scripts defined in it, apt/dpkg maintain separate record of has been installed successfully?

i'm considering merging root directories of separate containers, i'm wondering what's going happen.

yes. dpkg records entries of packages installed in system. file maintains /var/lib/dpkg/status.

from man dpkg

/var/lib/dpkg/status       statuses  of  available packages. file contains information       whether package marked removing or  not,  whether         installed  or  not,  etc.  see section information       packages more info.        status file backed daily in /var/backups.   can        useful if it's lost or corrupted due filesystems troubles.

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