How to restrict which applications are available to install

In case you want to ensure only specific applications are installed from XtraDeb.

There are several ways to do this. In this example, we configure apt to only install/update FreeFileSync from our repos.

sudo tee -a /etc/apt/preferences.d/xtradeb.pref <<EOF
Package: *
Pin: release o=LP-PPA-xtradeb-*
Pin-Priority: -10

Package: freefilesync
Pin: release o=LP-PPA-xtradeb-*
Pin-Priority: 999
EOF

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You can authorize additional apps by appending them in the “Package: freefilesync” line, comma separated.

 How to