Linux Mint based on Debian
LMDE
The Linux Mint Debian Edition (LMDE) uses Debian Stable as the software source base rather than Ubuntu. LMDE was originally based directly on Debian's Testing branch, but is designed to provide the same functionality and look and feel as the Ubuntu-based editions. LMDE has its own package repositories.
LMDE claims certain advantages and disadvantages compared to 'Mint Main' (i.e., the Ubuntu-based editions):
LMDE is faster and more responsive than Ubuntu-based editions.
LMDE requires a deeper knowledge and experience with Linux and Debian package management.
Debian is less user-friendly and desktop-ready than Ubuntu, with some rough edges.
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