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There is a utility called update-passwd that appears to do this safely for you: NAME update-passwd - safely update /etc/passwd, /etc/shadow and /etc/group SYNOPSIS update-passwd [options] DESCRIPTION update-passwd handles updates of /etc/passwd, /etc/shadow and /etc/group on running Debian systems. It compares the ...


See /etc/adduser.conf: # FIRST_SYSTEM_[GU]ID to LAST_SYSTEM_[GU]ID inclusive is the range for UIDs # for dynamically allocated administrative and system accounts/groups. # Please note that system software, such as the users allocated by the base-passwd # package, may assume that UIDs less than 100 are unallocated. FIRST_SYSTEM_UID=100 LAST_SYSTEM_UID=999 ...


In Linux (and Unix in general), there is a SuperUser named root. The Windows equivalent of root is the Administrators group. The SuperUser can do anything and everything, and thus doing daily work as the SuperUser can be dangerous. You could type a command incorrectly and destroy the system. Ideally, you run as a user that has only the privileges needed for ...


You should be able to use the instructions here for this. The only difference; you will be mounting your new partition as you say in 3.

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