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Since you did $(adduser ..) instead of simply adduser .., you apply command substitution and that line is replaced with the output of that command. So if adduser produces an output of Adding user ..., then the shell will try to execute Adding user ... as a command. Instead, do: id -u ${username} > /dev/null 2>&1 if [ $? -eq 1 ]; then echo ...


The wrong architecture refers to the type of processor your device is using. You have downloaded a deb file designed for a processor running the amd64 machine language, commonly referred to as a 64bit processor or an x86_64 processor. But either the processor you are using is not a 64 bit processor, or you have installed a version of Ubuntu not designed ...

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