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일부 터미널 코드를 해독하려고 합니다.

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일부 터미널 코드를 해독하려고 합니다.

-a은 무슨 -G뜻인가요? 감사해요.

sudo usermod -a -G www-data username

답변1

에서 man usermod:

   -a, --append
       Add the user to the supplementary group(s). Use only with the -G option.

   -G, --groups GROUP1[,GROUP2,...[,GROUPN]]]
       A list of supplementary groups which the user is also a member of. Each group is separated from the next by a comma, with no
       intervening whitespace. The groups are subject to the same restrictions as the group given with the -g option.

       If the user is currently a member of a group which is not listed, the user will be removed from the group. This behaviour can be
       changed via the -a option, which appends the user to the current supplementary group list.

즉, 사용자를 그룹에 sudo usermod -aG www-data username추가합니다 .usernamewww-data

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