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#useradd -G actor romola
#useradd -G actor hooper
#passwd romola
#passwd hooper
#tail -2 passwd
romola:x:1025:1025::/home/romola:/bin/bash
hooper:x:1026:1026::/home/hooper:/bin/bash
#tail -3 group
actor:x:1010:romola,hooper
romola:x:1025:
hooper:x:1026: