????Linux???/?????????????
????1?????????
????adduser phpq                             //???phpq???
????passwd phpq                               //??phpq???????????
????2??????????
????groupadd test                          //???test??????
????3???????????????????
????useradd -g test phpq                      //???phpq??????????test??????
?????????-g ?????? -d ???? -s ?????SHELL
????4???????е?????????????
????usermod -G groupname username
?????????gpasswd -a user group
????5?????????
????/etc/shadow????????????????е???????Σ???????????*?????????????????????*???ɡ?
????????????????????????????
????passwd peter –l
????????????
????passwd peter –u
????6?????????????
????userdel peter
????groupdel peter
????usermod –G peter peter   ??????????????????????????μ????????????????
????7??????????????
??????/etc/group ???GROUP1????У???? A
??????????????
????gpasswd -d A GROUP
????8???????????
????id user
????cat /etc/passwd
????9. groups