一、修改用户信息命令：usermod usermod --help Usage: usermod [options] LOGIN Options: -a, --***end ***end the user to the supplemental GROUPS mentioned by the -G option without removing the user from other groups -b, --badname allow bad names -c, --comment COMMENT new value of the GECOS field -d, --home HOME_DIR new home directory for the user account -e, --expiredate EXPIRE_DATE set account expi…。

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