尝试创建用户并将其添加到组时出现错误：
inherit extrausers
EXTRA_USERS_PARAMS = " groupadd radio; \
useradd -g radio -p '' elton;"
我还尝试使用usermod进行变体，结果相似。错误日志状态：
NOTE: Executing set_user_group ...
DEBUG: Executing shell function set_user_group
NOTE: petalinux-user-image: Performing usermod with [-R /home/kenny/Desktop/radio/build/tmp/work/plnx_zynq7-xilinx-linux-gnueabi/petalinux-user-image/1.0-r0/rootfs -P root]
Usage: usermod [options] LOGIN
Options:
-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 expiration date to EXPIRE_DATE
-f, --inactive INACTIVE set password inactive after expiration
to INACTIVE
-g, --gid GROUP force use GROUP as new primary group
-G, --groups GROUPS new list of supplementary GROUPS
-a, --append append the user to the supplemental GROUPS
mentioned by the -G option without removing
the user from other groups
-h, --help display this help message and exit
-l, --login NEW_LOGIN new value of the login name
-L, --lock lock the user account
-m, --move-home move contents of the home directory to the
new location (use only with -d)
-o, --non-unique allow using duplicate (non-unique) UID
-p, --password PASSWORD use encrypted password for the new password
-P, --clear-password PASSWORD use clear password for the new password
-R, --root CHROOT_DIR directory to chroot into
-A, --prefix PREFIX_DIR prefix directory where are located the /etc/* files
-s, --shell SHELL new login shell for the user account
-u, --uid UID new UID for the user account
-U, --unlock unlock the user account
-v, --add-subuids FIRST-LAST add range of subordinate uids
-V, --del-subuids FIRST-LAST remove range of subordinate uids
-w, --add-subgids FIRST-LAST add range of subordinate gids
-W, --del-subgids FIRST-LAST remove range of subordinate gids
ERROR: petalinux-user-image: usermod command did not succeed.
我正在使用Petalinux 2019.1，后者正在使用Yocto / Thud。