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homework111.sh

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+
+username="testuser"
+groupname="testgroup"
+
+if getent group $groupname > /dev/null; then
+	echo "组${groupname}已存在,跳过创建"
+else
+	sudo groupadd $groupname
+	echo "${groupname}创建成功"
+fi
+
+if id -u $username > /dev/null 2>&1; then
+	echo "用户${username}已存在,跳过创建"
+else
+	sudo useradd -m -s /bin/bash $username
+	echo "${username}用户创建成功"
+
+	echo "$username:123456"|sudo chpasswd
+	echo "密码已设置为123456"
+fi
+
+sudo usermod -a -G $groupname $username
+
+id $username