shell 安装集群的免密登陆报错/usr/bin/ssh-copy-id: ERROR: No identities found ...

安装集群的时候要进行免密登陆，不想每台机器都手动人工操作，从网上找了一段shell脚本，如下：#!/bin/bash
# for self configure
wd=.tmp_ssh
#mkdir -p $wd
echo "mkdir success"
hosts=(`sed -n '3,$p' /etc/hosts | awk '{print $1}'`)
for i in "${hosts[@]}"
do
  script=$(cat << \EOF
  ssh-keygen -t rsa <<eof
eof
EOF
)
exe='bash << EOF
'"$script"'
EOF'
echo =======$i=======
ssh -o StrictHostKeyChecking=no $i "$exe"
# eval `ssh-agent -s`
# ssh-add -L
ssh-copy-id -i ~/.ssh/id_rsa.pub $i
scp $i:~/.ssh/id_rsa.pub $wd/id_rsa.pub_$i
done
cat $wd/id_rsa.pub_*  > $wd/authorized_keys
chmod 600 $wd/authorized_keys
for i in "${hosts[@]}"
do
scp $wd/authorized_keys $i:~/.ssh/
scp ~/.ssh/known_hosts $i:~/.ssh/
done
rm -rf $wd
echo "ssh finished!"
以root运行之后结果如下：报/usr/bin/ssh-copy-id: ERROR: No identities found错误，不知道什么原因，求高手解答

mkdir success
=======192.168.2.185=======
root@192.168.2.185's password:
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): /usr/bin/ssh-copy-id: ERROR: No identities found
root@192.168.2.185's password:
scp: /root/.ssh/id_rsa.pub: No such file or directory
=======192.168.2.186=======
root@192.168.2.186's password:
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): /usr/bin/ssh-copy-id: ERROR: No identities found
root@192.168.2.186's password:
scp: /root/.ssh/id_rsa.pub: No such file or directory
=======192.168.2.187=======
root@192.168.2.187's password:
Unable to get valid context for root
/usr/bin/ssh-copy-id: ERROR: No identities found
root@192.168.2.187's password:
Unable to get valid context for root
./ssh.sh: line 24: .tmp_ssh/authorized_keys: No such file or directory
chmod: cannot access `.tmp_ssh/authorized_keys': No such file or directory
root@192.168.2.185's password:
.tmp_ssh/authorized_keys: No such file or directory
root@192.168.2.185's password:
known_hosts                                        100% 1201    1.2KB/s 00:00
root@192.168.2.186's password:
.tmp_ssh/authorized_keys: No such file or directory
root@192.168.2.186's password:
known_hosts                                        100% 1201    1.2KB/s 00:00
root@192.168.2.187's password:
Unable to get valid context for root
root@192.168.2.187's password:
Unable to get valid context for root
ssh finished!