root@fourth:/home/fred# cd .ssh/
root@fourth:/home/fred/.ssh# ls -al
total 12
drwx------ 2 fred fred 4096 Sep 26 23:38 .
drwxr-xr-x 3 fred fred 4096 Sep 26 23:36 ..
-rw-r--r-- 1 root root  419 Sep 26 23:38 id_rsa.pub
root@fourth:/home/fred/.ssh# cat id_rsa.pub > authorized_keys
root@fourth:/home/fred/.ssh# chown fred:fred authorized_keys 
root@fourth:/home/fred/.ssh# chmod 600 authorized_keys 
-rw------- 1 fred fred 419 Sep 26 23:43 authorized_keys
-rw-r--r-- 1 root root 419 Sep 26 23:38 id_rsa.pub
root@fourth:/home/fred/.ssh# 

##</code><code>##

fred@fourth:~/.ssh$ ls -al
total 16
drwx------ 2 fred fred 4096 Sep 26 23:43 .
drwxr-xr-x 4 fred fred 4096 Sep 26 23:46 ..
-rw------- 1 fred fred  419 Sep 26 23:43 authorized_keys
-rw-r--r-- 1 root root  419 Sep 26 23:38 id_rsa.pub
fred@fourth:~/.ssh$ ..
fred@fourth:~$ ls -al
total 32
drwxr-xr-x 4 fred fred 4096 Sep 26 23:46 .
drwxr-xr-x 3 root root 4096 Sep 26 20:57 ..
-rw-r--r-- 1 fred fred  925 Sep 26 23:39 .bash_aliases
-rw-r--r-- 1 fred fred  220 Sep 26 20:57 .bash_logout
-rw-r--r-- 1 fred fred 3771 Sep 26 20:57 .bashrc
drwx------ 2 fred fred 4096 Sep 26 23:46 .cache
-rw-r--r-- 1 fred fred    0 Sep 26 20:57 .cloud-locale-test.skip
-rw-r--r-- 1 fred fred  807 Sep 26 20:57 .profile
drwx------ 2 fred fred 4096 Sep 26 23:43 .ssh
fred@fourth:~$