I've been through as many of the bugfixes as I can find for the classic ssh key issue : I've set up my public and private keys "correctly" but passwordless login still doesn't work. The details :

First, I know that nobody wants to read about yet another permission issue :

```
~$ ls -lhd $HOME
drwx------. 28 mrkelly mrkelly 4.0K May 13 16:23 /mnt/driveB/mrkelly
~$ ls -lhd $HOME/.ssh
drwx------. 2 mrkelly mrkelly 4.0K May 13 15:37 /mnt/driveB/mrkelly/.ssh
~$ ls -lh $HOME/.ssh
total 24K
-rwx------. 1 mrkelly mrkelly 1.7K May 13 15:37 authorized_keys
-rwx------. 1 mrkelly mrkelly  668 May 13 15:20 id_dsa
-rwx------. 1 mrkelly mrkelly  625 May 13 15:20 id_dsa.pub
-rwx------. 1 mrkelly mrkelly 1.7K May 13 15:11 id_rsa
-rwx------. 1 mrkelly mrkelly  417 May 13 15:11 id_rsa.pub
-rwx------. 1 mrkelly mrkelly  980 May 13 14:57 known_hosts
/$ ll -d /
dr-xr-xr-x. 17 root root 4.0K May 14 12:21 /
/$ ll -d /mnt
drwxr-xr-x. 4 root root 4.0K Nov 18 04:33 /mnt
/$ ll -d /mnt/driveB
drwxr-xr-x. 4 root root 4.0K May 13 17:31 /mnt/driveB
~$ uname -a 
Linux action-jackson.stanford.edu 3.19.7-200.fc21.x86_64 #1 SMP Thu May 7 22:00:21 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

```

Having read that SELinux is a common villain in cases like these, I've disabled it : 

```
~$ sudo systemctl status selinux 
● selinux.service
   Loaded: not-found (Reason: No such file or directory)
   Active: inactive (dead)

```

I'm admin on the host machine, so I use one terminal for the sshd server-side service and one as a client.

First, the working version:

* Host terminal (sshd has been disabled) : 

```
~$ sudo /usr/sbin/sshd -d   
debug1: sshd version OpenSSH_6.6.1, OpenSSL 1.0.1k-fips 8 Jan 2015
debug1: key_parse_private2: missing begin marker
debug1: read PEM private key done: type RSA
debug1: private host key: #0 type 1 RSA
debug1: key_parse_private2: missing begin marker
debug1: read PEM private key done: type ECDSA
debug1: private host key: #1 type 3 ECDSA
debug1: private host key: #2 type 4 ED25519
debug1: rexec_argv[0]='/usr/sbin/sshd'
debug1: rexec_argv[1]='-d'
Set /proc/self/oom_score_adj from 0 to -1000
debug1: Bind to port 22 on 0.0.0.0.
Server listening on 0.0.0.0 port 22.
debug1: Bind to port 22 on ::.
Server listening on :: port 22.

```

(We're here until logging in with the "client" terminal, and then:) 

```
debug1: Server will not fork when running in debugging mode.
debug1: rexec start in 5 out 5 newsock 5 pipe -1 sock 8
debug1: inetd sockets after dupping: 3, 3
Connection from 127.0.0.1 port 49966 on 127.0.0.1 port 22
debug1: Client protocol version 2.0; client software version OpenSSH_6.6.1
debug1: match: OpenSSH_6.6.1 pat OpenSSH_6.6.1* compat 0x04000000
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1
debug1: SELinux support enabled [preauth]
debug1: ssh_selinux_change_context: setting context from 'unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023' to 'unconfined_u:unconfined_r:sshd_net_t:s0-s0:c0.c1023' [preauth]
debug1: permanently_set_uid: 74/74 [preauth]
debug1: list_hostkey_types: ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
debug1: SSH2_MSG_KEXINIT sent [preauth]
debug1: SSH2_MSG_KEXINIT received [preauth]
debug1: kex: client->server aes128-ctr hmac-md5-etm@openssh.com none [preauth]
debug1: kex: server->client aes128-ctr hmac-md5-etm@openssh.com none [preauth]
debug1: kex: curve25519-sha256@libssh.org need=16 dh_need=16 [preauth]
debug1: kex: curve25519-sha256@libssh.org need=16 dh_need=16 [preauth]
debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
debug1: SSH2_MSG_NEWKEYS sent [preauth]
debug1: expecting SSH2_MSG_NEWKEYS [preauth]
debug1: SSH2_MSG_NEWKEYS received [preauth]
debug1: KEX done [preauth]
debug1: userauth-request for user mrkelly service ssh-connection method none [preauth]
debug1: attempt 0 failures 0 [preauth]
debug1: PAM: initializing for "mrkelly"
debug1: PAM: setting PAM_RHOST to "localhost.localdomain"
debug1: PAM: setting PAM_TTY to "ssh"
debug1: userauth-request for user mrkelly service ssh-connection method publickey [preauth]
debug1: attempt 1 failures 0 [preauth]
debug1: test whether pkalg/pkblob are acceptable [preauth]
debug1: temporarily_use_uid: 1000/1000 (e=0/0)
debug1: trying public key file /mnt/driveB/mrkelly/.ssh/authorized_keys
debug1: fd 4 clearing O_NONBLOCK
Found matching RSA key: d7:9e:aa:54:63:d7:2d:87:d3:b1:0e:83:3b:70:27:d4
debug1: restore_uid: 0/0
Postponed publickey for mrkelly from 127.0.0.1 port 49966 ssh2 [preauth]
debug1: userauth-request for user mrkelly service ssh-connection method publickey [preauth]
debug1: attempt 2 failures 0 [preauth]
debug1: temporarily_use_uid: 1000/1000 (e=0/0)
debug1: trying public key file /mnt/driveB/mrkelly/.ssh/authorized_keys
debug1: fd 4 clearing O_NONBLOCK
Found matching RSA key: d7:9e:aa:54:63:d7:2d:87:d3:b1:0e:83:3b:70:27:d4
debug1: restore_uid: 0/0
debug1: ssh_rsa_verify: signature correct
debug1: do_pam_account: called
Accepted publickey for mrkelly from 127.0.0.1 port 49966 ssh2: RSA d7:9e:aa:54:63:d7:2d:87:d3:b1:0e:83:3b:70:27:d4
debug1: monitor_child_preauth: mrkelly has been authenticated by privileged process
debug1: monitor_read_log: child log fd closed
debug1: SELinux support enabled
debug1: PAM: establishing credentials
User child is on pid 8196
debug1: PAM: establishing credentials
debug1: permanently_set_uid: 1000/1000
debug1: Entering interactive session for SSH2.
debug1: server_init_dispatch_20
debug1: server_input_channel_open: ctype session rchan 0 win 1048576 max 16384
debug1: input_session_request
debug1: channel 0: new [server-session]
debug1: session_new: session 0
debug1: session_open: channel 0
debug1: session_open: session 0: link with channel 0
debug1: server_input_channel_open: confirm session
debug1: server_input_global_request: rtype no-more-sessions@openssh.com want_reply 0
debug1: server_input_channel_req: channel 0 request x11-req reply 1
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req x11-req
debug1: channel 1: new [X11 inet listener]
debug1: channel 2: new [X11 inet listener]
debug1: server_input_channel_req: channel 0 request pty-req reply 1
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req pty-req
debug1: Allocating pty.
debug1: session_new: session 0
debug1: SELinux support enabled
debug1: session_pty_req: session 0 alloc /dev/pts/4
debug1: server_input_channel_req: channel 0 request env reply 0
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req env
debug1: server_input_channel_req: channel 0 request env reply 0
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req env
debug1: server_input_channel_req: channel 0 request shell reply 1
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req shell
Starting session: shell on pts/4 for mrkelly from 127.0.0.1 port 49966
debug1: Setting controlling tty using TIOCSCTTY.

```
* Client terminal :

```
~$ ssh -v `whoami`@localhost
OpenSSH_6.6.1, OpenSSL 1.0.1k-fips 8 Jan 2015
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 56: Applying options for *
debug1: Connecting to localhost [127.0.0.1] port 22.
debug1: Connection established.
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_rsa type 1
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_rsa-cert type -1
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_dsa type 2
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_dsa-cert type -1
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_ecdsa type -1
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_ecdsa-cert type -1
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_ed25519 type -1
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1
debug1: match: OpenSSH_6.6.1 pat OpenSSH_6.6.1* compat 0x04000000
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5-etm@openssh.com none
debug1: kex: client->server aes128-ctr hmac-md5-etm@openssh.com none
debug1: kex: curve25519-sha256@libssh.org need=16 dh_need=16
debug1: kex: curve25519-sha256@libssh.org need=16 dh_need=16
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 8d:cb:f2:94:da:97:7b:0d:ee:e6:bb:8e:3f:41:ae:d8
debug1: Host 'localhost' is known and matches the ECDSA host key.
debug1: Found key in /mnt/driveB/mrkelly/.ssh/known_hosts:3
debug1: ssh_ecdsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /mnt/driveB/mrkelly/.ssh/id_rsa
debug1: Server accepts key: pkalg ssh-rsa blen 279
debug1: key_parse_private2: missing begin marker
debug1: read PEM private key done: type RSA
debug1: Authentication succeeded (publickey).
Authenticated to localhost ([127.0.0.1]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: Requesting X11 forwarding with authentication spoofing.
debug1: Sending environment.
debug1: Sending env LANGUAGE = 
debug1: Sending env LANG = en_US.UTF-8
Last login: Wed May 13 15:58:17 2015 from localhost.localdomain
Environment:
  LANGUAGE=
  LANG=en_US.UTF-8
  USER=mrkelly
  LOGNAME=mrkelly
  HOME=/mnt/driveB/mrkelly
  PATH=/usr/local/bin:/usr/bin
  MAIL=/var/mail/mrkelly
  SHELL=/bin/zsh
  SSH_CLIENT=127.0.0.1 49967 22
  SSH_CONNECTION=127.0.0.1 49967 127.0.0.1 22
  SSH_TTY=/dev/pts/4
  TERM=xterm-256color
  DISPLAY=localhost:11.0
  SELINUX_ROLE_REQUESTED=
  SELINUX_LEVEL_REQUESTED=
  SELINUX_USE_CURRENT_RANGE=
  XDG_SESSION_ID=21
  XDG_RUNTIME_DIR=/run/user/1000
  XDG_SEAT=seat0
  XDG_VTNR=1
Running /usr/bin/xauth remove unix:11.0
/usr/bin/xauth add unix:11.0 MIT-MAGIC-COOKIE-1 62951eb22f06d56df8189ee23126a19e

```

(Working, passwordless login)

Now, we restart sshd.service and show the non-working version.

* Host terminal 

```
sudo systemctl start sshd

```
* Client terminal 

```
~$ ssh -v `whoami`@localhost
OpenSSH_6.6.1, OpenSSL 1.0.1k-fips 8 Jan 2015
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 56: Applying options for *
debug1: Connecting to localhost [127.0.0.1] port 22.
debug1: Connection established.
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_rsa type 1
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_rsa-cert type -1
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_dsa type 2
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_dsa-cert type -1
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_ecdsa type -1
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_ecdsa-cert type -1
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_ed25519 type -1
debug1: identity file /mnt/driveB/mrkelly/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1
debug1: match: OpenSSH_6.6.1 pat OpenSSH_6.6.1* compat 0x04000000
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5-etm@openssh.com none
debug1: kex: client->server aes128-ctr hmac-md5-etm@openssh.com none
debug1: kex: curve25519-sha256@libssh.org need=16 dh_need=16
debug1: kex: curve25519-sha256@libssh.org need=16 dh_need=16
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 8d:cb:f2:94:da:97:7b:0d:ee:e6:bb:8e:3f:41:ae:d8
debug1: Host 'localhost' is known and matches the ECDSA host key.
debug1: Found key in /mnt/driveB/mrkelly/.ssh/known_hosts:3
debug1: ssh_ecdsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /mnt/driveB/mrkelly/.ssh/id_rsa
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Offering DSA public key: /mnt/driveB/mrkelly/.ssh/id_dsa
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Trying private key: /mnt/driveB/mrkelly/.ssh/id_ecdsa
debug1: Trying private key: /mnt/driveB/mrkelly/.ssh/id_ed25519
debug1: Next authentication method: keyboard-interactive
Password: 

```

(and there it is).

A couple final remarks : I recently had to reformat the installation drive and I'm using my folder that was stored on another drive. When reinstalling Fedora 21, I was forced to create a home directory on that drive, but then I switched my user account to point to a backed-up version of my old home directory after I created the mount points for the other drives.

EDIT : Passwordless login also works using the following invocations : 

```
/usr/sbin/sshd -D

```

(no daemon, but no debug messages)

```
/usr/shbin/sshd

```

( which I guess constitutes a temporary workaround,since this does invoke the daemon)

EDIT2: output from `sudo journalctl -u sshd` after `sudo systemctl restart sshd` (logging level debug3)

I'm at the character limit for submissions, so I'll link to a [plain text file in dropbox](https://dl.dropboxusercontent.com/u/89105205/sshdlogdump.txt) with the output.

Thanks for any help you can provide!