问无法从本地主机进行"git克隆“

EN

cat /home/user1/.ssh/config
Host system1
        Hostname <system1_ip>
        User user1
        IdentityFile ~/.ssh/id_rsa_common

cat /home/user1/.gitconfig
[user]
        email = user1@gmail.com
        name = user1

user1@system1:~/.ssh$ ls -al
total 28
drwx------  2 user1 user1 4096 Apr 18 00:09 .
drwxr-xr-x 50 user1 user1 4096 Apr 18 00:06 ..
-rw-------  1 user1 user1  408 Feb 18  2017 authorized_keys
-rw-rw-r--  1 user1 user1   91 Apr 18 00:04 config
-r--------  1 user1 user1 1675 Feb 24  2017 id_rsa_common
-rw-r--r--  1 user1 user1  408 Feb 24  2017 id_rsa_common.pub
-rw-r--r--  1 user1 user1 1550 Apr 12 19:51 known_hosts


user1@system2:~/.ssh$ ls -al
total 24
drwxrwxr-x  2 user1 user1 4096 Apr 17 20:12 .
drwxr-xr-x 21 user1 user1 4096 Apr 17 23:08 ..
-rw-rw-r--  1 user1 user1   91 Apr 17 20:12 config
-r--------  1 user1 user1 1675 Apr 17 20:12 id_rsa_common
-rw-r--r--  1 user1 user1  408 Apr 17 20:12 id_rsa_common.pub
-rw-r--r--  1 user1 user1 1550 Apr 17 20:12 known_hosts

user1@system2:~/job/test$ git clone ssh://<system1_ip>/home/git_root/mypicture.git
Cloning into 'mypicture'...
warning: You appear to have cloned an empty repository.
Checking connectivity... done.
orion@ubuntu-pavilion:~/job/test$ ls -al mypicture/
total 12
drwxrwxr-x 3 user1 user1 4096 Apr 18 01:38 .
drwxrwxr-x 3 user1 user1 4096 Apr 18 01:38 ..
drwxrwxr-x 7 user1 user1 4096 Apr 18 01:38 .git

user1@system1:~/job/git_test/local/temp$ git clone ssh://<system1_ip>/home/git_root/mypicture.git
Cloning into 'mypicture'...
Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

...
debug1: SSH2_MSG_NEWKEYS received
debug2: key: /home/user1/.ssh/id_rsa ((nil))
debug2: key: /home/user1/.ssh/id_dsa ((nil))
debug2: key: /home/user1/.ssh/id_ecdsa ((nil))
debug2: key: /home/user1/.ssh/id_ed25519 ((nil))
....
debug1: Trying private key: /home/user1/.ssh/id_rsa
debug3: no such identity: /home/user1/.ssh/id_rsa: No such file or directory
debug1: Trying private key: /home/user1/.ssh/id_dsa
debug3: no such identity: /home/user1/.ssh/id_dsa: No such file or directory
debug1: Trying private key: /home/user1/.ssh/id_ecdsa
debug3: no such identity: /home/user1/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /home/user1/.ssh/id_ed25519
debug3: no such identity: /home/user1/.ssh/id_ed25519: No such file or directory