ubuntu ip-10-0-30-19 ll ssh total 60 drwx------ ubuntu ubuntu 4096 Oct

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ubuntu@ip-10-0-30-19:~$ ll ~/.ssh/
total 60
drwx------ 2 ubuntu ubuntu 4096 Oct 29 2017 ./
drwxr-xr-x 18 ubuntu ubuntu 4096 Dec 29 09:36 ../
-r-------- 1 ubuntu ubuntu 1672 Aug 15 2017 app.pem
-rw------- 1 ubuntu ubuntu 393 May 18 2017 authorized_keys
-r-------- 1 ubuntu ubuntu 1671 Oct 29 2017 california.pem
-rw------- 1 ubuntu ubuntu 1672 Feb 9 2017 id_dsa
-rw-r--r-- 1 ubuntu ubuntu 24810 Feb 21 2018 known_hosts
-r-------- 1 ubuntu ubuntu 1671 Aug 17 2017 tokyo.pem