initial install packages

** firefox
- restore previous settings
  modify Path in -> ~/.mozill/firefox/profiles.ini


** telegram
- start and fix in luncher
  > change download directory -> ~/tmp


** sshd with OpenSSH
  install sshd  ---> openssh-server.html
  https://help.ubuntu.com/lts/serverguide/openssh-server.html

sudo apt-get install openssh-client
sudo apt-get install openssh-server

$ sudo vi /etc/ssh/sshd_config

#+TITLE: /etc/ssh/sshd_config
#+begin_src
...
   # change Port to --> 22222
   : leave it port 22 -e Port to --> 22
   uncomment ListenAddress 0.0.0.0
   comment   ListenAddress ::
    sshd 가 공개 키 기반의 로그인 신뢰서를 허용하게 하려면, /etc/ssh/sshd_config 다음 부분 변경
    PubkeyAuthentication yes
    If the line is already present, then ensure it is not commented out.

    서버에서 로그인하기 전에 보여줄 배너로 /etc/issue.net 파일의 내용을 표시
    Banner /etc/issue.net
    In the /etc/ssh/sshd_config file.
...
#+end_src

 sudo service ssh restart

** sudo apt-get install xinetd