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<h3><a href="/post/enable-synology-public-ssh/">筆記- 啟用群暉NAS (Synology NAS)的SSH Server 透過Publickey 認證免密碼登入</a></h3>
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<div class="meta">
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<span class="date moment">2018-11-05</span>
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<a href="/categories/%E7%AD%86%E8%A8%98">筆記</a>
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<span class="author"><a href="/author/eric-chang">Eric Chang</a></span>
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</div>
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<p>公司內有幾台NAS，其中有一台用來放開發人員的postgresql dump file
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之前都是主要的開發人員上傳到google drive，分享出來 ，然後其他人去抓回來</p>
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<p>這樣子有個問題是，當server要存取這些檔案時，就沒辦法了，除非透過一些 3rd party的軟體
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像是這篇</p>
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<p><a href="https://www.omgubuntu.co.uk/2017/04/mount-google-drive-ocamlfuse-linux">https://www.omgubuntu.co.uk/2017/04/mount-google-drive-ocamlfuse-linux</a></p>
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<p>或者是這篇</p>
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<p><a href="https://www.maketecheasier.com/mount-google-drive-ubuntu/">https://www.maketecheasier.com/mount-google-drive-ubuntu/</a></p>
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<p>但是手邊的伺服器，原則上除非有必要，不然都沒有開放internet
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所以導致明明檔案就在那邊，但是要取得就是很麻煩</p>
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<p></p>
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<p>Dev_A upload to google drive —> Dev_B Download from google drive —> Dev_B scp download file to me —> I upload to server.</p>
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<p>有沒有？是不是很stupid (講話一定要烙英文)</p>
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<p>既然有現成的NAS在那邊，幹嘛不用呢？(攤手)</p>
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<p>聽說之前的人一直沒成功弄出來，讓Server可以直接去NAS存取檔案的方式，我記得這個不是很難啊
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就順手整理一下</p>
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<h3 id="新增使用者帳號-確認家目錄存在">新增使用者帳號/ 確認家目錄存在</h3>
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<p>在NAS 的管理界面上新增一個帳號，假設叫 eric 好了</p>
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<p><del>建立時，注意一下要指定家目錄路徑</del></p>
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<p>更正： 群暉的界面好像不能指定家目錄</p>
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<p>預設的路徑如下</p>
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<pre><code>eric:x:1071:100::/var/services/homes/eric:/sbin/nologin
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</code></pre>
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<p>不過我覺得怪怪的，因為在我手邊的幾台NAS底下 /var/services/homes 都切不過去
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確認一下路徑，發現那個 <code>@fake_home_link</code> 根本就不存在啊！</p>
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<pre><code>admin@storage:/volume1$ ls -lart /var/services/homes
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lrwxrwxrwx 1 root root 24 May 23 14:14 /var/services/homes -> /volume1/@fake_home_link
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admin@storage:/volume1$
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</code></pre>
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<p>我在想是不是之前的人有改過什麼..
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anyway ，反正先不管這邊，直接修改 /etc/passwd檔案</p>
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<pre><code>sudo vim /etc/passwd
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</code></pre>
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<p>修正到正確的路徑，順便把shell 也改掉，不然不能登入</p>
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<pre><code>eric:x:1071:100::/volume1/homes/eric:/bin/sh
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</code></pre>
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<h3 id="修改-etc-ssh-sshd-config">修改 /etc/ssh/sshd_config</h3>
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<p>再來修正預設沒有啟用 Publickey 驗證的 ssh</p>
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<pre><code>sudo vim /etc/ssh/sshd_config
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</code></pre>
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<p>確認底下三行存在</p>
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<pre><code>RSAAuthentication yes
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PubkeyAuthentication yes
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AuthorizedKeysFile .ssh/authorized_keys
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</code></pre>
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<h3 id="將key傳到-nas上">將KEY傳到 NAS上</h3>
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<p>先建立相關目錄，順便修正一下目錄權限</p>
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<pre><code>chmod 755 /volume1/homes/eric
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mkdir -p /volume1/homes/eric/.ssh
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chmod 700 /volume1/homes/eric/.ssh
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</code></pre>
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<p>再來把Publickey 傳到NAS，複製貼上也好，ssh-copy-id也可以，同時修正權限</p>
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<pre><code>vim /volume1/homes/eric/.ssh/authorized_keys
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chmod 0600 /volume1/eric/.ssh/authorized_keys
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</code></pre>
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<h3 id="重啟ssh">重啟SSH</h3>
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<p>本來這個步驟應該可以用</p>
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<pre><code>synoservicectl --restart sshd
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</code></pre>
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<p>來解決
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但是實際上這個指令只會把你踢出 SSH session ….( WTF!!! )</p>
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<p>所以還是要去NAS的管理界面，去關閉再打開SSH (有點蠢..)
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<img src="https://i.imgur.com/jcDQmI1.png" alt="Synology WEB UI" /></p>
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<p>然後就可以測試用Publickey 來登入NAS了</p>
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<pre><code>2018-11-05 14:47:12 [mini@s009 ansiblecontrol]$ ssh admin@storage
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admin@storage:~$
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</code></pre>
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<p>確認免密碼登入無誤了！</p>
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<a href="/tags/synology">synology</a>
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<div class="author">
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<a href="https://github.com/Lednerb/bilberry-hugo-theme" target="_blank">Bilberry Hugo Theme</a>
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</div>
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</div>
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</div>
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<script type="application/javascript">
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var doNotTrack = false;
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if (!doNotTrack) {
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window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date;
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ga('create', 'UA-128770427-1', 'auto');
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ga('send', 'pageview');
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}
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</script>
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<script async src='https://www.google-analytics.com/analytics.js'></script>
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<script type="text/javascript" src="https://h.cowbay.org/js/externalDependencies.39c47e10e241eae2947b3fe21809c572.js" integrity="md5-OcR+EOJB6uKUez/iGAnFcg=="></script>
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<script type="text/javascript" src="https://h.cowbay.org/js/theme.ff50ae6dc1bfc220b23bf69dbb41b54e.js" integrity="md5-/1CubcG/wiCyO/adu0G1Tg=="></script>
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<script>
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$(".moment").each(function() {
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$(this).text(
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moment( $(this).text() )
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.locale( "en" )
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.format('LL')
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);
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});
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$(".footnote-return sup").html("");
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</script>
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<script>
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var client = algoliasearch("2XL0P8XDCY", "4ef65b37b627bb886b46c34a10e63aa6");
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var index = client.initIndex("h_cowbay_org");
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$('#search').autocomplete({ hint: false, autoselect: true, debug: false },
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[
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{
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source: $.fn.autocomplete.sources.hits(index, { hitsPerPage: 10 }),
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displayKey: function(suggestion) {
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return suggestion.title || suggestion.author
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},
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templates: {
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suggestion: function(suggestion) {
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return "<span class='entry " + suggestion.type + "'>"
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+ "<span class='title'>" + suggestion.title + "</span>"
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+ "<span class='fa fa-fw " + suggestion.iconClass + "'></span>"
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+ "</span>"
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;
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},
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empty: function() {
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return "<span class='empty'>Nothing found.</span>"
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},
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footer: function() {
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return '<div class="branding">Powered by <img src="https:\/\/h.cowbay.org\/dist\/algolia-logo-light.svg" /></div>'
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}
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},
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}
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])
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.on('autocomplete:selected', function(event, suggestion, dataset) {
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window.location = (suggestion.url);
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})
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.keypress(function (event, suggestion) {
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if (event.which == 13) {
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window.location = (suggestion.url);
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}
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});
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</script>
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</body>
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</html>
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