{"id":15,"date":"2016-05-29T21:46:42","date_gmt":"2016-05-30T01:46:42","guid":{"rendered":"http:\/\/williamkennerly.com\/blog\/?p=15"},"modified":"2016-05-30T13:35:01","modified_gmt":"2016-05-30T17:35:01","slug":"accessing-comet-at-sdsc","status":"publish","type":"post","link":"http:\/\/williamkennerly.com\/blog\/accessing-comet-at-sdsc\/","title":{"rendered":"Accessing Comet at SDSC"},"content":{"rendered":"<p><a href=\"http:\/\/www.sdsc.edu\/support\/user_guides\/comet.html\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright\" src=\"http:\/\/www.sdsc.edu\/assets\/images\/news_items\/PR100313_comet_full1.jpg\" alt=\"Don't let it hit you\" width=\"185\" height=\"126\" \/><\/a><a href=\"http:\/\/www.sdsc.edu\/support\/user_guides\/comet.html\">Comet<\/a> is the supercomputing cluster at the <a href=\"http:\/\/www.sdsc.edu\">San Diego Supercomputing Center<\/a> that we have been using to help us do calculations. \u00a0We have access to comet with support from\u00a0<a href=\"https:\/\/www.xsede.org\/home\">XSEDE<\/a> (thank you!)<\/p>\n<p>Comet is accessed over the internet using a command-line interface on the server <code>comet.sdsc.edu<\/code>. \u00a0The basic program we use to access comet is called &#8220;ssh&#8221; (which is an acronym for &#8220;secure shell&#8221;).<\/p>\n<p>On Mac OSX, you can go to Applications -&gt; Utilities -&gt; Terminal to open the command-line Linux interface on your mac. \u00a0\u00a0To login to comet from your mac, in the Terminal program type: <code>ssh wkennerl@comet.sdsc.edu\u00a0<\/code>Of course, use your own comet username in place of mine!<\/p>\n<p>On Windows,\u00a0there is no command-line Linux interface, so you need to use a separate program to connect to comet using ssh. \u00a0The classic program is called\u00a0<a href=\"http:\/\/www.chiark.greenend.org.uk\/~sgtatham\/putty\/download.html\">putty,<\/a> and it is pre-installed on all Skidmore-owned Windows computers. \u00a0You may prefer to get a program with more features, for example, the <a href=\"https:\/\/www.bitvise.com\/ssh-client-download\">Bitvise ssh client<\/a>\u00a0. \u00a0In either case, download and install a ssh program and tell it to access <code>comet.sdsc.edu<\/code>.<\/p>\n<p>On either type of computer, after a few seconds, you will connect to comet and be prompted for your password. \u00a0After you type in your password, you will be looking at a <a href=\"http:\/\/lifehacker.com\/5633909\/who-needs-a-mouse-learn-to-use-the-command-line-for-almost-anything\">Linux command line<\/a> (specifically, it is a bash prompt) on a computer 3000 miles away from Saratoga Springs. \u00a0Cool, eh?<\/p>\n<p>Now you can use comet for whatever calculation you need, using Linux commands, your input and output files (for gaussian or AMBER)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Comet is the supercomputing cluster at the San Diego Supercomputing Center that we have been using to help us do calculations. \u00a0We have access to comet with support from\u00a0XSEDE (thank you!) Comet is accessed over the internet using a command-line &hellip; <a href=\"http:\/\/williamkennerly.com\/blog\/accessing-comet-at-sdsc\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[3,6],"class_list":["post-15","post","type-post","status-publish","format-standard","hentry","category-computing","tag-comet","tag-ssh"],"_links":{"self":[{"href":"http:\/\/williamkennerly.com\/blog\/wp-json\/wp\/v2\/posts\/15","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/williamkennerly.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/williamkennerly.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/williamkennerly.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/williamkennerly.com\/blog\/wp-json\/wp\/v2\/comments?post=15"}],"version-history":[{"count":5,"href":"http:\/\/williamkennerly.com\/blog\/wp-json\/wp\/v2\/posts\/15\/revisions"}],"predecessor-version":[{"id":35,"href":"http:\/\/williamkennerly.com\/blog\/wp-json\/wp\/v2\/posts\/15\/revisions\/35"}],"wp:attachment":[{"href":"http:\/\/williamkennerly.com\/blog\/wp-json\/wp\/v2\/media?parent=15"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/williamkennerly.com\/blog\/wp-json\/wp\/v2\/categories?post=15"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/williamkennerly.com\/blog\/wp-json\/wp\/v2\/tags?post=15"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}