{"id":1039,"date":"2015-03-14T15:07:08","date_gmt":"2015-03-14T13:07:08","guid":{"rendered":"http:\/\/www.nico-maas.de\/wordpress\/?p=1039"},"modified":"2015-03-04T15:07:27","modified_gmt":"2015-03-04T13:07:27","slug":"linux-delete-old-ssh-keys-and-recreate-them","status":"publish","type":"post","link":"https:\/\/www.nico-maas.de\/?p=1039","title":{"rendered":"[Linux] Delete old SSH Keys and recreate them"},"content":{"rendered":"<p>If you are downloading an Linux Image for i.e. Embedded Systems like Raspberry Pi, sometimes, the SSH Keys are still on the system and are not recreated.<br \/>\nTo do that manually, just enter:<\/p>\n<p><code><br \/>\nsudo rm \/etc\/ssh\/ssh_host_*<br \/>\nsudo dpkg-reconfigure openssh-server<br \/>\nsudo service ssh restart<br \/>\n<\/code><\/p>\n<div class=\"shariff shariff-align-left shariff-widget-align-left\"><ul class=\"shariff-buttons theme-round orientation-horizontal buttonsize-small\"><li class=\"shariff-button printer shariff-nocustomcolor\" style=\"background-color:#a8a8a8\"><a href=\"javascript:window.print()\" title=\"print\" aria-label=\"print\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; 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background-color:#cb2027; color:#fff\" target=\"_blank\"><span class=\"shariff-icon\" style=\"\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 27 32\"><path fill=\"#cb2027\" d=\"M27.4 16q0 3.7-1.8 6.9t-5 5-6.9 1.9q-2 0-3.9-0.6 1.1-1.7 1.4-2.9 0.2-0.6 1-3.8 0.4 0.7 1.3 1.2t2 0.5q2.1 0 3.8-1.2t2.7-3.4 0.9-4.8q0-2-1.1-3.8t-3.1-2.9-4.5-1.2q-1.9 0-3.5 0.5t-2.8 1.4-2 2-1.2 2.3-0.4 2.4q0 1.9 0.7 3.3t2.1 2q0.5 0.2 0.7-0.4 0-0.1 0.1-0.5t0.2-0.5q0.1-0.4-0.2-0.8-0.9-1.1-0.9-2.7 0-2.7 1.9-4.6t4.9-2q2.7 0 4.2 1.5t1.5 3.8q0 3-1.2 5.2t-3.1 2.1q-1.1 0-1.7-0.8t-0.4-1.9q0.1-0.6 0.5-1.7t0.5-1.8 0.2-1.4q0-0.9-0.5-1.5t-1.4-0.6q-1.1 0-1.9 1t-0.8 2.6q0 1.3 0.4 2.2l-1.8 7.5q-0.3 1.2-0.2 3.2-3.7-1.6-6-5t-2.3-7.6q0-3.7 1.9-6.9t5-5 6.9-1.9 6.9 1.9 5 5 1.8 6.9z\"\/><\/svg><\/span><\/a><\/li><\/ul><\/div>","protected":false},"excerpt":{"rendered":"<p>If you are downloading an Linux Image for i.e. Embedded Systems like Raspberry Pi, sometimes, the SSH Keys are still on the system and are not recreated. To do that manually, just enter: sudo rm \/etc\/ssh\/ssh_host_* sudo dpkg-reconfigure openssh-server sudo service ssh restart<\/p>\n<div class=\"shariff shariff-align-left shariff-widget-align-left\"><ul class=\"shariff-buttons theme-round orientation-horizontal buttonsize-small\"><li class=\"shariff-button printer shariff-nocustomcolor\" style=\"background-color:#a8a8a8\"><a href=\"javascript:window.print()\" title=\"print\" aria-label=\"print\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; background-color:#999; color:#fff\"><span class=\"shariff-icon\" style=\"\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 30 32\"><path fill=\"#999\" d=\"M6.8 27.4h16v-4.6h-16v4.6zM6.8 16h16v-6.8h-2.8q-0.7 0-1.2-0.5t-0.5-1.2v-2.8h-11.4v11.4zM27.4 17.2q0-0.5-0.3-0.8t-0.8-0.4-0.8 0.4-0.3 0.8 0.3 0.8 0.8 0.3 0.8-0.3 0.3-0.8zM29.7 17.2v7.4q0 0.2-0.2 0.4t-0.4 0.2h-4v2.8q0 0.7-0.5 1.2t-1.2 0.5h-17.2q-0.7 0-1.2-0.5t-0.5-1.2v-2.8h-4q-0.2 0-0.4-0.2t-0.2-0.4v-7.4q0-1.4 1-2.4t2.4-1h1.2v-9.7q0-0.7 0.5-1.2t1.2-0.5h12q0.7 0 1.6 0.4t1.3 0.8l2.7 2.7q0.5 0.5 0.9 1.4t0.4 1.6v4.6h1.1q1.4 0 2.4 1t1 2.4z\"\/><\/svg><\/span><\/a><\/li><li class=\"shariff-button mailto shariff-nocustomcolor\" style=\"background-color:#a8a8a8\"><a href=\"mailto:?body=https%3A%2F%2Fwww.nico-maas.de%2F%3Fp%3D1039&subject=%5BLinux%5D%20Delete%20old%20SSH%20Keys%20and%20recreate%20them\" title=\"Send by email\" aria-label=\"Send by email\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; 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January 2016","format":false,"excerpt":"Ok, an little update on the PiZero Cluster Front: Now, that OTG is compiled directly into the \"next\" kernel of RPi, we can use the OTG USB Virtual Ethernet directly - which makes it a lot easier. So I updated this :). 0. Preparing Minibian Jessie Image I used some\u2026","rel":"","context":"In &quot;Computer&quot;","block_context":{"text":"Computer","link":"https:\/\/www.nico-maas.de\/?cat=4"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1151,"url":"https:\/\/www.nico-maas.de\/?p=1151","url_meta":{"origin":1039,"position":1},"title":"[RPi] The cheapest Raspberry Pi Cluster Ever Made","author":"Nico Maas","date":"26. December 2015","format":false,"excerpt":"As soon as the Pi Zero came out, I started on thinking about Clusters again. I wanted to create an big - but at the same time, cheap cluster. Yes, an Pi Zero is not nearly as fast, as an RPi 2. And yes, there are some problems with this\u2026","rel":"","context":"In &quot;Projects&quot;","block_context":{"text":"Projects","link":"https:\/\/www.nico-maas.de\/?cat=23"},"img":{"alt_text":"ppplink","src":"https:\/\/i0.wp.com\/www.nico-maas.de\/wordpress\/wp-content\/uploads\/ppplink-300x225.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":1317,"url":"https:\/\/www.nico-maas.de\/?p=1317","url_meta":{"origin":1039,"position":2},"title":"[Ubuntu] Use Molly-Guard to stop shooting your own leg","author":"Nico Maas","date":"23. September 2016","format":false,"excerpt":"If you're working on some dozens of linux servers (or even more than 100,.. as in my case), you end up doing administration via SSH - which is the way to go. And chances are, that you'll get dozens of SSH connections open in dozens of tabs and you did\u2026","rel":"","context":"In &quot;Security&quot;","block_context":{"text":"Security","link":"https:\/\/www.nico-maas.de\/?cat=415"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":900,"url":"https:\/\/www.nico-maas.de\/?p=900","url_meta":{"origin":1039,"position":3},"title":"[RaspPi] OpenWRT Trunk with latest Raspberry Pi 3.10.32+ #648 Kernel \u2013 as Image download","author":"Nico Maas","date":"11. March 2014","format":false,"excerpt":"As a lot of people asked for the OpenWRT \/ Raspberry Pi Images, I decided to make a new version which replaces the old one from this post ([RaspPi] OpenWRT Trunk with latest Raspberry Pi 3.10.18+ #585 Kernel \u2013 as Image download). That said, the rules haven't changed: - It\u2026","rel":"","context":"In &quot;OpenWRT&quot;","block_context":{"text":"OpenWRT","link":"https:\/\/www.nico-maas.de\/?cat=107"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1061,"url":"https:\/\/www.nico-maas.de\/?p=1061","url_meta":{"origin":1039,"position":4},"title":"[RaspPi] Snappy Ubuntu Core on Raspberry Pi 2","author":"Nico Maas","date":"4. March 2015","format":false,"excerpt":"Well, I finally got my Raspberry Pi 2 and just could not hold back and wanted to test Snappy Ubuntu Core and give a little introduction and how that thing works. Ok, but short into: What is Snappy Ubuntu Core? Well it is meant to be a secure operating system\u2026","rel":"","context":"In &quot;Computer&quot;","block_context":{"text":"Computer","link":"https:\/\/www.nico-maas.de\/?cat=4"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2241,"url":"https:\/\/www.nico-maas.de\/?p=2241","url_meta":{"origin":1039,"position":5},"title":"[WSL2\/Win10] virt-manager for kvm on Windows","author":"Nico Maas","date":"29. December 2020","format":false,"excerpt":"kvm Virtualisiation is great, however, useable tools to create and manage said VMs are rare. The best tool for the job, virt-manager is only available for Linux machines. But what if you want to manage said VMs also via Windows 10? WSL2 to the rescue: Just install WSL2 as shown\u2026","rel":"","context":"In &quot;Unix \\ Linux&quot;","block_context":{"text":"Unix \\ Linux","link":"https:\/\/www.nico-maas.de\/?cat=18"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=\/wp\/v2\/posts\/1039","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1039"}],"version-history":[{"count":1,"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=\/wp\/v2\/posts\/1039\/revisions"}],"predecessor-version":[{"id":1040,"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=\/wp\/v2\/posts\/1039\/revisions\/1040"}],"wp:attachment":[{"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1039"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1039"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nico-maas.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1039"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}