\/dev\/volgroup1\/ubuntu16.04 is really Ubuntu 20.04
\n\/dev\/volgroup1\/ubuntu18.04 is the old Ubuntu 18.04 installation
\nBoth logical volumes are the same size<\/p>\n
First rename the old logical volume to reflect what will be stored there: copy the contents of the current OS in ubuntu16.04 to linux2: Mount the new volume: Load Grub Customizer if you don’t already have it: Verify you can boot into primary and alternate<\/p>\n When running alternate, rename logical volume ubuntu16.04 to linux1, update its fstab and update Grub as above.<\/p>\n Now that there’s a backup copy of the current OS in Ubuntu alternate, it’s safe to boot into Ubuntu primary and begin the upgrade<\/p>\n","protected":false},"excerpt":{"rendered":" \/dev\/volgroup1\/ubuntu16.04 is really Ubuntu 20.04 \/dev\/volgroup1\/ubuntu18.04 is the old Ubuntu 18.04 installation Both logical volumes are the same size Rename the old logical volume First rename the old logical volume to reflect what will be stored there: sudo lvrename volgroup1 ubuntu18.04 linux2 Back up the current OS copy the contents of the current OS in […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1656","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.familytidings.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1656","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.familytidings.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.familytidings.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.familytidings.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.familytidings.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1656"}],"version-history":[{"count":14,"href":"https:\/\/www.familytidings.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1656\/revisions"}],"predecessor-version":[{"id":1676,"href":"https:\/\/www.familytidings.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1656\/revisions\/1676"}],"wp:attachment":[{"href":"https:\/\/www.familytidings.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1656"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.familytidings.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1656"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.familytidings.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1656"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nsudo lvrename volgroup1 ubuntu18.04 linux2<\/code><\/p>\nBack up the current OS<\/h1>\n
\nsudo dd if=\/dev\/volgroup1\/ubuntu16.04 of=\/dev\/volgroup1\/linux2 bs=1024k<\/code><\/p>\nUpdate the backup copy to be bootable<\/h1>\n
\nsudo mkdir \/media\/linux2<\/code>
\nsudo mount \/dev\/volgroup1\/linux2 \/media\/linux2<\/code>
\nEdit \/media\/linux2\/etc\/fstab and change \/ to point to \/dev\/mapper\/volgroup1-linux2<\/p>\nUpdate Grub<\/h1>\n
\nsudo apt install grub-customizer<\/code>
\nRun Grub Customizer and check the entries for both logical volumes including the paths and LVIDs (which you can get from lvdisplay)
\nRename the entries to Ubuntu primary (linux1) and Ubuntu alternate (linux2)
\nDon’t forget to save, which runs update-grub<\/code> and install to MBR<\/p>\nCheck both logical volumes are OK<\/h1>\n