{"id":207,"date":"2013-08-13T05:08:47","date_gmt":"2013-08-13T05:08:47","guid":{"rendered":"https:\/\/digitalchild.info\/?p=207"},"modified":"2013-08-13T05:08:47","modified_gmt":"2013-08-13T05:08:47","slug":"samba-3-6-idmap","status":"publish","type":"post","link":"https:\/\/randomadult.local\/samba-3-6-idmap\/","title":{"rendered":"Samba 3.6 idmap"},"content":{"rendered":"<p>I have a couple of file servers in my network running Samba 3.6 as member servers. Something that you would want to get going at some point is syncing the UID\/GID across the machines so that if you want to move the data around the uids\/gids are the same. The way to make this work is with the idmap configurations. I hadn&#8217;t done this and in my stupidity had created a second file server that couldn&#8217;t move files to and from the first. IDIOT!<\/p>\n<p>In Samba 3.6 \u00a0<a title=\"Idmap changes\" href=\"http:\/\/wiki.samba.org\/index.php\/Samba_3.6_Features_added\/changed#ID_Mapping_Changes\" target=\"_blank\" rel=\"noopener noreferrer\">idmap was completely re-written<\/a> as it was a bit broken before then and its actually quite simple to have your machines all talking the same uid\/gid. This is to use the idmap_rid system. <a title=\"Samba docs\" href=\"http:\/\/www.samba.org\/samba\/docs\/man\/Samba-HOWTO-Collection\/idmapper.html#id2606596\" target=\"_blank\" rel=\"noopener noreferrer\">From the samba docs<\/a>.<\/p>\n<blockquote><p>The\u00a0<code>idmap_rid<\/code>\u00a0facility is a new tool that, unlike native winbind, creates a predictable mapping of MS Windows SIDs to UNIX UIDs and GIDs<\/p><\/blockquote>\n<p>If you have already setup your file server without using idmap_rid you can change how it works by adding the following lines to your global section of your samba conf file. Replacing the lines and or removing lines as required.<\/p>\n<pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n\nworkgroup = MYDOMAIN\npassword server = pdc.mydomain.com\nencrypt passwords = Yes\nrealm = MYDOMAIN.COM\nsecurity = ads\nallow trusted domains = false\nidmap config * : backend = tdb\nidmap config * : range = 10001-20000\nidmap config MYDOMAIN : backend = rid\nidmap config MYDOMAIN : range = 5000-10000\nidmap config MYDOMAIN : base_rid = 0\n\n<\/pre>\n<p>I&#8217;m not sure if this step is needed but I removed the member server from the domain. Then I restarted samba and winbind, rejoined the member server and I was still getting the old Ids. I realised that winbind was caching the old Id&#8217;s and no matter what I did I couldn&#8217;t work out how to update them.\u00a0After searching around for quite a while I found this <a title=\"Alex Cline\" href=\"http:\/\/alexcline.net\/2012\/10\/12\/flush-winbind-idmap-cache\/\" target=\"_blank\" rel=\"noopener noreferrer\">blog post<\/a> from Alex Cline. The commands are very straight forward.<\/p>\n<pre class=\"brush: plain; title: ; notranslate\" title=\"\"> net cache flush <\/pre>\n<p>It&#8217;s really that simple. I found posts all over the place talking about killing the samba data directory in \/var\/lib\/samba and that all sounded a little crazy. I&#8217;m glad its as simple as that. To test that this worked, just run the following command to see the new id from winbind.<\/p>\n<pre class=\"brush: plain; title: ; notranslate\" title=\"\"> id -u username <\/pre>\n<p>This should output your new rid generated id.<\/p>\n<p>Rinse and repeat for any other servers you might have.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I have a couple of file servers in my network running Samba 3.6 as member servers. Something that you would want to get going at some point is syncing the UID\/GID across the machines so that if you want to move the data around the uids\/gids are the same. The &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"ast-button\" href=\"https:\/\/randomadult.local\/samba-3-6-idmap\/\"> <span class=\"screen-reader-text\">Samba 3.6 idmap<\/span> Read More \u00bb<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[5],"tags":[34,66,92,166,170],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.11 (Yoast SEO v20.11) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Samba 3.6 idmap - Random Adult<\/title>\n<meta name=\"description\" content=\"I have a couple of file servers in my network running Samba 3.6 as member servers. Something that you would want to get going at some point is syncing the UID\/GID across the machines so that if you want to move the data around the uids\/gids are the same. The way to make this work is with the idmap configurations\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/randomadult.local\/samba-3-6-idmap\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Samba 3.6 idmap\" \/>\n<meta property=\"og:description\" content=\"I have a couple of file servers in my network running Samba 3.6 as member servers. Something that you would want to get going at some point is syncing the UID\/GID across the machines so that if you want to move the data around the uids\/gids are the same. 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