{"id":79249,"date":"2020-04-25T19:42:10","date_gmt":"2020-04-25T17:42:10","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/chto-novogo-v-ubuntu-20-04"},"modified":"2020-04-25T19:42:10","modified_gmt":"2020-04-25T17:42:10","slug":"chto-novogo-v-ubuntu-20-04","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/administrirovanie\/chto-novogo-v-ubuntu-20-04","title":{"rendered":"\u010co je nov\u00e9 v Ubuntu 20.04","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"\u010co je nov\u00e9 v Ubuntu 20.04\" src=\"\/wp-content\/uploads\/2020\/04\/e315f7ccdb370c7afdd5d9d0357ce10f.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n23. apr\u00edla <noindex><a rel=\"nofollow\" href=\"https:\/\/releases.ubuntu.com\/20.04\/\">sa uskuto\u010dnilo<\/a><\/noindex> uvedenie Ubuntu verzie 20.04 s k\u00f3dov\u00fdm n\u00e1zvom Focal Fossa, ktor\u00fd je \u010fal\u0161ou verziou Ubuntu pre dlhodob\u00fa podporu (LTS) a pokra\u010dovan\u00edm Ubuntu 18.04 LTS, vydan\u00e9ho v roku 2018.<\/p>\n<p>\u010co sa t\u00fdka k\u00f3dov\u00e9ho n\u00e1zvu. Slovo \u201eFocal\u201c znamen\u00e1 \u201ecentr\u00e1lny bod\u201c alebo \u201enajd\u00f4le\u017eitej\u0161ia \u010das\u0165\u201c, teda sa sp\u00e1ja s konceptom stredu, centrom ur\u010dit\u00fdch vlastnost\u00ed, javov, udalost\u00ed, a \u201eFossa\u201c m\u00e1 z\u00e1klad v \u201eFOSS\u201c (Free and Open-Source Software \u2014 slobodn\u00fd a otvoren\u00fd softv\u00e9r) a pod\u013ea trad\u00edcie pomenovania verzi\u00ed Ubuntu zvierac\u00edmi menami to znamen\u00e1 <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%A4%D0%BE%D1%81%D1%81%D0%B0\">Fossa<\/a><\/noindex> \u2014 najv\u00e4\u010d\u0161ie m\u00e4so\u017erav\u00e9 cicavce zo skupiny civetkov z ostrova Madagaskar.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<blockquote><p><b>V\u00fdvoj\u00e1ri ozna\u010duj\u00fa Ubuntu 20.04 ako d\u00f4le\u017eit\u00e9 a \u00faspe\u0161n\u00e9 aktualizovanie s podporou po\u010das nasleduj\u00facich 5 rokov pre desktopov\u00e9 po\u010d\u00edta\u010de a servery.<\/b><\/p><\/blockquote>\n<p>Ubuntu 20.04 bola logick\u00fdm pokra\u010dovan\u00edm Ubuntu 19.04 \u201eDisco Dingo\u201c a Ubuntu 19.10 \u201eEoan Ermine\u201c. Vo verzi\u00e1ch pre desktopov\u00e9 po\u010d\u00edta\u010de, v s\u00falade s posledn\u00fdmi trendmi, bola pridan\u00e1 tmav\u00e1 t\u00e9ma. T\u00fdmto sp\u00f4sobom m\u00e1 Ubuntu 20.04 tri varianty predvolenej t\u00e9my Yaru:<\/p>\n<ul>\n<li>Svetl\u00e1,<\/li>\n<li>Tmav\u00e1,<\/li>\n<li>\u0160tandardn\u00e1.<\/li>\n<\/ul>\n<p>\nAplik\u00e1cia Amazon bola taktie\u017e odstr\u00e1nen\u00e1. Ubuntu 20.04 pou\u017e\u00edva ako \u0161tandardn\u00e9 grafick\u00e9 prostredie posledn\u00fa verziu <noindex><a rel=\"nofollow\" href=\"https:\/\/itsfoss.com\/gnome-3-36-release\/\">GNOME 3.36<\/a><\/noindex>.<\/p>\n<p><img decoding=\"async\" alt=\"\u010co je nov\u00e9 v Ubuntu 20.04\" src=\"\/wp-content\/uploads\/2020\/04\/9b22ae9782de374acf7c7579c500e5fd.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<h2>K\u013e\u00fa\u010dov\u00e9 zmeny<\/h2>\n<p>\nUbuntu 20.04 je zalo\u017een\u00e1 na jadre 5.4, ktor\u00e9 bolo uveden\u00e9 na trh 24. novembra 2019. V tejto verzii boli implementovan\u00e9 niektor\u00e9 d\u00f4le\u017eit\u00e9 novinky, o ktor\u00fdch v\u00e1m ni\u017e\u0161ie povieme.<\/p>\n<h3>lz4<\/h3>\n<p>\nIn\u017einieri Canonical testovali r\u00f4zne algoritmy kompresie pre jadro a po\u010diato\u010dn\u00fd zav\u00e1dzac\u00ed obraz initramfs, sna\u017eiac sa n\u00e1js\u0165 kompromis medzi najlep\u0161ou kompresiou (men\u0161ia ve\u013ekos\u0165 s\u00faboru) a \u010dasom dekompresie. Algoritmus bezstratovej kompresie lz4 preuk\u00e1zal najv\u00fdznamnej\u0161ie v\u00fdsledky a bol pridan\u00fd do Ubuntu 19.10, \u010do umo\u017enilo zn\u00ed\u017ei\u0165 \u010das zav\u00e1dzania v porovnan\u00ed s predch\u00e1dzaj\u00facimi vydaniami (Ubuntu 18.04 a 19.04). Tento algoritmus bude zachovan\u00fd v Ubuntu 20.04.<\/p>\n<h3>Linux Lockdown Kernel<\/h3>\n<p>\nFunkcia Lockdown zvy\u0161uje bezpe\u010dnos\u0165 jadra Linuxu obmedzen\u00edm pr\u00edstupu k funkci\u00e1m, ktor\u00e9 m\u00f4\u017eu umo\u017eni\u0165 vykonanie \u013eubovo\u013en\u00e9ho k\u00f3du prostredn\u00edctvom k\u00f3du poskytnut\u00e9ho pou\u017e\u00edvate\u013esk\u00fdmi procesmi. Jednoducho povedan\u00e9, ani superu\u017e\u00edvate\u013esk\u00fd \u00fa\u010det root nem\u00f4\u017ee zmeni\u0165 k\u00f3d jadra. To pom\u00e1ha zni\u017eova\u0165 \u0161kody z potenci\u00e1lneho \u00fatoku, aj ke\u010f je \u00fa\u010det root kompromitovan\u00fd. T\u00fdm sa zvy\u0161uje aj celkov\u00e1 bezpe\u010dnos\u0165 opera\u010dn\u00e9ho syst\u00e9mu.<\/p>\n<h3>exFAT<\/h3>\n<p>\nS\u00faborov\u00fd syst\u00e9m Microsoft FAT nedovo\u013euje pren\u00e1\u0161a\u0165 s\u00fabory v\u00e4\u010d\u0161ie ako 4 GB. Aby sa toto obmedzenie obsl\u00fa\u017eilo, Microsoft vytvoril s\u00faborov\u00fd syst\u00e9m exFAT (z ang. Extended FAT \u2014 \u201eroz\u0161\u00edren\u00e1 FAT\u201c). Teraz m\u00f4\u017eete naform\u00e1tova\u0165 napr\u00edklad USB k\u013e\u00fa\u010d v exFAT pomocou <noindex><a rel=\"nofollow\" href=\"https:\/\/git.kernel.org\/pub\/scm\/linux\/kernel\/git\/torvalds\/linux.git\/commit\/?id=c48c9f7ff32b8b3965a08e40eb6763682d905b5d\">vstavan\u00fa podporu<\/a><\/noindex> s\u00faborov\u00e9ho syst\u00e9mu exFAT.<\/p>\n<h3>WireGuard<\/h3>\n<p>\nAj ke\u010f Ubuntu 20.04 nebude okam\u017eite pou\u017e\u00edva\u0165 jadro 5.6, u\u017e teraz pou\u017e\u00edva backport WireGuard v jadre 5.4. WireGuard je <noindex><a rel=\"nofollow\" href=\"https:\/\/itsfoss.com\/wireguard\/\">nov\u00e9 slovo v priemysle VPN<\/a><\/noindex>, preto zahrnutie <noindex><a rel=\"nofollow\" href=\"https:\/\/www.wireguard.com\/\">WireGuard<\/a><\/noindex> do jadra u\u017e teraz d\u00e1va v\u00fdhodu Ubuntu 20.04 v oblasti cloudu.<\/p>\n<p>Opraven\u00e9 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.phoronix.com\/scan.php?page=news_item&amp;px=High-Threads-CFS-Quota-Fix\">chyby s kv\u00f3tami CFS<\/a><\/noindex> a teraz viacvl\u00e1knov\u00e9 aplik\u00e1cie m\u00f4\u017eu pracova\u0165 r\u00fdchlej\u0161ie. Pridan\u00fd ovl\u00e1da\u010d umo\u017e\u0148uj\u00faci pr\u00e1cu so senzormi teploty a nap\u00e4tia procesorov s\u00e9rie Ryzen.<\/p>\n<p>To v\u0161etko je len zlomok noviniek, ktor\u00e9 sa objavili v jadre 5.4. S podrobn\u00fdmi preh\u013eadmi sa m\u00f4\u017eete obozn\u00e1mi\u0165 na str\u00e1nke <noindex><a rel=\"nofollow\" href=\"https:\/\/kernelnewbies.org\/Linux_5.4\">kernelnewbies.org<\/a><\/noindex> (v anglickom jazyku) a na f\u00f3re <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51881\">OpenNET<\/a><\/noindex> (v ru\u0161tine).<\/p>\n<h3>Pou\u017e\u00edvanie Kubernetes<\/h3>\n<p>\nCanonical reali\u017aovala v Ubuntu 20.04 pln\u00fa podporu <noindex><a rel=\"nofollow\" href=\"https:\/\/ubuntu.com\/blog\/kubernetes-1-18-available-from-canonical\">Kubernetes 1.18<\/a><\/noindex> so podporou <noindex><a rel=\"nofollow\" href=\"https:\/\/ubuntu.com\/kubernetes\/features\">Charmed Kubernetes<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/microk8s.io\/\">MicroK8s<\/a><\/noindex> a <noindex><a rel=\"nofollow\" href=\"https:\/\/ubuntu.com\/blog\/canonical-widens-kubernetes-support-with-kubeadm\">kubeadm<\/a><\/noindex>.<\/p>\n<p>In\u0161tal\u00e1cia Kubectl v Ubuntu 20.04:<\/p>\n<pre><code class=\"plaintext\"># snap install kubectl --classic\n\nkubectl 1.18.0 from Canonical \u2713 installed<\/code><\/pre>\n<p><\/p>\n<h3>Pou\u017e\u00edvanie SNAP<\/h3>\n<p>\nCanonical na\u010falej podporuje univerz\u00e1lny form\u00e1t bal\u00edka \u2014 snap. To je e\u0161te vidite\u013enej\u0161ie vo verzii Ubuntu 20.04. Ak sa pok\u00fasite spusti\u0165 program, ktor\u00fd nie je nain\u0161talovan\u00fd, najprv v\u00e1m pon\u00faknu jeho in\u0161tal\u00e1ciu pomocou:<\/p>\n<pre><code class=\"plaintext\"># snap install &lt;package&gt;<\/code><\/pre>\n<p>\n<img decoding=\"async\" alt=\"\u010co je nov\u00e9 v Ubuntu 20.04\" src=\"\/wp-content\/uploads\/2020\/04\/d9d5b34233f7b267e85fd83ca96a9544.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<h3>Vylep\u0161en\u00e1 podpora ZFS<\/h3>\n<p>\nAj ke\u010f <noindex><a rel=\"nofollow\" href=\"https:\/\/www.realworldtech.com\/forum\/?threadid=189711&amp;curpostid=189841\">Linus Torvalds nemus\u00ed ma\u0165 ZFS v ob\u013eube<\/a><\/noindex>, st\u00e1le zost\u00e1va popul\u00e1rnym s\u00faborov\u00fdm syst\u00e9mom a bola pridan\u00e1 jeho experiment\u00e1lna podpora od Ubuntu 19.10.<br \/>\nJe dostato\u010dne pohodln\u00fd a stabiln\u00fd na ukladanie d\u00e1t, ako dom\u00e1ci arch\u00edv alebo serverov\u00e9 \u00falo\u017eisko v pr\u00e1ci (\"z krabice\" vie viac, ako LVM). ZFS podporuje ve\u013ekosti oddielov a\u017e do 256 quadrili\u00f3nov zettabajtov (odtia\u013e p\u00edsmeno \u201eZ\u201c v n\u00e1zve) a dok\u00e1\u017ee spracov\u00e1va\u0165 s\u00fabory ve\u013ek\u00e9 a\u017e 16 exabajtov.<\/p>\n<p>ZFS vykon\u00e1va kontrolu integrity d\u00e1t, ber\u00fac do \u00favahy, ako s\u00fa ulo\u017een\u00e9 na disku. Funkcia kop\u00edrovania pri z\u00e1pise zaru\u010duje, \u017ee pou\u017e\u00edvan\u00e9 d\u00e1ta nebud\u00fa prep\u00edsan\u00e9. Namiesto toho sa nov\u00e9 inform\u00e1cie zap\u00ed\u0161u do nov\u00e9ho bloku a metad\u00e1ta s\u00faborov\u00e9ho syst\u00e9mu sa aktualizuj\u00fa, aby na\u0148 ukazovali. ZFS umo\u017e\u0148uje vytv\u00e1ra\u0165 sn\u00edmky (snapshoty s\u00faborov\u00e9ho syst\u00e9mu), ktor\u00e9 sleduj\u00fa vykonan\u00e9 zmeny v s\u00faborovom syst\u00e9me a vymie\u0148aj\u00fa si s n\u00edm d\u00e1ta, aby \u0161etrili diskov\u00fd priestor.<\/p>\n<p>ZFS prira\u010fuje kontroln\u00fd s\u00fa\u010det ka\u017ed\u00e9mu s\u00faboru na disku a neust\u00e1le overuje jeho stav na jeho z\u00e1klade. Ak zist\u00ed, \u017ee je s\u00fabor po\u0161koden\u00fd, pok\u00fasi sa ho automaticky obnovi\u0165. V in\u0161tala\u010dnom programe Ubuntu sa objavil samostatn\u00fd bod, ktor\u00fd umo\u017e\u0148uje pou\u017e\u00edvanie ZFS. O hist\u00f3rii ZFS a jej zvl\u00e1\u0161tnostiach sa m\u00f4\u017eete dozvedie\u0165 viac v blogu. <noindex><a rel=\"nofollow\" href=\"https:\/\/itsfoss.com\/what-is-zfs\/\">Je to FOSS<\/a><\/noindex>.<\/p>\n<h3>Zbohom Python 2.X<\/h3>\n<p>\nTretia verzia Pythonu bola predstaven\u00e1 u\u017e v roku 2008, ale ani 12 rokov nebolo dostato\u010dn\u00fdch na to, aby sa projekty na Python 2 prisp\u00f4sobili.<br \/>\nU\u017e v Ubuntu 15.10 sa pokusili vzda\u0165 Pythonu 2, ale jeho podpora pokra\u010dovala. A teraz, 20. apr\u00edla 2020, vy\u0161la <noindex><a rel=\"nofollow\" href=\"https:\/\/www.python.org\/downloads\/release\/python-2718\/\">Python 2.7.18<\/a><\/noindex>, ktor\u00e1 je posledn\u00fdm vydan\u00edm vetvy Pythonu 2. \u010eal\u0161ie aktualiz\u00e1cie pre\u0148 u\u017e nebud\u00fa.<\/p>\n<p>Ubuntu 20.04 u\u017e nepodporuje Python 2 a pou\u017e\u00edva Python 3.8 ako predvolen\u00fa verziu Pythonu. Bohu\u017eia\u013e, vo svete zostalo ve\u013ea projektov, ktor\u00e9 pracuj\u00fa s Python 2, a pre nich m\u00f4\u017ee by\u0165 prechod na Ubuntu 20.04 bolestiv\u00fd.<\/p>\n<p>Posledn\u00fa verziu Pythonu 2 m\u00f4\u017eete nain\u0161talova\u0165 jedn\u00fdm pr\u00edkazom:<\/p>\n<pre><code class=\"plaintext\"># apt install python2.7<\/code><\/pre>\n<p>\nOkrem Pythonu 3.8 m\u00f4\u017eu v\u00fdvoj\u00e1ri oceni\u0165 aktualizovan\u00fd s\u00fabor n\u00e1strojov, ktor\u00fd obsahuje:<\/p>\n<ul>\n<li>MySQL 8,<\/li>\n<li>glibc 2.31,<\/li>\n<li>OpenJDK 11,<\/li>\n<li>PHP 7.4,<\/li>\n<li>Perl 5.30,<\/li>\n<li>Golang 1.14.<\/li>\n<\/ul>\n<p><\/p>\n<h3>Zbohom 32 bity<\/h3>\n<p>\nU\u017e nieko\u013eko rokov Ubuntu neposkytuje ISO obrazy pre 32-bitov\u00e9 po\u010d\u00edta\u010de. Existuj\u00faci pou\u017e\u00edvatelia 32-bitov\u00fdch verzi\u00ed Ubuntu m\u00f4\u017eu prejs\u0165 na Ubuntu 18.04, ale na Ubuntu 20.04 u\u017e aktualizova\u0165 nebude mo\u017en\u00e9. To znamen\u00e1, \u017ee ak teraz pou\u017e\u00edvate 32-bitov\u00fa Ubuntu 18.04, m\u00f4\u017eete s \u0148ou zosta\u0165 do apr\u00edla 2023.<\/p>\n<h2>Ako sa aktualizova\u0165<\/h2>\n<p>\nAktualiz\u00e1cia na Ubuntu 20.04 z predch\u00e1dzaj\u00facich verzi\u00ed je ve\u013emi jednoduch\u00e1 \u2014 sta\u010d\u00ed vykona\u0165 nasleduj\u00face pr\u00edkazy:<\/p>\n<pre><code class=\"plaintext\"># sudo apt update &amp;&amp; sudo apt upgrade\n# sudo do-release-upgrade<\/code><\/pre>\n<p><\/p>\n<blockquote><p>S rados\u0165ou oznamujeme, \u017ee Ubuntu 20.04 LTS (Focal Fossa) je u\u017e dostupn\u00e1 ako obraz pre virtu\u00e1lne stroje na na\u0161ej <noindex><a rel=\"nofollow\" href=\"http:\/\/slc.tl\/-287K\">Cloudovej platforme<\/a><\/noindex>. Vytvorte si vlastn\u00fa virtu\u00e1lnu IT infra\u0161trukt\u00faru pomocou najnov\u0161ieho softv\u00e9ru!<\/p><\/blockquote>\n<p>\n<b>UPD:<\/b> Pou\u017e\u00edvatelia Ubuntu 19.10 sa m\u00f4\u017eu na 20.04 aktualizova\u0165 u\u017e teraz, zatia\u013e \u010do pou\u017e\u00edvatelia Ubuntu 18.04 sa m\u00f4\u017eu aktualizova\u0165 po vydan\u00ed 20.04.1, ktor\u00e9ho vydanie je napl\u00e1novan\u00e9 na 23. j\u00fala 2020.<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/selectel\/blog\/498526\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>23 \u0430\u043f\u0440\u0435\u043b\u044f \u0441\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0440\u0435\u043b\u0438\u0437 Ubuntu \u0432\u0435\u0440\u0441\u0438\u0438 20.04 \u0441 \u043a\u043e\u0434\u043e\u0432\u044b\u043c \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435\u043c Focal Fossa, \u044f\u0432\u043b\u044f\u044e\u0449\u0438\u043c\u0441\u044f \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u043c \u0432\u044b\u043f\u0443\u0441\u043a\u043e\u043c Ubuntu \u0434\u043b\u044f \u0434\u043e\u043b\u0433\u043e\u0441\u0440\u043e\u0447\u043d\u043e\u0439 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 (LTS) \u0438 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0435\u043d\u0438\u0435\u043c Ubuntu 18.04 LTS, \u0432\u044b\u043f\u0443\u0449\u0435\u043d\u043d\u043e\u0439 \u0432 2018 \u0433\u043e\u0434\u0443. \u041d\u0435\u043c\u043d\u043e\u0433\u043e \u043f\u0440\u043e \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f. \u0421\u043b\u043e\u0432\u043e \u00abFocal\u00bb \u043e\u0437\u043d\u0430\u0447\u0430\u0435\u0442 \u00ab\u0446\u0435\u043d\u0442\u0440\u0430\u043b\u044c\u043d\u0430\u044f \u0442\u043e\u0447\u043a\u0430\u00bb \u0438\u043b\u0438 \u00ab\u0441\u0430\u043c\u0430\u044f \u0432\u0430\u0436\u043d\u0430\u044f \u0447\u0430\u0441\u0442\u044c\u00bb, \u0442\u043e \u0435\u0441\u0442\u044c \u0441\u0432\u044f\u0437\u0430\u043d\u043e \u0441 \u043f\u043e\u043d\u044f\u0442\u0438\u0435\u043c \u0441\u0440\u0435\u0434\u043e\u0442\u043e\u0447\u0438\u044f, \u0446\u0435\u043d\u0442\u0440\u043e\u043c \u043a\u0430\u043a\u0438\u0445-\u043b\u0438\u0431\u043e \u0441\u0432\u043e\u0439\u0441\u0442\u0432, \u044f\u0432\u043b\u0435\u043d\u0438\u0439, \u0441\u043e\u0431\u044b\u0442\u0438\u0439, \u0430 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":79250,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-79249","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta 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