{"id":1031,"date":"2024-05-06T21:42:26","date_gmt":"2024-05-07T00:42:26","guid":{"rendered":"https:\/\/helpsysadmin.com.br\/blog\/?p=1031"},"modified":"2026-05-12T01:21:17","modified_gmt":"2026-05-12T04:21:17","slug":"adicionando-excluindo-privilegios-sudo","status":"publish","type":"post","link":"https:\/\/helpsysadmin.com.br\/blog\/adicionando-excluindo-privilegios-sudo\/","title":{"rendered":"Adicionando, excluindo e concedendo privil\u00e9gios Sudo para usu\u00e1rios no Ubuntu 22.04 LTS"},"content":{"rendered":"<div id=\"helps-4122578910\" class=\"helps-before-content-2 helps-entity-placement\"><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3661896953164277\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- 2anuncios display quadrado -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-3661896953164277\"\r\n     data-ad-slot=\"5051229894\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n<p>Este tutorial explica como adicionar, excluir e conceder privil\u00e9gios Sudo para usu\u00e1rios no sistema operacional Ubuntu <a href=\"https:\/\/helpsysadmin.com.br\/blog\/como-instalar-crowdsec\/\" data-internallinksmanager029f6b8e52c=\"1\" title=\"Como instalar Crowdsec\" target=\"_blank\" rel=\"noopener\">Linux<\/a>. O guia \u00e9 oficialmente testado nas edi\u00e7\u00f5es Ubuntu 22.04 e 20.04 LTS..<\/p>\n\n\n\n<p>Antes de entrar no tema, vamos ver o que \u00e9 sudo e seus benef\u00edcios.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-1-o-que-e-sudo\">1. O que \u00e9 sudo?<\/h2>\n\n\n\n<p>Nos sistemas operacionais Linux e Unix, h\u00e1 um usu\u00e1rio especial chamado &#8211; root. O usu\u00e1rio root pode fazer tudo e qualquer coisa em um sistema Linux ou Unix.<\/p>\n\n\n\n<p>Usar o usu\u00e1rio root para as atividades do dia a dia pode ser perigoso e n\u00e3o \u00e9 recomendado. Um comando errado pode destruir todo o sistema! \u00c9 a\u00ed que entra o &#8220;sudo&#8221;.<\/p>\n\n\n\n<p>Sudo permite que os usu\u00e1rios autorizados executem tarefas com privil\u00e9gios de n\u00edvel root, mesmo que n\u00e3o saibam a senha do usu\u00e1rio root.<\/p>\n\n\n\n<p>\u00c9 por isso que \u00e9 importante criar um usu\u00e1rio regular e adicion\u00e1-lo ao grupo de usu\u00e1rios sudo para executar tarefas administrativas. Portanto, esse usu\u00e1rio pode atuar tanto como usu\u00e1rio regular quanto como usu\u00e1rio administrativo ao executar comandos prefixados com sudo.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-2-beneficios-de-ser-sudo\">2. Benef\u00edcios de ser Sudo<\/h2>\n\n\n\n<p>Voc\u00ea n\u00e3o precisa compartilhar a senha root com outros usu\u00e1rios. <\/p>\n\n\n\n<p>Os usu\u00e1rios n\u00e3o precisam saber a senha do usu\u00e1rio root para realizar tarefas administrativas. <\/p>\n\n\n\n<p>Ao realizar uma tarefa administrativa, os usu\u00e1rios ser\u00e3o solicitados a fornecer a senha do sudo antes que qualquer altera\u00e7\u00e3o possa ocorrer no sistema. Deve fazer com que os usu\u00e1rios pensem nas consequ\u00eancias do que est\u00e3o fazendo. <\/p>\n\n\n\n<p>Os direitos de administrador podem ser facilmente concedidos aos usu\u00e1rios e revogados a qualquer momento, caso n\u00e3o sejam mais necess\u00e1rios. <\/p>\n\n\n\n<p>Algumas distribui\u00e7\u00f5es Linux, por exemplo, Ubuntu, desabilitam o usu\u00e1rio root por padr\u00e3o, portanto, n\u00e3o h\u00e1 como lan\u00e7ar ataques de for\u00e7a bruta no usu\u00e1rio root. Mesmo que algu\u00e9m tente, seria in\u00fatil, porque n\u00e3o h\u00e1 senha de root para quebrar. <\/p>\n\n\n\n<p>Mais importante, a sess\u00e3o do sudo ser\u00e1 encerrada ap\u00f3s um curto per\u00edodo. Caso voc\u00ea tenha deixado o terminal aberto ap\u00f3s executar alguns comandos com a permiss\u00e3o sudo, a autentica\u00e7\u00e3o expira automaticamente. Portanto, os outros usu\u00e1rios n\u00e3o podem realizar outras tarefas administrativas. Por padr\u00e3o, a senha sudo \u00e9 lembrada por 15 minutos na sess\u00e3o atual. Depois disso, voc\u00ea precisa digitar a senha novamente. <\/p>\n\n\n\n<p>Voc\u00ea pode monitorar a atividade de linha de comando dos usu\u00e1rios sudo. sudo adiciona uma entrada de log dos comandos executados pelos usu\u00e1rios no arquivo \/var\/log\/auth.log . Se houver um problema, voc\u00ea pode examinar esses comandos e tentar descobrir o que deu errado.<\/p>\n\n\n\n<p>Estas s\u00e3o algumas vantagens de ser um usu\u00e1rio sudo. Agora, vamos ver como adicionar, excluir e conceder privil\u00e9gios Sudo a usu\u00e1rios no Ubuntu Linux.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-adicionar-novo-usuario-no-ubuntu-linux\">Adicionar novo usu\u00e1rio no Ubuntu Linux<\/h2>\n\n\n\n<p>Primeiro, vamos criar um usu\u00e1rio comum, por exemplo <strong>&#8220;helpsysadmin&#8221;<\/strong> .<\/p>\n\n\n\n<p>Execute<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>sudo adduser helpsysadmin<\/pre><\/div>\n\n\n\n<p>Substitua helpsysadmin pelo nome de usu\u00e1rio que desejar.<\/p>\n\n\n\n<p>Informe sua senha <\/p>\n\n\n\n<p><strong>exemplo de sa\u00edda<\/strong>:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>Adding user helpsysadmin' ... Adding new grouphelpsysadmin' (1001) \u2026\nAdding new user helpsysadmin' (1000) with grouphelpsysadmin' \u2026\nCreating home directory \/home\/helpsysadmin' ... Copying files from\/etc\/skel' \u2026\nEnter new UNIX password:\nRetype new UNIX password:\npasswd: password updated successfully\nChanging the user information for helpsysadmin\nEnter the new value, or press ENTER for the default\nFull Name []:\nRoom Number []:\nWork Phone []:\nHome Phone []:\nOther []:\nIs the information correct? [Y\/n] y<\/pre><\/div>\n\n\n\n<p><br>Acabamos de criar um novo usu\u00e1rio chamado &#8220;helpsysadmin&#8221;. Este usu\u00e1rio ainda n\u00e3o recebeu acesso sudo, portanto, ele n\u00e3o pode executar nenhuma tarefa administrativa.<\/p>\n\n\n\n<p>Voc\u00ea pode verificar se um usu\u00e1rio tem acesso sudo ou n\u00e3o, com o comando abaixo<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>sudo -l -U helpsysadmin<\/pre><\/div>\n\n\n\n<p>voc\u00ea ver\u00e1:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>User helpsysadmin is not allowed to run sudo on server<\/pre><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conceder-privilegios-sudo-aos-usuarios-no-ubuntu-linux\">Conceder privil\u00e9gios Sudo aos usu\u00e1rios no Ubuntu Linux<\/h2>\n\n\n\n<p>Adicione o usu\u00e1rio rec\u00e9m-criado ao <strong>grupo sudo<\/strong> usando o seguinte comando:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>usermod -aG sudo helpsysadmin<\/pre><\/div>\n\n\n\n<p>Para testar que as novas permiss\u00f5es <code>sudo<\/code> est\u00e3o em funcionamento, utilize primeiro o comando <code>su<\/code> para trocar para a nova conta de usu\u00e1rio:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>su - helpsysadmin<\/pre><\/div>\n\n\n\n<p>Como o novo usu\u00e1rio, verifique se consegue usar o <code>sudo<\/code>, colocando <code>sudo<\/code> antes do comando que deseja executar com privil\u00e9gios de superusu\u00e1rio. exemplo<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>sudo apt update\nsudo apt upgrade<\/pre><\/div>\n\n\n\n<p>Um usu\u00e1rio comum n\u00e3o teria permiss\u00e3o de executar os comandos acima<\/p>\n\n\n\n<p>A primeira vez que usar o <code>sudo<\/code> em uma sess\u00e3o, ser\u00e1 solicitada a senha da conta daquele usu\u00e1rio. Digite a senha para continuar:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>Output:\n[sudo] password for helpsysadmin:<\/pre><\/div>\n\n\n\n<p>Se o usu\u00e1rio estiver no grupo correto e voc\u00ea digitar a senha corretamente, o comando que emitiu com <code>sudo<\/code> ser\u00e1 executado com privil\u00e9gios <strong>root<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Este tutorial explica como adicionar, excluir e conceder privil\u00e9gios Sudo para usu\u00e1rios no sistema operacional Ubuntu Linux. O guia \u00e9 oficialmente testado [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":1045,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,89],"tags":[13,18,3,16],"class_list":["post-1031","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gerenciamento-servidor","category-seguranca-do-servidor","tag-linux","tag-seguranca","tag-servidor-linux","tag-ubuntu"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Adicionando, excluindo e concedendo privil\u00e9gios Sudo para usu\u00e1rios no Ubuntu 22.04 LTS - Blog HelpSysAdmin<\/title>\n<meta name=\"description\" content=\"Blog HelpSysAdmin - Adicionando, excluindo e concedendo privil\u00e9gios Sudo para usu\u00e1rios no Ubuntu 22.04 LTS\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/helpsysadmin.com.br\/blog\/adicionando-excluindo-privilegios-sudo\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Adicionando, excluindo e concedendo privil\u00e9gios Sudo para usu\u00e1rios no Ubuntu 22.04 LTS\" \/>\n<meta property=\"og:description\" content=\"Blog HelpSysAdmin - 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