{"id":2189,"date":"2025-12-25T00:43:17","date_gmt":"2025-12-25T03:43:17","guid":{"rendered":"https:\/\/helpsysadmin.com.br\/blog\/?p=2189"},"modified":"2026-01-13T17:08:01","modified_gmt":"2026-01-13T20:08:01","slug":"checklist-essencial-apos-instalar-um-servidor-linux","status":"publish","type":"post","link":"https:\/\/helpsysadmin.com.br\/blog\/checklist-essencial-apos-instalar-um-servidor-linux\/","title":{"rendered":"Checklist essencial ap\u00f3s instalar um servidor Linux (AlmaLinux, Ubuntu, Debian)"},"content":{"rendered":"<div id=\"helps-4177656107\" 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 class=\"wp-block-paragraph\">Aqui est\u00e1 um <strong>checklist essencial p\u00f3s-instala\u00e7\u00e3o de um servidor <a href=\"https:\/\/helpsysadmin.com.br\/blog\/como-instalar-crowdsec\/\" data-internallinksmanager029f6b8e52c=\"1\" title=\"Como instalar Crowdsec\" target=\"_blank\" rel=\"noopener\">Linux<\/a><\/strong>, focado em <strong>AlmaLinux, Ubuntu e Debian<\/strong>, ideal para ambientes de <strong>produ\u00e7\u00e3o, VPS ou servidores dedicados<\/strong> \ud83d\udd10\ud83d\ude80<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-1-atualizacao-inicial-do-sistema\">\ud83d\udd39 1. Atualiza\u00e7\u00e3o inicial do sistema<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sempre comece garantindo que o sistema esteja atualizado.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-almalinux-rhel\">AlmaLinux \/ RHEL<\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>dnf update -y\ndnf install epel-release -y\n<\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-ubuntu-debian\">Ubuntu \/ Debian<\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>apt update &amp;&amp; apt upgrade -y\napt install curl wget unzip zip -y\n<\/pre><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-2-configurar-hostname-e-timezone\">\ud83d\udd39 2. Configurar hostname e timezone<\/h2>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>hostnamectl set-hostname servidor.exemplo.com\ntimedatectl set-timezone America\/Sao_Paulo\n<\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Verifique:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>hostnamectl\ntimedatectl\n<\/pre><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-3-criar-usuario-administrativo-nao-usar-root\">\ud83d\udd39 3. Criar usu\u00e1rio administrativo (n\u00e3o usar root)<\/h2>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>adduser admin\nusermod -aG wheel admin   # AlmaLinux\nusermod -aG sudo admin    # Ubuntu\/Debian\n<\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Teste acesso:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>su - admin\nsudo whoami\n<\/pre><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-4-hardening-do-ssh-muito-importante\">\ud83d\udd39 4. Hardening do SSH (muito importante)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Edite:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>nano \/etc\/ssh\/sshd_config\n<\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Recomenda\u00e7\u00f5es m\u00ednimas:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>PermitRootLogin no\nPasswordAuthentication no\nPubkeyAuthentication yes\nPort 2222\n<\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Reinicie:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>systemctl restart sshd\n<\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udccc <strong>Nunca feche sua sess\u00e3o antes de testar o novo acesso SSH.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-5-configurar-autenticacao-por-chave-ssh\">\ud83d\udd39 5. Configurar autentica\u00e7\u00e3o por chave SSH<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">No computador local:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>ssh-keygen -t rsa -b 4096\nssh-copy-id admin@IP_DO_SERVIDOR -p 2222\n<\/pre><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-6-firewall-basico-obrigatorio\">\ud83d\udd39 6. Firewall b\u00e1sico (obrigat\u00f3rio)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-almalinux-firewalld\">AlmaLinux \u2013 Firewalld<\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>dnf install firewalld -y\nsystemctl enable --now firewalld\n\nfirewall-cmd --permanent --add-port=2222\/tcp\nfirewall-cmd --permanent --add-service=http\nfirewall-cmd --permanent --add-service=https\nfirewall-cmd --reload\n<\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-ubuntu-debian-ufw\">Ubuntu \/ Debian \u2013 UFW<\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>ufw allow 2222\/tcp\nufw allow 80\/tcp\nufw allow 443\/tcp\nufw enable\n<\/pre><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-7-protecao-contra-brute-force\">\ud83d\udd39 7. Prote\u00e7\u00e3o contra brute force<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Veja Mais: <a href=\"https:\/\/helpsysadmin.com.br\/blog\/como-instalar-crowdsec\/\" target=\"_blank\" rel=\"noreferrer noopener\">Como instalar Crowdsec<\/a><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-8-desativar-servicos-desnecessarios\">\ud83d\udd39 8. Desativar servi\u00e7os desnecess\u00e1rios<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Liste servi\u00e7os ativos:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>systemctl list-units --type=service --state=running\n<\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Desabilite o que n\u00e3o for usar:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>systemctl disable --now servi\u00e7o\n<\/pre><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-9-configurar-limites-do-sistema-producao\">\ud83d\udd39 9. Configurar limites do sistema (produ\u00e7\u00e3o)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Edite:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>nano \/etc\/security\/limits.conf\n<\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Exemplo:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>* soft nofile 65535\n* hard nofile 65535\n<\/pre><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-10-ativar-atualizacoes-automaticas-de-seguranca\">\ud83d\udd39 10. Ativar atualiza\u00e7\u00f5es autom\u00e1ticas de seguran\u00e7a<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-almalinux\">AlmaLinux<\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>dnf install dnf-automatic -y\nsystemctl enable --now dnf-automatic.timer\n<\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-ubuntu-debian-0\">Ubuntu \/ Debian<\/h3>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>apt install unattended-upgrades -y\ndpkg-reconfigure unattended-upgrades\n<\/pre><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-11-monitoramento-basico\">\ud83d\udd39 11. Monitoramento b\u00e1sico<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Instale ferramentas \u00fateis:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>dnf install htop iotop net-tools -y\napt install htop iotop net-tools -y\n<\/pre><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-12-configurar-logs-e-auditoria\">\ud83d\udd39 12. Configurar logs e auditoria<\/h2>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>journalctl -xe\nlogrotate -f \/etc\/logrotate.conf\n<\/pre><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-13-backup-nunca-ignore\">\ud83d\udd39 13. Backup (nunca ignore)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u2714 Defina:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>O que ser\u00e1 salvo<\/li>\n\n\n\n<li>Onde (local, remoto, S3, outro servidor)<\/li>\n\n\n\n<li>Frequ\u00eancia<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ferramentas comuns:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>rsync<\/code><\/li>\n\n\n\n<li><code>borgbackup<\/code><\/li>\n\n\n\n<li><code>rclone<\/code><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-14-verificacoes-finais\">\ud83d\udd39 14. Verifica\u00e7\u00f5es finais<\/h2>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>free -h\ndf -h\nuptime\nss -tulpn\n<\/pre><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-checklist-rapido-resumo\">\u2705 Checklist r\u00e1pido (resumo)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u2714 Sistema atualizado<br>\u2714 Usu\u00e1rio sudo criado<br>\u2714 SSH seguro (sem root, sem senha)<br>\u2714 Firewall ativo<br>\u2714 <a href=\"https:\/\/helpsysadmin.com.br\/blog\/fail2ban-vs-crowdsec-em-producao\/\" data-internallinksmanager029f6b8e52c=\"4\" title=\"Fail2Ban vs CrowdSec em Produ\u00e7\u00e3o: Qual \u00e9 a Melhor Solu\u00e7\u00e3o de Seguran\u00e7a para Servidores Linux?\" target=\"_blank\" rel=\"noopener\">Fail2ban<\/a> configurado<br>\u2714 Timezone correto<br>\u2714 Backups definidos<br>\u2714 Monitoramento b\u00e1sico<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/helpsysadmin.com.br\" target=\"_blank\" rel=\"noreferrer noopener\">Clique aqui e consulte nossos planos de Gerenciamento de Servidor<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aqui est\u00e1 um checklist essencial p\u00f3s-instala\u00e7\u00e3o de um servidor Linux, focado em AlmaLinux, Ubuntu e Debian, ideal para ambientes de produ\u00e7\u00e3o, VPS [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":2193,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,1921,89],"tags":[],"class_list":["post-2189","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gerenciamento-servidor","category-rede","category-seguranca-do-servidor"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.9 (Yoast SEO v27.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Checklist 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