{"id":3288,"date":"2026-02-12T10:00:00","date_gmt":"2026-02-12T13:00:00","guid":{"rendered":"https:\/\/helpsysadmin.com.br\/blog\/?p=3288"},"modified":"2026-04-20T15:23:22","modified_gmt":"2026-04-20T18:23:22","slug":"estrutura-arquivos-permissoes-linux-servidores-web","status":"publish","type":"post","link":"https:\/\/helpsysadmin.com.br\/blog\/estrutura-arquivos-permissoes-linux-servidores-web\/","title":{"rendered":"Estrutura de Arquivos e Permiss\u00f5es Linux para Servidores Web"},"content":{"rendered":"<div id=\"helps-2823384612\" 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>Permiss\u00f5es <a href=\"https:\/\/helpsysadmin.com.br\/blog\/como-instalar-crowdsec\/\" data-internallinksmanager029f6b8e52c=\"1\" title=\"Como instalar Crowdsec\" target=\"_blank\" rel=\"noopener\">Linux<\/a> servidor web. Vamos organizar isso de forma completa e pr\u00e1tica, cobrindo <strong>estrutura de arquivos no Linux\/servidor<\/strong> e <strong>permiss\u00f5es<\/strong>, de maneira que fique f\u00e1cil de entender e aplicar.<\/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-estrutura-de-arquivos-em-sistemas-linux\">1\ufe0f\u20e3 Estrutura de arquivos em sistemas Linux<\/h2>\n\n\n\n<p>O Linux segue um <strong>hierarquia padr\u00e3o de diret\u00f3rios<\/strong> (Filesystem Hierarchy Standard \u2013 FHS). Aqui est\u00e3o os principais diret\u00f3rios que voc\u00ea vai encontrar:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Diret\u00f3rio<\/th><th>Finalidade principal<\/th><\/tr><\/thead><tbody><tr><td><code>\/<\/code><\/td><td>Diret\u00f3rio raiz. Todos os arquivos e diret\u00f3rios est\u00e3o dentro dele.<\/td><\/tr><tr><td><code>\/bin<\/code><\/td><td>Comandos essenciais do sistema, dispon\u00edveis para todos os usu\u00e1rios. Ex: <code>ls<\/code>, <code>cat<\/code>.<\/td><\/tr><tr><td><code>\/sbin<\/code><\/td><td>Comandos de administra\u00e7\u00e3o do sistema, geralmente s\u00f3 para root. Ex: <code>iptables<\/code>.<\/td><\/tr><tr><td><code>\/usr<\/code><\/td><td>Programas, bibliotecas e documenta\u00e7\u00e3o de usu\u00e1rio. Subdiret\u00f3rios comuns: <code>\/usr\/bin<\/code>, <code>\/usr\/lib<\/code>.<\/td><\/tr><tr><td><code>\/usr\/local<\/code><\/td><td>Software instalado manualmente (fora do gerenciador de pacotes).<\/td><\/tr><tr><td><code>\/etc<\/code><\/td><td>Arquivos de configura\u00e7\u00e3o do sistema e servi\u00e7os. Ex: <code>\/etc\/passwd<\/code>, <code>\/etc\/ssh\/sshd_config<\/code>.<\/td><\/tr><tr><td><code>\/var<\/code><\/td><td>Dados vari\u00e1veis: logs, bancos de dados, emails. Ex: <code>\/var\/log<\/code>, <code>\/var\/www<\/code>.<\/td><\/tr><tr><td><code>\/home<\/code><\/td><td>Diret\u00f3rios pessoais dos usu\u00e1rios. Ex: <code>\/home\/germano<\/code>.<\/td><\/tr><tr><td><code>\/tmp<\/code><\/td><td>Arquivos tempor\u00e1rios. Normalmente limpo a cada rein\u00edcio.<\/td><\/tr><tr><td><code>\/dev<\/code><\/td><td>Arquivos de dispositivos (hardware). Ex: <code>\/dev\/sda<\/code>.<\/td><\/tr><tr><td><code>\/proc<\/code><\/td><td>Sistema de arquivos virtual com informa\u00e7\u00f5es do kernel e processos. Ex: <code>\/proc\/cpuinfo<\/code>.<\/td><\/tr><tr><td><code>\/lib<\/code><\/td><td>Bibliotecas essenciais do sistema. Ex: <code>\/lib\/x86_64-linux-gnu\/<\/code>.<\/td><\/tr><\/tbody><\/table><\/figure>\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-permissoes-de-arquivos-e-diretorios\">2\ufe0f\u20e3 Permiss\u00f5es de arquivos e diret\u00f3rios<\/h2>\n\n\n\n<p>Cada arquivo ou diret\u00f3rio tem <strong>3 tipos de permiss\u00e3o<\/strong>:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Leitura (r)<\/strong> \u2013 Pode ver o conte\u00fado do arquivo ou listar o diret\u00f3rio.<\/li>\n\n\n\n<li><strong>Escrita (w)<\/strong> \u2013 Pode modificar o arquivo ou criar\/excluir arquivos no diret\u00f3rio.<\/li>\n\n\n\n<li><strong>Execu\u00e7\u00e3o (x)<\/strong> \u2013 Pode executar o arquivo (se for um programa) ou entrar no diret\u00f3rio.<\/li>\n<\/ol>\n\n\n\n<p>E essas permiss\u00f5es s\u00e3o divididas entre <strong>3 categorias de usu\u00e1rios<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Categoria<\/th><th>Significado<\/th><\/tr><\/thead><tbody><tr><td><strong>u (user)<\/strong><\/td><td>Dono do arquivo<\/td><\/tr><tr><td><strong>g (group)<\/strong><\/td><td>Grupo do arquivo<\/td><\/tr><tr><td><strong>o (others)<\/strong><\/td><td>Todos os outros usu\u00e1rios<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Exemplo de <code>ls -l<\/code>:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>-rwxr-xr--\n<\/pre><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>rwx<\/code> \u2192 dono pode ler, escrever e executar<\/li>\n\n\n\n<li><code>r-x<\/code> \u2192 grupo pode ler e executar, mas n\u00e3o escrever<\/li>\n\n\n\n<li><code>r--<\/code> \u2192 outros podem apenas ler<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-1-modificando-permissoes\">2.1 Modificando permiss\u00f5es<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Usando s\u00edmbolos<\/strong>:<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>chmod u+x arquivo.txt   # adiciona permiss\u00e3o de execu\u00e7\u00e3o ao dono\nchmod g-w arquivo.txt   # remove permiss\u00e3o de escrita do grupo\nchmod o+r arquivo.txt   # adiciona permiss\u00e3o de leitura para outros\n<\/pre><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Usando n\u00fameros (octal)<\/strong>:<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Valor<\/th><th>Permiss\u00e3o<\/th><\/tr><\/thead><tbody><tr><td>0<\/td><td>&#8212;<\/td><\/tr><tr><td>1<\/td><td>&#8211;x<\/td><\/tr><tr><td>2<\/td><td>-w-<\/td><\/tr><tr><td>3<\/td><td>-wx<\/td><\/tr><tr><td>4<\/td><td>r&#8211;<\/td><\/tr><tr><td>5<\/td><td>r-x<\/td><\/tr><tr><td>6<\/td><td>rw-<\/td><\/tr><tr><td>7<\/td><td>rwx<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Exemplo:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>chmod 754 arquivo.txt\n# 7 = rwx dono\n# 5 = r-x grupo\n# 4 = r-- outros\n<\/pre><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-2-proprietario-e-grupo\">2.2 Propriet\u00e1rio e grupo<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Para ver dono e grupo: <code>ls -l arquivo.txt<\/code><\/li>\n\n\n\n<li>Para alterar dono: <code>chown usuario arquivo.txt<\/code><\/li>\n\n\n\n<li>Para alterar grupo: <code>chgrp grupo arquivo.txt<\/code><\/li>\n<\/ul>\n\n\n\n<p>Exemplo:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>chown germano arquivo.txt\nchgrp admins arquivo.txt\n<\/pre><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-3-permissoes-especiais\">2.3 Permiss\u00f5es especiais<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>SUID (Set User ID)<\/strong>: executa com permiss\u00f5es do dono do arquivo.<\/li>\n\n\n\n<li><strong>SGID (Set Group ID)<\/strong>: executa com permiss\u00f5es do grupo ou herda grupo em diret\u00f3rios.<\/li>\n\n\n\n<li><strong>Sticky bit<\/strong>: em diret\u00f3rios, s\u00f3 permite que o dono exclua arquivos pr\u00f3prios. Ex: <code>\/tmp<\/code>.<\/li>\n<\/ul>\n\n\n\n<p>Exemplo:<\/p>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>chmod 4755 programa    # SUID\nchmod 2755 pasta       # SGID\nchmod +t \/tmp          # Sticky bit<\/pre><\/div>\n\n\n\n<p>Vamos criar um <strong>mapa visual da estrutura de diret\u00f3rios do Linux<\/strong> com permiss\u00f5es recomendadas para <strong>servidores web<\/strong>, destacando o que \u00e9 seguro para produ\u00e7\u00e3o.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Estrutura de diret\u00f3rios Linux \u2013 Servidor Web<\/h2>\n\n\n\n<div class=\"wp-block-codemirror-blocks-code-block code-block\"><pre>\/\n\u251c\u2500\u2500 bin\/           # Comandos essenciais\n\u2502   \u2514\u2500\u2500 perm: 755\n\u251c\u2500\u2500 sbin\/          # Comandos administrativos\n\u2502   \u2514\u2500\u2500 perm: 755\n\u251c\u2500\u2500 etc\/           # Configura\u00e7\u00f5es do sistema\n\u2502   \u2514\u2500\u2500 perm: 755\n\u2502       \u2514\u2500\u2500 sshd_config, nginx.conf, etc.: 600-644\n\u251c\u2500\u2500 var\/           # Dados vari\u00e1veis\n\u2502   \u251c\u2500\u2500 log\/       # Logs do sistema e servi\u00e7os\n\u2502   \u2502   \u2514\u2500\u2500 perm: 755 (arquivos: 600-644)\n\u2502   \u251c\u2500\u2500 www\/       # Diret\u00f3rios de sites\n\u2502   \u2502   \u2514\u2500\u2500 perm: 755 (arquivos do site: 644)\n\u2502   \u2514\u2500\u2500 tmp\/       # Tempor\u00e1rios\n\u2502       \u2514\u2500\u2500 perm: 1777 (sticky bit)\n\u251c\u2500\u2500 home\/          # Diret\u00f3rios de usu\u00e1rios\n\u2502   \u2514\u2500\u2500 usuario\/   # Seu usu\u00e1rio\n\u2502       \u2514\u2500\u2500 perm: 700-750 (seguran\u00e7a pessoal)\n\u251c\u2500\u2500 usr\/           # Software e bibliotecas\n\u2502   \u251c\u2500\u2500 bin\/       # Programas instalados\n\u2502   \u2502   \u2514\u2500\u2500 perm: 755\n\u2502   \u2514\u2500\u2500 local\/     # Softwares instalados manualmente\n\u2502       \u2514\u2500\u2500 perm: 755\n\u251c\u2500\u2500 lib\/           # Bibliotecas essenciais\n\u2502   \u2514\u2500\u2500 perm: 755\n\u251c\u2500\u2500 dev\/           # Dispositivos do sistema\n\u2502   \u2514\u2500\u2500 perm: 600-666 (gerido pelo kernel)\n\u251c\u2500\u2500 proc\/          # Sistema de arquivos virtual\n\u2502   \u2514\u2500\u2500 perm: 555 (somente leitura)\n\u2514\u2500\u2500 tmp\/           # Tempor\u00e1rios\n    \u2514\u2500\u2500 perm: 1777 (sticky bit)\n<\/pre><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udca1 Dicas de permiss\u00f5es para servidores web<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Arquivos do site:<\/strong> 644 (leitura para todos, escrita s\u00f3 para dono) <code>chmod 644 \/var\/www\/html\/index.php<\/code><\/li>\n\n\n\n<li><strong>Pastas do site:<\/strong> 755 (leitura e execu\u00e7\u00e3o para todos, escrita s\u00f3 para dono) <code>chmod 755 \/var\/www\/html<\/code><\/li>\n\n\n\n<li><strong>Arquivos sens\u00edveis de configura\u00e7\u00e3o:<\/strong> 600-640 <code>chmod 600 \/etc\/nginx\/nginx.conf<\/code><\/li>\n\n\n\n<li><strong>Diret\u00f3rios tempor\u00e1rios:<\/strong> 1777 (sticky bit) <code>chmod 1777 \/tmp<\/code><\/li>\n\n\n\n<li><strong>Evitar 777:<\/strong> nunca d\u00ea permiss\u00e3o total para todos, risco de invas\u00e3o.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-opt-id=1743151204  fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mlkpd8g42nae.i.optimole.com\/w:1024\/h:683\/q:mauto\/f:best\/https:\/\/helpsysadmin.com.br\/blog\/wp-content\/uploads\/2026\/02\/estrutura_de_diretorios_linux.webp\" alt=\"estrutura de diret\u00f3rios linux\" class=\"wp-image-3289\" srcset=\"https:\/\/mlkpd8g42nae.i.optimole.com\/w:1024\/h:683\/q:mauto\/f:best\/https:\/\/helpsysadmin.com.br\/blog\/wp-content\/uploads\/2026\/02\/estrutura_de_diretorios_linux.webp 1024w, https:\/\/mlkpd8g42nae.i.optimole.com\/w:300\/h:200\/q:mauto\/f:best\/https:\/\/helpsysadmin.com.br\/blog\/wp-content\/uploads\/2026\/02\/estrutura_de_diretorios_linux.webp 300w, https:\/\/mlkpd8g42nae.i.optimole.com\/w:768\/h:512\/q:mauto\/f:best\/https:\/\/helpsysadmin.com.br\/blog\/wp-content\/uploads\/2026\/02\/estrutura_de_diretorios_linux.webp 768w, https:\/\/mlkpd8g42nae.i.optimole.com\/w:1000\/h:667\/q:mauto\/f:best\/https:\/\/helpsysadmin.com.br\/blog\/wp-content\/uploads\/2026\/02\/estrutura_de_diretorios_linux.webp 1000w, https:\/\/mlkpd8g42nae.i.optimole.com\/w:230\/h:153\/q:mauto\/f:best\/https:\/\/helpsysadmin.com.br\/blog\/wp-content\/uploads\/2026\/02\/estrutura_de_diretorios_linux.webp 230w, https:\/\/mlkpd8g42nae.i.optimole.com\/w:350\/h:233\/q:mauto\/f:best\/https:\/\/helpsysadmin.com.br\/blog\/wp-content\/uploads\/2026\/02\/estrutura_de_diretorios_linux.webp 350w, https:\/\/mlkpd8g42nae.i.optimole.com\/w:480\/h:320\/q:mauto\/f:best\/https:\/\/helpsysadmin.com.br\/blog\/wp-content\/uploads\/2026\/02\/estrutura_de_diretorios_linux.webp 480w, https:\/\/mlkpd8g42nae.i.optimole.com\/w:1536\/h:1024\/q:mauto\/f:best\/https:\/\/helpsysadmin.com.br\/blog\/wp-content\/uploads\/2026\/02\/estrutura_de_diretorios_linux.webp 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-faq\">FAQ<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1770751256503\"><strong class=\"schema-faq-question\">Quais s\u00e3o as permiss\u00f5es recomendadas para arquivos de sites no Linux?<\/strong> <p class=\"schema-faq-answer\">Para arquivos de sites, use 644 (leitura para todos, escrita s\u00f3 para o dono). Para pastas, use 755.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1770751278831\"><strong class=\"schema-faq-question\">O que \u00e9 o sticky bit e onde ele \u00e9 usado?<\/strong> <p class=\"schema-faq-answer\">O sticky bit protege diret\u00f3rios tempor\u00e1rios, permitindo que apenas o dono exclua arquivos. Exemplo: <code>\/tmp<\/code> com permiss\u00e3o 1777.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1770751318293\"><strong class=\"schema-faq-question\">Por que n\u00e3o devo usar permiss\u00e3o 777 em servidores web?<\/strong> <p class=\"schema-faq-answer\">Permiss\u00e3o 777 permite que qualquer usu\u00e1rio modifique arquivos, aumentando o risco de invas\u00e3o.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1770751337711\"><strong class=\"schema-faq-question\">Qual a diferen\u00e7a entre dono, grupo e outros no Linux?<\/strong> <p class=\"schema-faq-answer\">Dono \u00e9 o usu\u00e1rio que possui o arquivo, grupo define permiss\u00f5es para usu\u00e1rios do mesmo grupo, e outros aplica a todos os demais.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1770751369825\"><strong class=\"schema-faq-question\">Como proteger arquivos de configura\u00e7\u00e3o sens\u00edveis no Linux?<\/strong> <p class=\"schema-faq-answer\">Configure permiss\u00f5es 600-640 para arquivos cr\u00edticos como <code>\/etc\/nginx\/nginx.conf<\/code>, garantindo que apenas o root ou o dono possa l\u00ea-los.<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Permiss\u00f5es Linux servidor web. Vamos organizar isso de forma completa e pr\u00e1tica, cobrindo estrutura de arquivos no Linux\/servidor e permiss\u00f5es, de maneira [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":3290,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4187],"tags":[2416,3383,13,3381,18,3379],"class_list":["post-3288","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-monitoramento-e-troubleshooting","tag-administracao-de-sistemas","tag-diretorios-linux","tag-linux","tag-permissoes-linux","tag-seguranca","tag-servidor-web-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Estrutura de Arquivos e Permiss\u00f5es Linux para Servidores Web<\/title>\n<meta name=\"description\" content=\"Aprenda a organizar diret\u00f3rios Linux e 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