VPS SSD Hosting<\/a> plan or a dedicated server, you’ll have the root access needed to fix these properly \u2014 shared hosting users may need to work within cPanel’s File Manager or contact support.<\/p>\nThis article covers how to read Linux file permissions, how to fix ownership with chown<\/code>, how to set correct permission modes with chmod<\/code>, and what to do when the obvious fix doesn’t work.<\/p>\nPrerequisites<\/h2>\n\nSSH access to your server (root or sudo user), or<\/strong> access to cPanel File Manager<\/li>\nBasic familiarity with a terminal \u2014 you don’t need to be an expert, but you’ll need to run commands<\/li>\n Knowledge of which user your web server runs as (common values: www-data<\/code> on Ubuntu\/Debian, apache<\/code> on CentOS\/AlmaLinux, nobody<\/code> on some cPanel stacks)<\/li>\nThe path to the file or directory causing the error<\/li>\n<\/ul>\nStep 1 \u2014 Read the Current Permissions<\/h2>\n Before changing anything, check what the permissions actually are. Run ls -la<\/code> on the file or directory in question. The -a<\/code> flag shows hidden files, and -l<\/code> gives the long format with permissions visible.<\/p>\n<\/button>Copied to clipboard<\/span><\/p>\nls -la \/var\/www\/html\/mysite\/<\/code><\/pre>\n<\/div>\nYou’ll see output like this:<\/p>\n
<\/button>Copied to clipboard<\/span><\/p>\ndrwxr-xr-x 3 root root 4096 Jan 10 09:15 mysite\n-rw-r--r-- 1 root root 1234 Jan 10 09:15 index.php\n-rw------- 1 root root 512 Jan 10 09:15 config.php<\/code><\/pre>\n<\/div>\nHere’s how to read those permission strings:<\/p>\n
\nThe first character is the type: d<\/code> = directory, -<\/code> = file, l<\/code> = symlink<\/li>\nThe next 9 characters are three groups of three: owner<\/strong>, group<\/strong>, others<\/strong><\/li>\nEach group: r<\/code> = read, w<\/code> = write, x<\/code> = execute (or -<\/code> if not set)<\/li>\nThe two columns after the permissions show the owner<\/strong> and group<\/strong><\/li>\n<\/ul>\nIn the example above, config.php<\/code> is set to rw-------<\/code>, meaning only root<\/code> can read or write it. If your web server process is running as www-data<\/code>, it’ll get a Permission Denied error trying to read that file.<\/p>\nStep 2 \u2014 Fix Ownership with chown<\/h2>\n chown<\/code> changes who owns a file or directory. This is often the actual fix when your web server can’t access files you uploaded as a different user.<\/p>\nTo change the owner of a single file:<\/p>\n
<\/button>Copied to clipboard<\/span><\/p>\nsudo chown www-data:www-data \/var\/www\/html\/mysite\/config.php<\/code><\/pre>\n<\/div>\nTo change ownership recursively for an entire directory (use with care \u2014 see the warning below):<\/p>\n
<\/button>Copied to clipboard<\/span><\/p>\nsudo chown -R www-data:www-data \/var\/www\/html\/mysite\/<\/code><\/pre>\n<\/div>\nThe format is chown user:group<\/code>. You can omit the group if you only need to change the owner: chown www-data file.php<\/code>.<\/p>\n\ud83d\udcdd Note:<\/strong> On cPanel servers, files are typically owned by the cPanel account username (e.g., myaccount<\/code>) rather than www-data<\/code>. Check your actual username with whoami<\/code> and use that instead.<\/p>\n\u26a0 Warning:<\/strong> Running chown -R root:root \/var\/www\/<\/code> recursively as root will break your site \u2014 your web server won’t be able to read anything. Always double-check the user and path before using -R<\/code>.<\/p>\nStep 3 \u2014 Fix Permission Bits with chmod<\/h2>\n Even with correct ownership, wrong permission bits will still cause denials. chmod<\/code> sets what the owner, group, and others are allowed to do with a file.<\/p>\nFor most web hosting scenarios, you want:<\/p>\n
\nFiles:<\/strong> 644<\/code> \u2014 owner can read\/write, group and others can read only<\/li>\nDirectories:<\/strong> 755<\/code> \u2014 owner can read\/write\/enter, group and others can read and enter<\/li>\nScripts that need to execute:<\/strong> 755<\/code><\/li>\nSensitive config files (e.g., wp-config.php):<\/strong> 640<\/code> or 600<\/code><\/li>\n<\/ul>\nTo set permissions on a single file:<\/p>\n
<\/button>Copied to clipboard<\/span><\/p>\nsudo chmod 644 \/var\/www\/html\/mysite\/index.php<\/code><\/pre>\n<\/div>\nTo fix an entire site’s files and directories at once \u2014 this is something I use regularly after restoring backups:<\/p>\n
<\/button>Copied to clipboard<\/span><\/p>\n# Set all files to 644\nfind \/var\/www\/html\/mysite -type f -exec chmod 644 {} ;\n\n# Set all directories to 755\nfind \/var\/www\/html\/mysite -type d -exec chmod 755 {} ;<\/code><\/pre>\n<\/div>\n\ud83d\udcdd Note:<\/strong> The numbers in chmod are octal. 644<\/code> means: owner gets 4+2=6 (read+write), group gets 4 (read), others get 4 (read). You don’t need to memorise the math, but knowing 7=full<\/code>, 6=read\/write<\/code>, 5=read\/execute<\/code>, 4=read only<\/code> covers 95% of cases.<\/p>\n\u26a0 Warning:<\/strong> Don’t set directories or files to 777<\/code> unless you fully understand the implications. It grants write access to every user on the server, which is a serious security risk \u2014 especially on shared hosting environments.<\/p>\nStep 4 \u2014 Verify the Fix<\/h2>\n After making changes, recheck with ls -la<\/code> and test your application. If it’s a web app, reload the page. If it’s a script, run it again.<\/p>\n<\/button>Copied to clipboard<\/span><\/p>\nls -la \/var\/www\/html\/mysite\/config.php<\/code><\/pre>\n<\/div>\nExpected output (for a file owned by www-data with 640 permissions):<\/p>\n
<\/button>Copied to clipboard<\/span><\/p>\n-rw-r----- 1 www-data www-data 512 Jan 10 09:15 config.php<\/code><\/pre>\n<\/div>\nIf you’re still seeing permission errors after fixing ownership and chmod, jump to the troubleshooting section below \u2014 there are a few less obvious causes.<\/p>\n
Common Issues & Troubleshooting<\/h2>\nStill Getting “Permission Denied” After Running chmod<\/h3>\n Cause:<\/strong> The file might be on a filesystem mounted with the noexec<\/code> or nosuid<\/code> option, or there’s an SELinux\/AppArmor policy blocking access regardless of standard Unix permissions.<\/p>\nFix:<\/strong> Check mount options with cat \/proc\/mounts<\/code>. For SELinux, check with sestatus<\/code> and look at audit logs in \/var\/log\/audit\/audit.log<\/code>. For AppArmor, check aa-status<\/code>. These security layers operate independently of standard Linux permissions \u2014 chmod alone won’t help.<\/p>\nPHP Script Returns 500 Error or “open_basedir restriction” Instead of Running<\/h3>\n Cause:<\/strong> PHP’s open_basedir<\/code> directive restricts which directories PHP can access, regardless of file system permissions. This is separate from Linux permissions entirely.<\/p>\nFix:<\/strong> Check your PHP configuration \u2014 either in php.ini<\/code>, a .htaccess<\/code> directive, or in WHM under Service Configuration > PHP Configuration Editor<\/em>. Make sure your file path falls within the allowed directories.<\/p>\n“Operation Not Permitted” When Running chown as a Non-Root User<\/h3>\n Cause:<\/strong> On Linux, only root can change a file’s owner to another user. If you’re running chown<\/code> without sudo<\/code> and you’re not root, you’ll get this error. Regular users can only change group ownership to a group they’re already a member of.<\/p>\nFix:<\/strong> Prefix with sudo<\/code>, or switch to root with sudo -i<\/code>. If you’re on shared hosting without root access, use cPanel’s File Manager \u2014 it runs permission changes as root on your behalf.<\/p>\nWordPress Can’t Write to wp-content After Uploading Files via FTP<\/h3>\n Cause:<\/strong> FTP uploads create files owned by your FTP user, not the web server user. WordPress needs write access to wp-content\/uploads<\/code> to handle media uploads.<\/p>\nFix:<\/strong> Either change ownership of wp-content<\/code> to the web server user (e.g., www-data<\/code>), or set it to 775<\/code> and add your FTP user to the web server’s group. I’d recommend the ownership approach on any server you control:<\/p>\n<\/button>Copied to clipboard<\/span><\/p>\nsudo chown -R www-data:www-data \/var\/www\/html\/wordpress\/wp-content\/\nsudo chmod -R 755 \/var\/www\/html\/wordpress\/wp-content\/\nsudo chmod -R 775 \/var\/www\/html\/wordpress\/wp-content\/uploads\/<\/code><\/pre>\n<\/div>\nPermissions Look Correct but SSH Key Login Fails with “Permission Denied”<\/h3>\n Cause:<\/strong> SSH is extremely strict about permissions on your ~\/.ssh<\/code> directory and authorized_keys<\/code> file. If these are group- or world-writable, SSH will silently reject the key \u2014 this trips up a lot of people because the permissions look fine at a glance.<\/p>\nFix:<\/strong> Set the exact permissions SSH requires:<\/p>\n<\/button>Copied to clipboard<\/span><\/p>\nchmod 700 ~\/.ssh\nchmod 600 ~\/.ssh\/authorized_keys<\/code><\/pre>\n<\/div>\nFAQ<\/h2>\n\n
Frequently Asked Questions<\/h2>\n\n
What's the difference between chmod and chown?<\/h3>\n\n
chown changes who owns a file \u2014 the user and group assigned to it. chmod changes what that owner (and everyone else) is allowed to do with the file, like read, write, or execute it. When you get a Permission Denied error, you usually need to check both: the right user needs to own the file, and the permission bits need to allow that user to access it.<\/p>\n<\/div>\n<\/div>\n
\n
Is it safe to use chmod 777 on my web files?<\/h3>\n\n
No, and I’d strongly advise against it. chmod 777 gives every user on the server full read, write, and execute access to that file. On a shared hosting environment especially, that’s a genuine security risk \u2014 other accounts could modify or read your files. Use 644 for files and 755 for directories in almost all web hosting situations.<\/p>\n<\/div>\n<\/div>\n
\n
How do I find all files with wrong permissions on my Linux server?<\/h3>\n\n
You can use the find command to locate files that don’t match expected permissions. For example, to find files that are world-writable: find \/var\/www\/html -type f -perm -o+w<\/code>. To find files that are readable by everyone but shouldn’t be (like config files), check for 644 or higher where you expected 640 or 600.<\/p>\n<\/div>\n<\/div>\n\n
Can I fix file permissions from cPanel without SSH?<\/h3>\n\n
Yes. In cPanel, go to Files > File Manager, navigate to the file or directory, right-click it, and select Change Permissions. You’ll see checkboxes for read, write, and execute for owner, group, and world. It’s less flexible than the command line but works fine for one-off fixes. For bulk changes across a whole site, SSH is much faster.<\/p>\n<\/div>\n<\/div>\n
\n
Why do my file permissions reset after I fix them?<\/h3>\n\n
This usually means something is overwriting them \u2014 a deployment script, a CMS auto-update process, or a backup restore. Check whether you have any automated processes running (cron jobs, CI\/CD pipelines, cPanel backup restores) that might be re-uploading or extracting files. Fixing the permissions in that script or process is the permanent solution, not manually resetting them each time.<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
Getting a ‘Permission Denied’ error on Linux usually means a file or directory has the wrong ownership or permissions \u2014 and it’s almost always fixable in under five minutes. This guide walks you through diagnosing and correcting Linux permissions using chmod and chown, with real hosting examples.<\/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":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"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":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[49],"tags":[585,586,588,584,590,54,587,589],"class_list":["post-216","post","type-post","status-publish","format-standard","hentry","category-linux","tag-chmod","tag-chown","tag-file-permissions","tag-linux-permissions","tag-linux-permissions-chmod-chown","tag-linux-server","tag-permission-denied","tag-vps-linux"],"yoast_head":"\n
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