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4.10.3. Checking the Default SELinux Context

Use the matchpathcon utility to check if files and directories have the correct SELinux context. This utility queries the system policy and then provides the default security context associated with the file path.[8] The following example demonstrates using matchpathcon to verify that files in /var/www/html/ directory are labeled correctly:
Procedure 4.16. Checking the Default SELinux Conxtext with matchpathcon
  1. As the root user, create three files (file1, file2, and file3) in the /var/www/html/ directory. These files inherit the httpd_sys_content_t type from /var/www/html/:
    ~]# touch /var/www/html/file{1,2,3}
    ~]# ls -Z /var/www/html/
    -rw-r--r--  root root unconfined_u:object_r:httpd_sys_content_t:s0 file1
    -rw-r--r--  root root unconfined_u:object_r:httpd_sys_content_t:s0 file2
    -rw-r--r--  root root unconfined_u:object_r:httpd_sys_content_t:s0 file3
    
  2. As root, change the file1 type to samba_share_t. Note that the Apache HTTP Server cannot read files or directories labeled with the samba_share_t type.
    ~]# chcon -t samba_share_t /var/www/html/file1
  3. The matchpathcon -V option compares the current SELinux context to the correct, default context in SELinux policy. Run the following command to check all files in the /var/www/html/ directory:
    ~]$ matchpathcon -V /var/www/html/*
    /var/www/html/file1 has context unconfined_u:object_r:samba_share_t:s0, should be system_u:object_r:httpd_sys_content_t:s0
    /var/www/html/file2 verified.
    /var/www/html/file3 verified.
    
The following output from the matchpathcon command explains that file1 is labeled with the samba_share_t type, but should be labeled with the httpd_sys_content_t type:
/var/www/html/file1 has context unconfined_u:object_r:samba_share_t:s0, should be system_u:object_r:httpd_sys_content_t:s0
To resolve the label problem and allow the Apache HTTP Server access to file1, as root, use the restorecon utility:
~]# restorecon -v /var/www/html/file1
restorecon reset /var/www/html/file1 context unconfined_u:object_r:samba_share_t:s0->system_u:object_r:httpd_sys_content_t:s0


[8] See the matchpathcon(8) manual page for further information about matchpathcon.