windows scandisk command

Posted on August 13, 2019 by Damon Luong

chkdsk /f /r

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How to add directory browsing in apache configuration?

Posted on August 11, 2019 by Damon Luong

One of the “must do’s” on setting a secure apache web server is to disable directory browsing. 

Usually apache comes with this feature enabled but its always a good idea to get it disabled unless you really need it.

First of all find where is the main apache’s config file httpd.conf is located. 

Usually it will be located in path like this: /etc/apache/httpd.conf. 
To edit this file you will need root access to your server.

Using some file editor like Vim or Nano open this file and find the line that looks as follows:

Options Includes FollowSymLinks MultiViews

then add word Indexes and save the file. The line should look like this one:

Options Includes Indexes FollowSymLinks MultiViews

After it is done, restart apache (e.g. /etc/init.d/apache restart). 

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Stumped by (13)Permission denied: file permissions deny server access ?

Posted on August 9, 2019 by Damon Luong

I was just pretty stumped by the following Apache error, in /var/log/httpd/error_log:

[Thu Dec 08 21:53:28 2011] [error] [client 192.168.1.2] (13)Permission denied: file permissions deny server access: /var/www/html/aml/i
ndex.html

The error implies it’s a filesystem permissions issue, and the Apache site explains that it’s almost always related to filesystem permissions, not Apache configuration. But this was exasperating, because the file ownership was apache.apache, and index.html was chmod 755. Apache could absolutely access it. But then the Apache docs made a passing mention that sometimes it was related to SELinux errors.

Sure enough, that’s exactly my problem:

[matt@bos aml]$ ls -alZ 
drwxr-xr-x. apache apache unconfined_u:object_r:httpd_sys_content_t:s0 .
drwxr-xr-x. root   root   system_u:object_r:httpd_sys_content_t:s0 ..
-rw-r--r--. apache apache unconfined_u:object_r:httpd_sys_content_t:s0 .htaccess
drwxr-xr-x. apache apache unconfined_u:object_r:user_home_t:s0 images
-rw-r--r--. apache apache unconfined_u:object_r:user_home_t:s0 index.html
drwxr-xr-x. apache apache unconfined_u:object_r:user_home_t:s0 stylesheets

Note that the directory, and the .htaccess file I touched, have the httpd_sys_content label, which is appropriate here. But the other files show user_home_t. This apparently precludes Apache from being able to see them.

Where this went wrong is that, to get them onto the server, I scp’ed them from my desktop to my home directory on the webserver, and then cp’ed them to /var/www/html. In doing so, they picked up the user_home_t label since they were in my home directory.

A quick sudo restorecon -r . got everything sorted out

then restart sudo systemctl restart httpd

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check the file permission status

Posted on August 9, 2019 by Damon Luong

stat -c “%a %n” /filepath

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curl to show public ip in Linux terminal

Posted on August 9, 2019 by Damon Luong

curl ifconfig.me

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