could not find package manifest at /core/packages/revossl-1.0-pl2/manifest.php in MODX

Today I tried to install RevoSSL package in modx. It was downloaded successfully, but when I am trying to install it is saying
could not find package manifest at /core/packages/revossl-1.0-pl2/manifest.php.

When I see the actual package name /core/packages/ is revossl-1.0-pl. But the package is trying to find could not find revossl-1.0-pl2, so rename revossl-1.0-pl to revossl-1.0-pl2. Now the installation is smooth.

Restrict files and file types using htaccess

This is a way to restrict the web users from hacking the files. Using .htaccess we can deny the access for particular file or file types.Here is the syntax,
to restrict particular file.

<Files ~ "\file name.extension$">
Order allow,deny
Deny from all
</Files>
Eg:
<Files ~ "test.txt$">
Order allow,deny
Deny from all
</Files>
this will deny the access for test.txt file.

to restrict all the files which has specified file type

<Files ~ "\.txt$">
Order allow,deny
Deny from all
</Files>

this will deny the access for .txt file types.