Develobert Webmasters' Blog

Suppose you have an existing PHP site that depends on the configuration value of magic_quotes_gpc being either on or off. Now imagine that you have a small script you want to add to the site that requires magic_quotes_gpc to be the opposite value.

How can you have magic_quotes_gpc be on and off at the same time ?

You could chalk it up to bad programming and not use the script. But what if it's a good script and the programmer has taken all proper precautions for whichever way they decided to use the magic_quotes_gpc ?

You could place the script in a subdirectory and set magic_quotes_gpc the way you need it for that script within that subdirectories htaccess using php_flag directives. But what if having the script in a subdirectory will end up complicating things in the scripts template or other areas ?

That's where Apaches <Files/> container comes in. You can use this container inside htaccess or the <VirtualHost/> container of the site to apply php_flag directives only to specific files as shown below.

<Files "my-script.php">
 php_flag magic_quotes_gpc off
</Files>

Posted by Joe
at 5:17 PM
1 responses

Labeled/Tagged as: apache htaccess php programming scripting server

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I've got a small network of Ubuntu computers at home and only one has a monitor. The rest I manage with SSH, FTP, and XDMCP logins.

Entering my password every time I want to get a terminal for one of the remote systems isn't very fun because my passwords are upwards of 16 characters. So I needed a way to login with SSH without needing to type a password.

On my main system, the one with the monitor, I used ssh-keygen at the terminal to generate a pair of public and private keys. By default ssh-keygen wants to create key files named id_rsa and id_rsa.pub but I decided to use home-network for my key files instead so I know what these ones are for.

I also just pressed enter for the passwords to leave them blank.

user@main-computer:~/Desktop$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/user/.ssh/id_rsa): /home/user/.ssh/home-network
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/user/.ssh/home-network.
Your public key has been saved in /home/user/.ssh/home-network.pub.
The key fingerprint is:
00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00 user@main-computer
The key's randomart image is:
+--[ RSA 2048]----+
|                 |
+-----------------+
user@main-computer:~/Desktop$

Once that was done I opened my FTP application and navigated the local and remote file lists to the following directory.

/home/user/.ssh/

I uploaded home-network.pub to the remote system and renamed it to authorized_keys so that on the remote system I had the following.

/home/user/.ssh/authorized_keys

If that file already existed on the remote system, I would have opened both files in my text editor and copied the contents of the *.pub file into that authorized_keys file.

Once everything was saved and uploaded I fired up SSH to login to the remote system and was logged in without needing to enter my password.

Posted by Joe
at 8:48 PM
0 responses

Labeled/Tagged as: automation Command Line linux network ssh Ubuntu

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