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How to Make PHP Site Faster with APC


The Alternative PHP Cache (APC) is a free open source project of PHP. It gives a very good sollution for code cache of PHP. UsingAPC will considerably boost up the speed of your PHP site. It caches immidiate opcode of PHP and also gives a user cache for storing the application data.
Below are the steps for downloading APC and installin it with PHP...
Download the APC tar ball ...
# wget http://pecl.php.net/package/APC
Unpack it into a directory..
now run the below caoomand ...
/opt/lampp/bin/phpize-x.x.x;
Here the version of phpize corresponds to the version of PHP you want to install for.

Now run the following commands 

# ./configure --enable-apc --with-apxs --with-php-config=/opt/lampp/bin/php-config-5.0.4
# make
# make install

If every thing goes well, edit your php.ini
# vi /etc/php.ini
and add the below line and save the file.

extension=apc.so
Now restart the apache server...
# service httpd restart
Now create a .php file with phpinfo() and run it in the browser. If the output shows a section for APC, the installation is successful.
Always set the APC memory very carefully in the apc config file. 

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Virus f Opyum Team

Symptoms :: 
Several processes running named f or i. 
Network choked
Apache Dead
Unknown entry  * * * * * root f Opyum Team in crontab

Investigate ::
Try to kill the f process and even root will be unable to kill it. Check file named f and i in /etc or /bin or /usr/sbin directory. Try to delete, the file f  will not delete.  Some unknown .jpg files will be there in the same folder. 

Solve :: The root is unable to delete the file f because of the immutable bit in f
To remove it use ses or chattr
Follow the below steps to remove it completely.....



remove the unknown .jpg files in system folders

#top
(kill process f) option k

#ses -i /bin/f
#rm /bin/f
#ses -i /etc/crontab
#vi /etc/crontab (and delete last line)
#reboot


Precautions ::  In my case the server was hacked bu Brute-force attack
So set a good password with a combination of upper,lower case letters and special characters.

Post your feedback or any issues you may face removing the virus.  Very less number of good threads are there explaining …