Monday, January 4, 2016

HOWTO Disable suhosin on a Server using php.ini or .htaccess

Disable suhosin Using php.ini file

- Login to the server and backup the php.ini file to your home directoey.
root@ximunix:~# cp /etc/php5/apache2/php.ini /home/<username>/php.ini_back_20160104

- Open the php.ini file and add the following code to the file:
; Misc Options
suhosin.simulation = On

On = Disabled
Off  = Enabled

- Save and exit the file, reload apache2 service

Disable suhosin Using .htaccess file

- Locate and open the .htaccess file of the domain in question.
- Add the following lines in the file:
php_flag suhosin.simulation On

If suphp is in activated on the server, you may also need to add this to your .htaccess.
<Files ".ht*">
deny from all
suPHP_ConfigPath /home/username

- Save and exit the file, reload apache2 service

HOWTO Redirect Error Output To a File on Linux

First of all, let's start with some Basics:

Bash / ksh and other modern shell on Linux has three file descriptors:

    stdin (0)
    stdout (1)
    stderr (2)

HOWTO redirect output (stdout) to a file:
command-name >  output.txt
command-name >  stdout.txt

HOWTO redirect all errors (stderr) to a file:
command-name 2> errors.txt
command-name 2> stderr.txt

HOWTO redirect both output (stdout) and errors (stderr) to different files:
command1 > out.txt 2> err.txt
command2 -f -z -y > out.txt 2> err.txt

HOWTO redirect both output (stdout) and errors (stderr) to the same file:
command1 > everything.txt 2>&1
command1 -arg > everything.txt 2>&1

HOWTO redirect errors (stderr) to null or zero devices:

Note: Data written to a null or zero special file is discarded by your system. This is useful to silence out errors (also know as 'error spam'):

command1 2> /dev/null
command1 2> /dev/zero
command2 -arg 2> /dev/null
command2 -arg 2> /dev/zero

Tip: Use tee command to redirect to both a file and the screen same time:

command1 |& tee log.txt
command1 -arg |& tee log.txt
command1 2>&1 | tee log.txt

Another usage:

} 2>&1 | tee foo.log


} 2>&1 | tee script.log