Caneblu.com » Linux

Symfony: XSL module to install in Ubuntu

admin — Mon, 10 May 2010 20:22:58 +0000

Following the tutorial Simfony (known PHP Framework) to the preliminary pre-requisite, reflected the lack of XSL module under Apache and PHP. Specifically, the message I found was:

[[WARNING]] XSL module is installed: FAILED
*** Install the XSL module (recommended for Propel) ***

The workaround is to install apt-get the missing modules as follows:

sudo apt-get install libapache2-modxslt php5-xsl

then restart the instance of Apache2

sudo / etc/init.d/apache2 restart

Restarting the configuration check the error message should be gone.

MySQL backup from command line

admin — Sun, 14 Feb 2010 16:17:46 +0000

It may be useful to make a backup of a specific database through the command line. Surely it is easier to use tools like phpMyAdmin, but in case of emergency or because you prefer use the shell, this info is certainly useful. The executable that performs the operation is “mysqldump” which is usually installed with the MySQL server.

mysqldump -h localhost -u username -p database_name > database_backup.sql

Obviously the parameters changed accordingly, localhost should be fine considering the use of the shell, while database_name username must be adjusted accordingly. After the sign > is the name chosen at your discretion. Once given the command will be prompted for a password to access the database to its content.

Can also directly produce a compressed slightly by changing the syntax as follows:

mysqldump -h localhost -u username -p database_name | gzip -9 > database_backup.sql.gz

where performs gzip compression (-9 parameter indicates the best compression possible), this is useful if you download the file through the Internet.

Make a bootable USB key

admin — Wed, 11 Nov 2009 20:20:56 +0000

Today we had the need to “burn” (of course the correct term is “load”) an ISO image on a bootable USB stick. The problem was how to transfer a previously ISO image on a USB key and make it bootable. We found this very interesting project on sourceforge, named UNetbootin.

This small program in Windows version ( installation is not required) and Linux too, allow to create a bootable stick with an single easy step.

Nagios: NRPE ssl headers

admin — Wed, 18 Feb 2009 11:17:08 +0000

Just installing NRPE client for Nagios into Suse Linux Enterprise 10.
After ./configure i get this error “configure: error: Cannot find ssl headers”

You can solve installing openssl-devel with Yast or with ” yast2 -i openssl-devel”

Watch netstat -naop

admin — Sun, 04 Jan 2009 16:27:56 +0000

If you need to watch how many active network connections are running on your machine, and what processes using it, simply run from root (or under Sudo)

watch netstat -naop

where:

-n: show ip address
-a: show only active connections
-o: show the ports connected
-P: pid and name of processes