PHP error log => Remember log permissons

This is more for me self than anything else.

When enabling PHP error logging, for clients,  do:

Edit php.ini file (or create a new one in conf.d (/etc/php5/conf.d/php.ini)).

error_reporting = E_ALL & ~E_DEPRECATED
display_errors = Off
log_errors = On
error_log = /var/log/apache2/php-error.log


THEN !!!!!

Remember to chown 0666 the $error_log.

For on apache restart. The owner is root root, but user www-data, cant write to it.

HTH

Brent

FreeNAS KVM guest nic woes

I’m in process of testing FreeNAS on my KVM host. The problem I experienced was that FreeNAS was not picking up the Ethernet interface.

I even ran 'pciconf -vl', and lo and behold there was the nic.
I really couldn’t understand, for the below command sure works for FreeBSD 9.

This is the general  command I use for a FreeBSD guest:

virt-install --connect qemu:///system -n freebsdguestname -r 512 --vcpus=1 --disk path=/space/freebsdguest.img,size=12 -c /iso/freebsd.iso --vnc --noautoconsole --os-type unix --os-variant freebsd7 --accelerate --network=bridge:br0 --hvm;

So not to spend to much time trouble shooting, I added '--network=bridge:br0,model=rtl8139'


And it all worked.
HTH
Brent

Add additional drive or storage to a KVM guest

Ever needed to attach an additional virtual drive or storage drive to your KVM guest?

Heres how you can.

Firstly, I recommend that you backup your data!

On the KVM host, create the 'drive' with either of the following two commands

qemu-img create -f qcow2 /path/moredrivespace.img 10G
or
dd if=/dev/zero of=/path/moredrivespace2.img bs=1 seek=10G count=0

This is where it gets interesting.

Now to add your new 'drive', to your KVM guest.

Run the command 'virsh'
Welcome to virsh, the virtualization interactive terminal.
Type:  'help' for help with commands
       'quit' to quit
virsh # attach-disk KvmGuestDomainName /path/moredrivespace.img vdo

By default or by specifying the target of vdo, the default driver will be
Virtio. If you are a FreeBSD user like I am. You will struggle, for FreeBSD will not see the device. I find you need to use a SCSI device. And inorder to use / do so, you need to run this command.

attach-disk KvmGuestDomainName /space/moredrivespace.img sda

I also found for FreeBSD, its best to use the dd command. 

As per usual, Linux guests just work.
;)

And then reboot your VM.

HTH
Brent 

Exim Commands

Debug a mail delivery:

 exim -bt -d email@address.com 

Retry message delivery:

 exim -M messageID

Force delivery of all message:

 exim -qf

Force delivery of all message and delete of frozen ones:

 exim -qff

Shows log delivery for a message:

 exim -Mvl messageID

Display message body:

 exim -Mvb messageID

Display message header:

 exim -Mvh messageID

Delete a message without warning:

 exim -Mrm messageID

Count messages in queue:

 exim -bpr | grep "<" | wc -l or exim -bpc

Display all messages from queue:

 exim -bp

Count frozen messages:

 exim -bpr | grep frozen | wc -l

Delete frozen messages:

 exim -bpr | grep frozen | awk '{print $3}' | xargs exim -Mrm

P.s. You can get some more cool tips from exim cheatsheet 

Today I needed to set up connections to 2 different ports, running on a machine, sitting behind my firewall.

I knew that I needed to set up a SSH tunnel from my laptop to the server, but I certainly did not want to open 2 different shells each time I wanted to connect to the ports.

Thankfully, the ssh command allows you to specify multiple tunnels through the same server in one command. The command to do this is:

ssh -c arcfour  -C -L 8080:127.0.0.1:8080 -L 8081:127.0.0.1:8081  homedsl.org

Im amazed by how many people don’t know about runlevels, let alone, to identify what runlevel you are in.

To see what runlevel you are in.

who -r
or
/sbin/runlevel


HTH
Brent

P.s. To find out about runlevels

FreeBSD : Show when ports were installed

I just came across this.

http://lists.freebsd.org/pipermail/freebsd-chat/2006-January/003661.html

Pretty cool huh.

:)

HTH
Brent