VirtualBox command lines

To shutdown VM:
VBoxManage controlvm "vmName" savestate

serial modem locked

linux store serial port lock files in /var/lock
simply remove the LCK.. and it should unlock the modem

Error code: ssl_error_rx_record_too_long

had trouble setting up ssl on ubuntu 8.04. keep getting Error code: ssl_error_rx_record_too_long in firefox

this is how I fixed it:

create ssl certificate for apache on ubuntu 8.04 :
sudo mkdir /etc/apache2/ssl
sudo /usr/sbin/make-ssl-cert /usr/share/ssl-cert/ssleay.cnf /etc/apache2/ssl/apache.pem

cd /etc/apache2/sites-available
cp default ssl

edit ssl, add
SSLEngine On
SSLCertificateFile /etc/apache2/ssl/apache.pem

enable site,
a2ensite ssl

htpasswd syntax

add new user to subversion password file

htpasswd -m /etc/svn-auth-file sally

change application context in grails

to change the application context in a grails app,
in Config.groovy add grails.app.context=/mycontextpath

creating an iso from file on linux

I have a file that I need to convert to iso so that I can mount it cd a CDROM in QEMU. Here's how to do it:

mkisofs -o foo.iso foo.file

change postgres user password

ALTER USER postgres WITH PASSWORD '';