When enabling the second vhosts in Apache2 <virtualHost *:80> on a SUSE server, apache restart gave me the following error:
“_default_ VirtualHost overlap on port 80, the first has precedence”
Solution: in /etc/apache2/listen.conf add or uncomment following line:
NameVirtualHost *:80
In JQquery/Prototype: $(‘#id-of-the-element’) is same as document.geleElementById(‘id-of-the-element’)
How to use capistrano to invoke a command remotely:
cap -f deploy.rb invoke COMMAND=ls
Since Capistrano 2 it kind of required ‘Capfile’ in the folder where I run capistrano. deploy.rb can be under ‘deploy’ folder but not in the same folder as Capfile. Capfile then contains:
load ‘deploy’ if respond_to?(:namespace) # cap2 differentiator
load ‘deploy/deploy’
How to make capistrano deploy a chosen revision (thanks to Jamis Buck):
cap -S revision=1234 deploy
Capistrano on Suse SLES 10: Latest version of Ruby for SLES 10 is version 1.8.4 – from
http://demeter.uni-regensburg.de/SLES10-SDK-x86/suse/i586/ But the newest capistrano (2.4.0) doesn’t deploy correctly in ruby 1.8.4 – it deploys older revision (24) from Subversion rather the newest revision (HEAD).
To get a list of available packages of a chosen gem (package for ruby language), use:
gem list -r package-name
I had a variable and I wanted to concatenate its value with a string – in a Unix shell script (run by sh or bash). It turns out that quotation marks work well. Apostrophes don’t work all the time. An example:
echo Go “$HOME” — “$HOME”
Today I’ve set up a private and public SSH key on one server, and I copied the public key to our CVS server. However, my login names were different on those machines, and the keys didn’t help.
Then my colleague advised to create a file under ~/.ssh called config, with an entry like this:
Host happycvs.happycompany.com
User peterk
And suddenly SSH connected fine!
I’ve added a custom attribute to <TR> rows of a table and then my code searched over all rows through the values of this attribute. This is how to print all fields of an object:
var attrs= ”;
for( var attr in theObject ) {
attrs+= attr+’, ‘;
}
alert( attrs );
And to get value of a custom attribute (e.g. ‘custom_data’): row.getAttribute( ‘custom_data’ )
Yey. When I started Firefox 3rc3 today, it updated its Google Toolbar that before worked only in Firefox 2. And now it works in Firefox 3. Sweet.
When I need to configure PHP settings in .htaccess, I need ‘AllowOverride All’ line in Apache config. Then I can add something like following to .htaccess:
# 6143 is value of E_ALL
php_value error_reporting 6143
Sometimes I need to dump MySQL data from servers where I have read-only access. When I run standard mysqldump, then it fails because it tries to lock the tables. Here’s how to dump without locking:
/usr/local/mysql/bin/mysqldump -u my-user -h my-server -p -O lock-tables=FALSE db-name >db-dump.sql
