Disable emails after each cron execution

To disable sending emails to your mailbox after each cron execution, simple put an

EMAIL="" 

line right in the start of your cron file (crontab -e)

Find and clean / remove files with a specific pattern in a deep directory tree

If you need to remove all the files that comply to:
* file pattern (eg *Uploads/*.pdf)
* a size constraint (eg >= 50k)
* older than some days before today (eg 365 days older)

find . -wholename *Uploads/*.pdf -size +50k -mtime +365 -print0 | xargs -0 rm

Create a zip file per directory and delete the directories

for i in *do[ -d "$i" ] && zip -rmT "$i.zip" "$i"done

# just -r for only zip (mT is for delete)

Remove only directories in Linux

cd thedirrm -rf */

Installing VirtualBox in Linux could fail about no kernel sources available DKMS.

If this is the case then set KERN_DIR variable and then again retry installing VirtualBox

## Current running kernel on Fedora ##

KERN_DIR=/usr/src/kernels/`uname -r`

## Current running kernel on CentOS and Red Hat (RHEL) ##

KERN_DIR=/usr/src/kernels/`uname -r`-`uname -m`

## Fedora example ##

KERN_DIR=/usr/src/kernels/2.6.33.5-124.fc13.i686

## CentOS and Red Hat (RHEL) example ##

KERN_DIR=/usr/src/kernels/2.6.18-194.11.1.el5-x86_64

## Export KERN_DIR ##

export KERN_DIR

Source: http://www.if-not-true-then-false.com/2010/install-virtualbox-with-yum-on-fedora-centos-red-hat-rhel/

Find current sql sessions in MS SQL SERVER, getting also client IPs

SELECT

B.login_name,

A.client_net_address,

NoOfConnections = COUNT(*)

FROM

sys.dm_exec_connections A

INNER JOIN sys.dm_exec_sessions B ON

A.session_id = B.session_id

GROUP BY

login_name,

client_net_address

Consume WSDL / SOAP web services from node.js

There are some open source libraries that could help you call WSDL web services such as:

• https://github.com/vpulim/node-soap
• other solutions mentioned in https://nodejsmodules.org/tags/wsdl

I believe that a more flexible alternative is to:

• use a tool such as SoapUI (http://www.soapui.gr) to record input and output xml messages
• use node request (https://github.com/mikeal/request) to form input xml message to send (POST) the request to the web service (note that standard javascript templating mechanisms such as ejs (http://embeddedjs.com/) or mustache (https://github.com/janl/mustache.js) could help you here) and finally
• use an XML parser to deserialize response data to JavaScript objects

Yes, this is a rather dirty and low level approach but it should work without problems