Few good links

The following are comprehensive configuration examples.

http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/prod_configuration_examples_list.html

1) You can obtain 3DES key free from:

https://www.cisco.com/pcgi-bin/Software/Crypto/crypto_main.pl?prod_refer=pix3des

2) Free Software Download Page:

http://www.cisco.com/cgi-bin/tablebuild.pl/pix

3) Good link to obtain TFTP, SYSLOG, FTP etc:

http://tftpd32.jounin.net/   (Only tftp server)

http://www.ncat.co.uk/Download/

http://www.firewall.cx/download-s01-ftp.php

4) Complete list for IANA Ports Information:

http://www.iana.org/assignments/port-numbers

5) Bandwidth Utilization:

http://www.dslreports.com/stest?loc=2

Apache benchmarking tool (ab) + CentOS

yum install apr-util
yum install yum-utils

ab -n 50 -c 10 http://www.myTestSiteAddress.com/

It will test 50 requests + maximum of 10 requests running concurrently

The -c parameter specifies the number of connections; the -k stands for HTTP Keep-Alive; and the -t parameter sets the time in seconds for which each connection is alive

ab -n 50 -kc 10 -t 60  http://www.myTestSiteAddress.com/

Run this command on the webserver to analyze the traffic as well 

tcpdump -nn 'tcp[tcpflags] == tcp-rst' and port 80 and src host x.x.x.x 

Easy Twiki backup

#!/bin/sh
cd /var/www
/etc/init.d/httpd stop
sleep 5
tar -zcf twiki.tgz twiki
mv twiki.tgz /home/public/sync/
/etc/init.d/httpd start
cd /home/public/sync
ls -la | mail -s "backup $HOSTNAME -'date'" myUser@myDomain.com

Search & Delete the logs + cron

Delete from a path
sudo find /Path-to-directory/ -name *.log  -exec rm -rf -v {} \;

Delete from the current directory
sudo find . -type f -name "*.bak" -exec rm -rf -v {} \;



By default cron jobs sends a email to the user account executing the cronjob. If this is not needed put the following command At the end of the cron job line .
>/dev/null 2>&1

To collect the cron execution execution log in a file :
30 18 * * * rm /home/someuser/tmp/* > /home/someuser/cronlogs/clean_tmp_dir.log

Delete emails from mailbox/es – Exchange 2007

First Grant all the permission to the mailboxes you are to have empty.
Get-Mailbox "target-username" | Add-MailboxPermission -AccessRights FullAccess -User "my-username"


Put the below command in the a file and save it as a .ps1 file - It will delete all the emails from a mailbox catchall without prompting

Add-PSSnapin Microsoft.Exchange.Management.PowerShell.Admin

Get-Mailbox -Identity catchall | Export-Mailbox -DeleteContent  -Confirm:$false

--------------------------------

Put the below command in a file and save it it as a  .bat file and schedule it in windows scheduler
Powershell.exe -command "& {d:\scripts\catchallMailDelete.ps1}"


------------------------------------------


Delete everything: (from all Mailboxes)
Get-Mailbox | Export-Mailbox -DeleteContent


Export everything: (and then delete the mails from the mailbox)
Get-Mailbox | Export-Mailbox -PSTfolderPath "c:\temp" -DeleteContent



Delete Emails with a given sender name:
Get-Mailbox | Export-Mailbox -SenderKeywords abc@mydomain.com -DeleteContent

Deploying with Capistrano

1. sudo gem install capistrano-ext
2. cd yours_rails_directory
3. capify .
4. mkdir config/deploy

  
Now we will create two deployments staging and production and a new staging environment.

1. touch config/deploy/staging.rb
2. touch config/deploy/production.rb
3. touch config/environments/staging.rb

1. config/deploy.rb
2. config/deploy/production.rb
3. config/deploy/staging.rb
4. config/environments/staging.rb:  
5. config/databases.yml

Now run the capistrano commands to set up the deployment. 

1. cap staging deploy:setup
   (this creates the correct directory tree)
2. cap staging deploy:check
   (this checks to make sure setup ran)
3. cap staging deploy:update
   (this updates the server with the app code)
4. ssh your_user_name@your_deployment_server
   (fill in the correct user and server here)
5. cd your_deployment_directory/current
   (again fill in the correct deploy to dir)
6. RAILS_ENV=staging sudo rake gems:install
   (this installs gems that need native compiling)
7. RAILS_ENV=staging rake db:schema:load
   (loads the database)
8. RAILS_ENV=staging rake db:seed
   (loads any seed data)
9. script/console staging
   (load the console for testing)
10. app.get('/')
    (test to see if this returns ‘200’)
11. exit
    (exit the console)
12. exit
    (exit ssh)
13. cap staging deploy:restart