Technology Blog

Using WGET to download a website including css/js/images

by on Sep.27, 2012, under Uncategorized


wget -e robots=off -p -k


-e robots=off – wget ignores robots.txt which may tell spiders to not download files

-p  – get all assetts (css/images/js)

-k – convert links to relative not absolute

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Shell Script to Optimize all tables for a database

by on Feb.16, 2012, under Linux, MySQL

This shell script finds all the tables for a database and run a command against it.


See File optimize-tables

The file’s contents are below as well:


# this shell script finds all the tables for a database and run a command against it
# @usage " --optimize MyDatabaseABC"
# @date 6/14/2006
# @version 1.1 - 1/28/2007 - add repair
# @version 1.0 - 6/14/2006 - first release
# @author Son Nguyen


printUsage() {
  echo "Usage: $0"
  echo " --optimize <dbname>"
  echo " --repair <dbname>"

doAllTables() {
  # get the table names
  TABLENAMES=`mysql -D $DBNAME -e "SHOW TABLES\G;"|grep 'Tables_in_'|sed -n 's/.*Tables_in_.*: \([_0-9A-Za-z]*\).*/\1/p'`

  # loop through the tables and optimize them

if [ $# -eq 0 ] ; then
  exit 1

case $1 in
  --optimize) DBCMD=OPTIMIZE; doAllTables;;
  --repair) DBCMD=REPAIR; doAllTables;;
  --help) printUsage; exit 1;;
  *) printUsage; exit 1;;

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Convert any dedicated machine into a xen hypervisor

by on Feb.16, 2012, under Linux


Important Note:

Since these were Rackspace servers – the default repository that they connect to does not have the xen kernel packages and xen software on them.  We had to call and have Rackspace add the capability of using certain commands like “yum install xen”

Step 1.1:Install the xen kernel and xen.


# yum --disableexcludes=all install kernel-xen xen


Step 1.2: Reboot


# reboot



Step 1.3:Ensure the new kernel loaded.  You should see xen after the kernel version:


# uname –a


Linux 2.6.18-238.9.1.el5xen #1 SMP Fri Mar 18 12:53:42 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux



Step 1.4:Ensure xen is running on boot.


# xm list

Name                                      ID Mem(MiB) VCPUs State   Time(s)

Domain-0                                   0     7989     8 r-----   6268.9


Congrats the host machine is setup!

Step 2: Let’s setup a CentOS virtual machine.  Virt-install:


# virt-install -–prompt


What is the name of your virtual machine? mnode1

How much RAM should be allocated (in megabytes)? 8024

What would you like to use as the disk (file path)? /home/xen/mnode1

How large would you like the disk (/home/xen/mnode1) to be (in gigabytes)? 100

What is the install URL?


<code>Starting install...</code>

Retrieving file .treeinfo...                             |  417 B     00:00

Retrieving file vmlinuz...                               | 2.1 MB     00:01

Retrieving file initrd.img...                            | 7.9 MB     00:03

Creating storage file...                                 | 100 GB     00:00

Creating domain...                                       |    0 B     00:05

error: Failed to get local hostname

Domain installation still in progress. You can reconnect to

the console to complete the installation process.


Step 4:At this point you need to connect to the virtual machines “console” to continue.

# xm console <hostname>

Step 5:Go through the centos install…..I’ll omit this process.  But in short you WILL need to know the ip address, subnet, and gateway of your server.



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Install APF Firewall

by on Feb.16, 2012, under Linux, Security

Install iptables (Hopefully, you’ve done this already)

# yum install iptables* -y

Download, unpack, install of APF from source:


# cd /usr/local/src

# wget

# tar -zxf apf-current.tar.gz

# cd apf-9*

# ./


Cleanup source install files:

# rm -Rf /usr/local/src/apf-9* && cd


Backup original APF config:

# cp /etc/apf/conf.apf /etc/apf/conf.apf.bak


Edit APF Configuration file:

# nano -w /etc/apf/conf.apf


Change the following settings:

RAB="0" to RAB="1"


TCR_PASS=”1″ to TCR_PASS=”0″












Step 20: Reload APF:

# /usr/local/sbin/apf–r

Step 21:Make sure APF starts automatically after reboot:

# chkconfig --add apf

# chkconfig –level 345 apf on

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Twitter Updates for 2011-11-19

by on Nov.19, 2011, under Uncategorized

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Twitter Updates for 2011-10-13

by on Oct.13, 2011, under Uncategorized

  • @LiquidWeb its the host that's been down for 7 hours now: dc2-vps1-245 #
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Twitter Updates for 2011-10-12

by on Oct.12, 2011, under Uncategorized

  • @liquidweb Not experiencing the Heroic Support today…down since 6:30am EST and no one can give me an ETA or description of whats going on. #
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Twitter Updates for 2011-09-28

by on Sep.28, 2011, under Uncategorized

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Twitter Updates for 2011-09-12

by on Sep.12, 2011, under Uncategorized

  • @AKlaassen Only approved people can view tweets…saw yours and gils #
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Twitter Updates for 2011-09-02

by on Sep.02, 2011, under Uncategorized

  • Creating Digital Facebook page is in full effect! Please like us! #
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