Autofs(Automounter) configuration in Linux

CATV - TV - FM Frequencies

CATV - TV - FM Frequencies

Useful for Working Out RFI

In the US, a TV channel is a 6 MHz wide chunk of bandspace. The bottom edge of the over-the-air channel 2 is 54 MHz and the upper edge is 60 MHz. Within this 6 MHz space is a video carrier, a color carrier, and an audio carrier.

QOS 802.1p on Cisco 3750 and HP Procurve Switches

Cisco 3750 QOS 802.1p testing Notes:



HP Procurve QOS configuration


Samba(smbfs) (cifs) command line mount commands in Linux CentOS


You can use the command line as :  mount -t cifs -o user=<username> //<server_ip>/<share_name>  <mount_point>


1. Basic method

Create a local mount point. For example:


mkdir /mnt/win

Edit the /etc/fstab file and add a line like:


Setting up X terminal (Xming) to CentOS 5 or CentOS 6 server

Step 1) Add line 1 line in the /etc/gdm/custom.conf file.

You must enable XDCMP in the /etc/gdm/custom.conf file add the following lines:

Enable = true

Step 2) Comment out the "no-listen=tcp" line within the /etc/X11/fs/config file.


Step 3) Restart the xfs service using the command /etc/init.d/xfs restart

Step 4) start "gdm"

Step 5) When prompted by X to allow addition X servers answer "yes"

Step 6) Configure Xming with XDCMP to IP address single window

Step 7) Check Clipboard

Udev and your Ethernet Interface names in a Virtual World

Udev and your Ethernet Interface names in a Virtual World


Have you ever cloned a VM (Virtual Machine) of either Redhat or CentOS and had your Ethernet Interface Name change on you to something other than "eth0" or "eth1" ...


If so even though you change /etc/sysconfig/network-scripts/ifcfg-ethXXXX and its entries to reflect your choice of name, after a reboot you still find your ethernet interface

libtoolT errors in autoconf(./configure) in tomcat connector source compile on CentOS 6 64bit

Normal run of libtool, produces no other warnings until the end of the 
master configure script.
At which point out pops:
  config.status: executing libtool commands
  /bin/rm: cannot remove `libtoolT': No such file or directory

This is resolved by placing:
  $RM -f "$cfgfile"

at line 680 of /usr/share/aclocal/libtool.m4


NOTE: If you already started your ./configure (autoconf) run you will need to locate the localized libtool.m4 commands in configure.status

Centralized Syslog Server Reference

Centralized Syslog Server Reference


SNPP - Simple Network Paging Protocol Resources

SMTP Gateways -

Please Note: While this protocol is popular, it was not designed for messaging and as such it is not time sensitive, there can be delays in the reciept of the email depending on the routing (this does not have anything to do with the software but the design of the protocol). If your carrier supports SNPP or WCTP we would suggest using those protocols if time is an issue!

DB2 Permissions Quick Reference

GrantPermissions by Users

The following example grants SELECT privileges on the EMPLOYEE table to the user HERON:


The following example grants SELECT privileges on the EMPLOYEE table to the group HERON:




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