• Don't write code until you have a good spec.
• Every piece of code should do one thing, and do it well.
• Don't optimize.
• Don't optimize until you know it's the slowest part.
• Take the time estimate, double it, and round it up to the next largest time increment.
• Ask yourself what could break on every line.
• No, it doesn't make sense, but the user will do it.
• "Garbage In / Garbage Out", just make sure you know the garbage is in the format you expect.

diff -file differences
comm -file parts in common

sendmail-path= /usr/lib/sendmail -oem -t -oi



Important apt-get commands:
apt 0.6.46 for linux i386 compiled on Sep 21 2006 10:33:09
Usage: apt-get [options] command
       apt-get [options] install|remove pkg1 [pkg2 ...]
		        apt-get [options] source pkg1 [pkg2 ...]

				  apt-get is a simple command line interface for downloading and
				  installing packages. The most frequently used commands are update
				  and install.

				  Commands:
				     update - Retrieve new lists of packages
					     upgrade - Perform an upgrade
						     install - Install new packages (pkg is libc6 not libc6.deb)
							     remove - Remove packages
								     source - Download source archives
									     build-dep - Configure build-dependencies for source packages
										     dist-upgrade - Distribution upgrade, see apt-get(8)
											     dselect-upgrade - Follow dselect selections
												     clean - Erase downloaded archive files
													     autoclean - Erase old downloaded archive files
														     check - Verify that there are no broken dependencies

															  Options:
															    -h  This help text.
																   -q  Loggable output - no progress indicator
																	  -qq No output except for errors
																	    -d  Download only - do NOT install or unpack archives
																		   -s  No-act. Perform ordering simulation
																			  -y  Assume Yes to all queries and do not prompt
																			    -f  Attempt to continue if the integrity check fails
																				   -m  Attempt to continue if archives are unlocatable
																					  -u  Show a list of upgraded packages as well
																					    -b  Build the source package after fetching it
																						   -V  Show verbose version numbers
																							  -c=? Read this configuration file
																							    -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp
																								 See the apt-get(8), sources.list(5) and apt.conf(5) manual
																								 pages for more information and options.
																								                        This APT has Super Cow Powers.




If you're trying to install Debian 4.0 in Microsoft Virtual PC 2007:
from boot of a cdrom (like netinst) use the flags: noacpi nolacpi
Set the network adapter to whichever network card you regularly have
connected to the internet (for apt-get'ing remotely). It doesn't matter how well that device is supported, virtual PC makes it look like a dec tulip adapter (even wireless devices!)


turn off BEEP in BASH shell 
In /etc/inputrc you can put the line "set bell-style none" to turn off the beeping



Taking Microsoft Vista off of a HP Pavilion dv9000 (GD545AV)  a6244n
Windows XP will run, and use all 3GB

Since drivers for XP are not "available", you have to hunt them down.

Intel PRO/100 VE Network Connection




GeForce 8300 GS


Intel E4500  	65 nm  	2MB L2  	2.2 GHz  	800 MHz




------------------------------------------------------------
Getting Postfix / IMAP Secure working with an iPhone

From Posfix and iPhones
The first order of business was to allow mail to be received on port 587, this is done by uncommenting the line starting with #submission in the postfix master.cf file. The submission port is a standard designation for port 587. If you would like to have postfix be able to receive mail on other ports, simply copy/paste that line, and change the word 'submission' to the desired port number, restart postfix, and postfix will now be listening on this new port. This may be handy for getting around certain networks that block the standard mail ports and want you to use their mail gateway. Having an alternate port you can send on may be handy to have in those rare occasions.

Also, setting up an encrypted key from Switching... Website, but it works on Debian just as well.

/etc/postfix:

openssl req -new -outform PEM -out smtpd.cert -newkey rsa:2048 -nodes -keyout smtpd.key -keyform PEM -days 365 -x509
You.ll have to add the following lines to file main.cf  in /etc/postfix:

smtpd_enforce_tls = no
smtpd_tls_loglevel = 1
smtpd_use_tls = yes
smtpd_tls_key_file = /etc/postfix/smtpd.key
smtpd_tls_cert_file = /etc/postfix/smtpd.cert

Issue the command postfix reload to refresh the configuration of your mail server and your ready to test. Start a terminal and issue the following command:

telnet yourmailserveraddress 25

The server will answer with:

Trying yourmailserveraddress...
Connected to yourmailserveraddress.
Escape character is ^]
220 yourmailserveraddress ESMTP Postfix

Then type in:

EHLO yourmailserveraddress

And again your server will answer it.s capabilities:

250-yourmailserveraddress
250-PIPELINING
250-SIZE 10240000
250-ETRN
250-STARTTLS
250 8BITMIME

Now it.s time to test TLS and enter in capitals:

STARTTLS

and the server should respond with:

220 Ready to start TLS

Then you know it will work, you could give your favourite email client a try.