• Disabling APP Notifications
• Disabling Location Services
• Disabling System Services

I found a new one this week – disconnect your AT&T MicroCell. I don’t know what the cause of this one is, but my battery drain slowed to about 25% of the rate before with the MicroCell on. I was never really happy with the MicroCell, and it literally sucks. My reception and call quality is actually better now without it.

http://wiki.apache.org/httpd/NameBasedSSLVHostsWithSNI

It turns out that there is an undocumented (or poorly documented) extension to the SSL protocol called Server Name Indication.

The solution is an extension to the SSL protocol called Server Name Indication (RFC 4366), which allows the client to include the requested hostname in the first message of its SSL handshake (connection setup). This allows the server to determine the correct named virtual host for the request and set the connection up accordingly from the start.

With SNI, you can have many virtual hosts sharing the same IP address and port, and each one can have its own unique certificate (and the rest of the configuration).

Of course there is a gotcha – your clients need to be running a modern browser (no IE6), but really who cares? This is just too awesome to pass up.

1. Insert CD/DVD source

2. Fire up a Terminal, you can then determine the device that is you CD/DVD drive using the following command:


$ drutil status
Vendor Product Rev
MATSHITA DVD-R UJ-835E GAND

Type: DVD-ROM Name: /dev/disk1
Cur Write: 8x DVD Sessions: 1
Max Write: 8x DVD Tracks: 1
Overwritable: 00:00:00 blocks: 0 / 0.00MB / 0.00MiB
Space Free: 00:00:00 blocks: 0 / 0.00MB / 0.00MiB
Space Used: 364:08:27 blocks: 1638627 / 3.36GB / 3.13GiB
Writability:
Book Type: DVD-ROM


3. Unmount the disk with the following command:


$ diskutil unmountDisk /dev/disk1
Disk /dev/disk1 unmounted


4. Create the ISO file with the dd utility (may take some time):


$ dd if=/dev/disk1 of=file.iso bs=2048


5. Test the ISO image by mounting the new file (or open with Finder):


$ hdid file.iso


6. The ISO image can then be burnt to a blank CD/DVD.

$ screen -S test

This will create the session and put you in it. Now we need to add the access control. Note: You can automate the multiuser piece by adding it to you .screenrc.

CTRL-A
:multiuser on

CTRL-A
:acladd jdoe

All jdoe has to do now is connect to the same machine and type the following command:

$ screen -x elubow/test   # $user/$session_name

There are other security combinations as the above gives jdoe full access. Here are a few common ones:

:aclchg user +rx  # Give ‘user’ read-only access
:aclchg user -x “#,at,aclchg,acladd,acldel,quit”  # Don’t allow ‘user’ any of the previous commands
:aclchg user +rwx  # Give ‘user’ read-write access (open permission on the session)

via Sharing a Screen Session | Erics Tech Blog.

remove the lock file

start mongod with --repair

after the repair is complete, then you can restart mongod

odbcinst -j
vi /etc/odbcinst.ini
vi /etc/odbc.inst
odbcinst -i -d -f /etc/odbcinst.ini
odbcinst -i -s -l -f /etc/odbc.ini
odbcinst -s -q
isql -v

Procedure – set the time zone on a per user basis

Open user ~/.bashrc or ~/.bash_profile file using vi text editor and set up TZ environment variable. Append or SET TZ as follows:

export TZ=”/usr/share/zoneinfo/{TIMEZONE-DIRECTORY}/{TIMEZONE_FILE}>”

If your username is foo and you would like to set TZ to Asia/Calcutta (INDIA IST) type command:

# vi /home/foo/.bashrc

Append following:

export TZ="/usr/share/zoneinfo/Asia/Calcutta"

Save and close the file.

(via http://www.cyberciti.biz/faq/howto-linux-set-time-zone-per-user-basis/)

How-To: Install Mac OS X – DellEFI Method

are pretty good. I followed Section 2 Part A. One thing to note, when booting the system via the “small” USB drive you will have to press “esc” and select the larger USB drive to boot from. The syslinux/isolinux on the small USB drive will continue to boot in a loop until you break the cycle. Other than that everything worked like a charm right from the start (camera, audio, wifi, etc…).

I still need to install and tweet some additional settings and my 16 GB USB drive will always be close by (6 GB installation). Additional links and information are below – enjoy.

• How To: Hackintosh a Dell Mini 9 Into the Ultimate OS X Netbook
• Virtually increase your Dell Mini Screen Resolution
• http://code.google.com/p/mydellmini/downloads/list
• http://www.eternalstorms.at/utilities/presentyourapps/index.html

First some background:

All IP addresses (IPv4 and IPv6) are allocated in large blocks to a regional registry (ARIN, RIPE, etc…) these registries then in turn allocate addresses down to ISPs, ISPs to customers and so on. By default the registry will allocate a /32 to an ISP and the ISP is supposed to allocate a /48 to a customer. The IPv6 equivalent of a IPv4 /24 subnet is a /64 which is the space a customer should break their network segments into.

This is where my brain starts to hurt.

An IPv6 /32 is 2^16 (65536) /48 subnets, which in turn are each 2^16 /64 subnets. A /64 is 2^64 addresses, the square of the size of the entire IPv4 Internet. It took me a while to find a calculator that would actually give the expanded result – 18,446,744,073,709,552,000.

The numbers are just unbelievably large. Anyways back to the problem at hand, how does an ISP properly subnet their /32 space to customers (or better put what are the breakpoints in the subnets)?
The answer is incredibly simple, since IPv6 is going to be subnetted based on the existing “:” octet separator all you need to do is increase the number and volia. Phyber’s IPv6 allocation is 2637:f238/32 which means the subnets are:


2607:f238:0000/48
2607:f238:0001/48
2607:f238:0002/48


And so on and so on. Another trick, IPv6 isn’t just 0-9, the numbering is 0-9 + a-f or:


2607:f238:0008/48
2607:f238:0009/48
2607:f238:000a/48
2607:f238:000b/48


It is a ridiculous amount of IP space. I’ll post more when I figure out what we are doing for our cross connects and loopback interfaces.

After scouring the Internet this weekend, and waiting on hold with AT&T my fears were confirmed. There is simply no way to remove the “Emergency Call” option when the phone is locked. However I did find another option which has been working just as good if not better. By holding down the mute key the phone will go into standby mode disabling all of the keys except the mute button. Unfortunately I cannot figure out how to map the side keys to the standby function, but it is a step in the right direction.