show apps that are using an Internet connection

Thanks to commandlinefu (http://www.commandlinefu.com/commands/view/3543/show-apps-that-use-internet-connection-at-the-moment.)

To show a list of applications using an Internet connection, use the following commands:

$ lsof -P -i -N | cut -f l -d " " | uniq | tail -n =2 (only shows name of app)
or
$ lsof -P -i -n (shows more info, cleaner look imo)
or
$ ss -p (same result, less clean)
for one line per process:
$ ss -p | cat
for established sockets only:
$ ss -p | grep STA
for just process names:
$ ss -p | cut -f2 -sd\"
or
$ss -p | grep STA | cut -f2 -d\"

How to filter messages by Subject in Postfix

In Postfix in the main.cf file there is an entry for “header_checks = regexp:/etc/postfix/header_checks”

Under /etc/postfix/ edit the header_checks file
Here is an example of a header_checkes file with a filter:
##############################################
/^Subject:.*canceled: local event error/ DISCARD
/^Subject:/ WARN
##############################################
The line /^Subject:.*canceled: local event error/ DISCARD - will deleted without notice to the sender or sending server and log the action in the log file.

The line /^Subject:/ WARN will write the Subject of each message to the log file. This is handy when trying to find a specific message.

Wine Notes / list of wines I like.

This will be an open ended entry. My hope is to keep my notes and a list of wines I really enjoyed. I have tried some other sites, but I think I would like a "1 stop shop" for all my notes, tech or otherwise. Only time will tell if this will work.

On 5/17/09
Opened a Cooper Hawk Cabernet Tannet. Was told it was a bold, heavy wine. My description is very smooth and easy to drink. I will def. buy this wine again. I was thinking about canceling my subscription, but the last 3 wines I have had, completely changed my mind. I will keep it up for a while longer and re-evaluate...

Other Cooper Hawk wine I like is Chardonnay Viognier. This was crisp and smooth. A perfect balance between sweet and dry for me. I would love this wine on a warm spring/summer day. I would def. buy this wine again.

I got some cheese from the NL farmers market and it pairs perfectly with the cabernet tannat. I will have to get the name at the next farmers market.

On 6/24/09
Its currently 95 degrees outside and I needed to cool off, so I opened a bottle of wine that has been sitting in my fridge for about 2 month. Its a Coopers Hawk Chenin Blanc. First thoughts as I poured it into a glass, super light, very clear, almost as clear as water. First thoughts on taste, very easy to drink. Might be too cold to get a good judgement. A bit dry on the back end. Short finish. Waited about 15 min and let it warm up a bit and aired it out. Not much changed on the taste. Still very good. I was planning on having some cheese and crackers with it, but now I wish I had a fresh fruit as it feels like this would be a good combination. Not sure I would buy again, only because there are other whites that I like better, but I would like a glass of this before or after a nice dinner at Coopers Hawk.

Updating time in Ubuntu

To manually update the time in ubuntu run the following command:
#sudo ntpdate ntp.ubuntu.com

This will update the time from the Ubuntu servers

Postfix enable Subject for logging

To enable logging of the "Subject:" information feature in Postfix, you need to modify the "header_checks" file in the main.cf file.

To create a file use this:
"regexp:/etc/postfix/header_checks".

main.cf entry = "header_checks = regexp:/etc/postfix/header_checks"

Once that file is created, you need to modify the file by adding:
"/^Subject:/ WARN"

This will add the Subject text to the info or mail.info log file. You can then grep based on the subject text.

SNMPwalk commands

snmpwalk -v 1|2c|3 -c public IP

example:

snmpwalk -v 2c -c public 127.0.0.1
or
snmpwalk -v 1 -c public 127.0.0.1
or
snmpwalk -v 3 -c public 127.0.0.1

Dual Monitor Config with NVidia and Ubuntu

To get dual monitors working under Ubuntu with NVidia drivers make the following changes to your xorg.conf file

Under the heading of "Screen" add the following:
Option "TwinView"
Option "1280X1024 280X1024"

Save this and restart X.

You will not have 2 monitors.

http://www.ubuntugeek.com/dual-monitors-with-nvidia.html

Sample xorg.conf after change:

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
DefaultDepth 24
Option "TwinView"
Option "1280X1024 1280X1024"
EndSection