"screen" command

- list all screens: CTRL A "
- create one screen: CTRL A c
- close one screen: CTRL D
- help: CTRL A ?
- escape: space
- leave the screen session: CTRL A d
- rename session: (C-a :) and then enter the command sessionname SESSIONNAME
-rename window: (C-a A)

-renumber window: (C-a :) and then "number XXX" (warning: not bigger than the existing max)

- re-attach a "Detached" screen session

joe@devxml1:~$ screen -ls
There is a screen on:
9425.pts-8.devxml1 (09/09/2012 16:21:38) (Detached)
1 Socket in /var/run/screen/S-lefl.

joe@devxml1:~$ screen -r 9425.pts-8.devxml1
[detached from 9425.pts-8.devxml1]

- re-attach an "Attached"
. - if the screen is attached: screen -D -r

boost and cpp-netlib

-- Boost --
./bootstrap.sh --prefix=/home/lll/tmp/tmp-cpp-netlib/boost_1_49_0/
./b2 --layout=tagged install

(need layout to generate multithread boost libs)

-- cpp-netlib --
cmake -DBOOST_ROOT=/home/lll/tmp/tmp-cpp-netlib/boost_1_49_0/ -DCMAKE_BUILD_TYPE=Debug -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ .
make

Scalability concepts

Google BigTable
http://labs.google.com/papers/bigtable.html

BigData : are datasets that grow so large that they become awkward to work with
http://en.wikipedia.org/wiki/Big_data

Hadoop

MapReduce : Google framework

Dynamo: Amazon's Highly Available Key-value Store
http://www.allthingsdistributed.com/files/amazon-dynamo-sosp2007.pdf

- Master / slave
- peer to peer
- cluster: similar components
- grid: different components

aptitude search result

p, meaning that no trace of the package exists on the system,
c, meaning that the package was deleted but its configuration files remain on the system,
i, meaning that the package is installed,
v, meaning that the package is virtual.

The second character indicates the stored action (if any; otherwise a blank space is displayed) to be performed on the package
i, meaning that the package will be installed,
d, meaning that the package will be deleted,
p, meaning that the package and its configuration files will be removed.

If the third character is A, the package was automatically installed

JNI

I had to do:

cd /usr/lib
ln -s /usr/local/jdk1.6.0_22/jre/lib/amd64/libjava.so .

to use -ljava

See also   swig

SEO

SEO: Search Engine Optimization
SMO: Social Media Optimization: Methodization of social media activity with the intent of attracting unique visitors to website content (Facebook button "I like")
SEM: Search Engine Marketting: through the use of, paid placement, contextual advertising, and paid inclusion

gnuplot

run gnuplot:

gnuplot> set timefmt "%H:%M:%S"
gnuplot> set xdata time
gnuplot> set logscale y
gnuplot> plot "day_poll.txt" using 2:1 title ' my title '

gnuplot> plot "<awk '{i=i+$2; print $1,i}' clicks_.txt" title ' clicks'
gnuplot> plot "<awk '{i=i+$2; print $1,i}' out-log-final.txt" title "LG", "<awk '{i=i+$2; print $1,i}' clicks_.txt" title "ozen"
.