Serial port to USB on Mac

This link provides the detailed the solution.

http://www.planet-rcs.de/article/mac_serial_port/

Note:
1. make sure you are using PL-2303 cable
2. In addition to the software mentioned in the link, you could use minicom. It has the same function in Linux.

Install Xcode on Lion 10.7

After install XCode from app store, the terminal still doesn't recognize Unix command: make, gcc.
You need go to apple development website to download "command line tools for xcode".dmg file.
and install it.

https://developer.apple.com/downloads/index.action#

comment package cannot be used by latexdiff

main.tex
\usepackage{comment}

background.tex


\begin{comment}

\end{comment}

if run command at article-latexdiff
error message:
File ended while scanning use of \next.

Need to remove

\begin{comment}

\end{comment}

e1000 network card info

http://developer.intel.com/products/ethernet/resource.htm?s1=all&s2=82541PI&s3=Datasheet#s1=Gigabit%20Ethernet&s2=all&s3=all

e1000 network card model:
82540EM
82541PI
......



Small difference between 82540EM and 82541PI




1. The default internal buffer size is different

82540EM : 16KB

82541PI: 24 KB




2. 82540EM can configure MSI control register at PCI configuration space, but 82541PI is a read only register

ethtool

// man page of ethtool
$ ethtool -h

// Check statistic registers of network card
$ ethtool -S eth0

// See most of the registers of network card in interface eth0
$ ethtool -d eth0

// See the driver information
$ ethtool -i eth0

NIC: Intel e1000

more info:
http://www.globax.info/mediawiki/index.php/Intel_Gigabit_Performance

latexdiff for Paper in PDF

1. Install the latexdiff
http://fengweizhang.blogspot.com/2010/12/subversion-latex.html

2. run: 
$ latexdiff -t CFONT --flatten ../HC-4/main.tex main.tex > doc.tex

-t CFONT: type of latexdiff
--flatten: reversal of directory
../HC-4/main.tex: old version of main.tex of paper
main.tex: new version
doc.tex: output file

3. run: 
$ pdflatex doc.tex 
if reference cannot show, change the makefile from main to doc

compile the tex file and generate the pdf file

Other option(doesn't work on my Mac):
$ latexdiff-vc -t CFONT --fatten --svn -r 7 main.tex --pdf
latexdiff-vc: combine latexdiff and version control
-t CFONT: type
--fatten: reversal of directory
--svn: version control type
-r 7: compare to old version 7
main.tex: current version
--pdf: run pdflatex to generate pdf

more info:
http://helpful.knobs-dials.com/index.php/Latexdiff
http://web.njit.edu/all_topics/Prog_Lang_Docs/pdf/latexdiff/latexdiff-man.pdf

/boot directory is full and remount another partition to /boot direcotry

Problem: /boot directory on /dev/hda1 is full, and no more space on disk
Solve: re-mount /dev/hda6 to /boot 

[root@centos5 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/hda2             9.5G  7.7G  1.4G  86% /
/dev/hda6              23G  4.7G   17G  22% /home
/dev/hda3             1.9G   37M  1.8G   3% /tmp
/dev/hda1              90M  85M   5M 100% /boot

mount /dev/hda6 /boot


[root@centos5 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/hda2             9.5G  7.7G  1.4G  86% /
/dev/hda6              23G  4.7G   17G  22% /home
/dev/hda3             1.9G   37M  1.8G   3% /tmp
/dev/hda1              23G  4.7G   17G  22% /boot
tmpfs                 251M     0  251M   0% /dev/shm
/dev/hda6              23G  4.7G   17G  22% /boot