Mac for Computing

How to ssh to Mike’s machine

ssh username@mike's address

ssh with X window forwarding

• Install xquartz on both local and remote machine. (I have set up configuration and installed software on Mike’s machine)

• Edit /etc/ssh_config in your local mac, change the following

    ForwardX11 yes
  

then use ssh -Y to connect.

How to run R in the background

After you use ssh to log in Mike’s machine, type

screen

to open a session, which can run in the background. At this time you can even turn down your local laptop, and your remote session is still on.

To fetch your session, next time you log on Mike’s machine, type

screen -r

or

screen -d -r

you will get what you left last time. Type man screen for more options of screen.

After you open the screen session, you can run your R code in the background:

R CMD BATCH --no-save --no-restore infile outfile &

See this page for detail.

How to transfer file using scp

scp yourlocalfile username@mike's address:~/Documents

You can specify the remote destination folder as you want.

To get file back

scp username@mike's address:~/yourremotefile yourlocaldirectory

For directory transfer, add -r option

scp -r

How to install R package on Mike’s machine

So far, I have trouble with installing R package on Mike’s machine, but I figured out one way, which might not be the perfect, but it works.

When you log on the remote mac machine, download the desired R package from cran or transfer your downloaded R package to Mike’s machine using scp from your local machine. For example, if I want to install xtable package, I googled and found this page. Then on Mike’s machine, I type:

curl -O http://cran.r-project.org/bin/macosx/leopard/contrib/r-release/xtable_1.7-0.tgz

where the url is the MacOS X Library download address on previous webpage.

R CMD INSTALL xtable_1.7-0.tgz ~/Documents/Rpackages/

where Rpackages is the folder I make to install R packages. Now you should be able to load R package in R console (library(xtable)).

Software

• Emacs

** emacsforosx

** Aquamacs

** Emacs Mac Port: sudo port install appname

** homebrew

• homebrew/macport/flink

• R

• xquartz

• LaTeX

** Mactex

• C and Fortran

** Xcode

** gfortran

• Iterm2

• pip

    sudo easy_install pip
  

Tips

check for cpu

top -u -s5 : every 5s check cpu

check cpu usage, ordered by cpu, and list username, cpu, time, which command.

top -o cpu -stats user,cpu,time,command

Standby vs hibernate (deep sleep):

sudo pmset -a standbydelay 42000

Turn off start up sound

sudo nvram SystemAudioVolume=%00

Your .profile

Make ls colorful

alias ls='ls -G'

Make iterm tab name change automatically

export PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME%%.*}\007"'