sed: sed -n 18p filename #print line 18 from file
(see here for more)
screen: “Ctrl-s” freezes screen, and can be undone by “Ctrl-q” (see here for more)
wget:
download all pdfs on a page: wget -r -l1 --no-parent -A.pdf http://www.example.com/
download the title page index.html: wget -p -k http://www.example.com/
Email with attachment: echo “you are genius” | mutt -a genius.pdf xxx@stanford.edu
Only list directories: ls -l | egrep ‘^d’
Find R scripts containing “latex” in all (sub)directories: find . -name “*.R” -exec grep “latex” ‘{}’ \; -print
LaTex
To draw an underline: use \uline{} from ulem package instead of \underline{} to avoid excessive underline space for tall/low letters (such as “g” and “y”).
To produce horizontal lines in text: use \rule[raise-height]{width}{thickness}
To produce table with auto white column space given total width: \begin{tabular*}{0.75\textwidth}{@{\extracolsep{\fill}}lr}\end{tabular*}
Use psfrag to overlay .ps figures with latex texts - the best way to get fonts consistent with the rest of the writing and to get nice math equations. See wiki.
The easiest way (I’ve found) to draw a picture for beamer slides:
(1) Use powerpoint to make the picture
(2) Save as pdf
(3) If necessary, convert pdf to eps (not ps) format to be included in LaTeX
SSH over an http proxy:
(1) Get corksrew and compile
(2) Add the following to the ssh config file: ProxyCommand folderlocation/corkscrew http-proxy 80 %h %p
(See here for more detailed instructions)
