paste: combine files horizontally

PASTE(1)                  BSD General Commands Manual                 PASTE(1)

NAME

     paste -- merge corresponding or subsequent lines of files

SYNOPSIS

     paste [-s] [-d list] file ...

count a character in each line

for example, if I want to check if a CSV file without quotes is valid, something like the following might help:

tr -d -c ',\n' < file | awk '{print length;}' | uniq

diff two folders

http://www.techrepublic.com/blog/linux-and-open-source/how-to-compare-the-content-of-two-or-more-directories-automatically/

# diff -rq folder1 folder2 

a good website teaching you how to make an R package

howtomakeanrpackage.pbworks.com

httpry to monitor outgoing http traiffic

http://dumpsterventures.com/jason/httpry/

for example:

# httpry -i en0

aptosid nvidia driver problem with kernel 3.7.0+

http://forums.opensuse.org/english/get-technical-help-here/pre-release-beta/481597-warning-kernel-3-7-1-1-breaks-fglrx-12-6-legacy-driver.html

fix a problem with nvidia driver for kernel 3.7.0+

debian experimental repo

In particular, install a package 

apt-get update

apt-get -t experimental install packagename 

see http://wiki.debian.org/DebianExperimental

quick proxy for chrome

https://chrome.google.com/webstore/detail/quick-proxy/gchhimlnjdafdlkojbffdkogjhhkdepf

ssh -D 

proxytype: sock5

centos sudo

http://www.tuxradar.com/answers/635

/etc/sudoers 

$user ALL=(ALL) ALL 

display file with line number

http://www.commandlinefu.com/commands/view/2085/display-a-file-with-line-number

nl file > more 

or less -N,

the former is better since all are in the console windows

make automatic variables

http://www.gnu.org/software/make/manual/make.html#Automatic-Variables

linux search manual

apropos 

for example

# apropos open 

ap·ro·pos

 prep \ˌa-prə-ˈpō, ˈa-prə-ˌ\

trace files accessed

using strace on linux 

what is fs_usage on mac?

support chinese fonts on debian

http://en.wikipedia.org/wiki/Help:Multilingual_support_(East_Asian)

Simply put, two packages:

ttf-arphic-uming ttf-wqy-zenhei

xfce application shortcuts

it turns our now <Primary> is the control key. :)

and <Super> is the windows key

program library howto

http://www.dwheeler.com/program-library/

dso how to

http://www.akkadia.org/drepper/dsohowto.pdf

.a to .so

ar -x mylib.a  gcc -shared *.o -o mylib.so

LMDE 12 disable beep

and the following to /etc/modeprob.d/blacklist.conf

blacklist pcspkr

 

add the following to alsa-base.conf

options snd_hda_intel beep_mode=0

not sure which one do the trick, but who cares?

add date/time stamp to jpg

convert DSC00497.JPG -font Arial -pointsize 72 -fill white -annotate +100+100  %[exif:DateTimeOriginal] output.jpg

http://www.imagemagick.org/script/index.php