Cleanup hardlink from a backup with hardlink (rsync like)

Posted on June 29, 2014 by dlyr

Here is a small script to remove hard link of a rsync based backup, by days.
I have use it to cleanup my backup and find when different version of file have been created.

find . -type d > dir_list0
# my dir list is of the form ./2010/07/22/home
cat dir_list0 | cut -f1-5 -d/ | grep home | sort | uniq > dir_list

# delete all hardlink, keep just the one is the oldest dir
cat dir_list | while read i;
do
find "$i" -type f -links +1 -delete
done;
#delete broken symlink
find . -type l -xtype l -delete
#delete emtpy dirs
find . -type d -empty -delete

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Keyboard shortcuts

Posted on November 14, 2013 by dlyr

MacOsX go to a hidden directory when Go menu is unavailable :
⌘+⇧+g

Ubuntu unity shortcuts reminder : hold <⌘ Win> a.k.a windows key ;)

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My one line usefull commands

Posted on October 9, 2013 by dlyr

convert png file, keeping full color (either convert will reduce color space to 1bit our colormap) if it do not loose anything
Apply convert @ -crop 600x580+100+0 -gravity Center -auto-level -define png:format=png32 output/@ to *

Copy a webpage for local viewing, recursive but not the entire www ;)

wget -r -k -Dhost.com http://www.host.com/webpage

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libGL.so compil problem

Posted on October 3, 2012 by dlyr

From time to time, on my ubuntu 11.10, i have link error like “undefined reference to glGetQueryObjectui64v”.
This is because an unidentify package update break libGL.so symlink in
/usr/lib or /usr/lib/x86_64-linux-gnu

The best solution I found is to manually
“sudo rm libGL.so libGL.so.1″
and to “ln -s nvidia-current/libGL.so .” in usr/lib
and “ln -s ../libGL.so .” in /usr/lib/x86_64-linux-gnu
and so on with libGL.so.1 if needed ..

Posted in Computer Graphics, OpenGL, Programming | Tagged , , , , , , | 1 Comment

pdf optimize

Posted on May 30, 2012 by dlyr

http://code.google.com/p/pdfsizeopt/wiki/InstallationInstructions

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Title Capitalization

Posted on March 26, 2012 by dlyr

Not to myself : how to capitalize an English paper title :
Rule 8
Always capitalize the first and last words of titles of publications regardless of their parts of speech. Capitalize other words within titles, including the short verb forms Is, Are, and Be.
Exception:
Do not capitalize little words within titles such as a, an, the, but, as, if, and, or, nor, or prepositions, regardless of their length.

Examples:
The Day of the Jackal
What Color Is Your Parachute?
A Tale of Two Cities
From :
http://www.grammarbook.com/punctuation/capital.asp
and referenced by Siggraph publications instructions

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Release and Debug with Cmake and QtCreator

Posted on March 8, 2012 by dlyr

I have used qmake for a while and the debug_and_release facilities to have both debug and release version of my code (with different executable, different build tress …)
Now I use cmake and qtcreator on a regular basis, to obtain the same behavior I have found the following approach :

in my CMakeLists.txtm something like

if(CMAKE_BUILD_TYPE STREQUAL "Debug")
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/lib-debug)
set(LIB_INSTALL_DIR ${CMAKE_SOURCE_DIR}/lib-debug)
set(EXECUTABLE_OUTPUT_PATH ${CMAKE_SOURCE_DIR}/bin-dbg)
else()
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/lib)
set(LIB_INSTALL_DIR ${CMAKE_SOURCE_DIR}/lib)
set(EXECUTABLE_OUTPUT_PATH ${CMAKE_SOURCE_DIR}/bin)
endif()
in QtCreator :
First time you open a CMakeLists.txt, simply choose a build dir (some thing like XXX/qtcreator-build) and run cmake,
then go to Tab projects->edit build configuration -> add -> clone selected
Chage build dir (something like XXX/qtcreator-build-dbg) and click “Run cmake”
In the Arguments edit line enter -DCMAKE_BUILD_TYPE=Debug
You can check that in run settings, working directory has changed to the new bin-dbg directory …

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Install (and develop in) cuda under ubuntu 11.10

Posted on February 25, 2012 by dlyr

What you need for cuda with ubuntu 11.10 :

Download and install cudatoolkit (4.1.28) and gpucomputingsdk nvidia download page
You also need last driver (either with a ppa package or direct from nvidia).

chmod +x cudatoolkit_4.1.28_linux_64_ubuntu11.04.run
./cudatoolkit_4.1.28_linux_64_ubuntu11.04.run
#-> /home/XXX/cuda for instance
chmod +x gpucomputingsdk_4.1.28_linux.run
./gpucomputingsdk_4.1.28_linux.run
#-> /home/XXX/NVIDIA_GPU_Computing_SDK
# indicate cuda install dir

I choose to install both in my home dir. Cuda need gcc 4.4 (not 4.6 which is default in ubuntu 11.10) if not installed
sudo apt-get install gcc-4.4 g++-4.4
then the simplest solution i’ve found is

ln -s /usr/bin/gcc-4.4 ~/cuda/bin/gcc
ln -s /usr/bin/g++-4.4 ~/cuda/bin/g++

Add lib and bin dir to path
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH/XXX/cuda/lib64; export PATH=$PATH:XXX/cuda/bin

cuda sdk needs also Xi Xmu and glut
sudo apt-get install libxi-dev libxmu-dev freeglut3-dev
and I don’t know why, but libcuda.so wasn’t linked from /usr/lib/nvidia-current to /usr/lib/ so you need to add the symlink
sudo ln -s nvidia-current/libcuda.so .

And to compile NVIDIA_GPU_Computing,
one need also to modify common.mk to use g++-4.4/gcc-4.4 in place of g++/gcc
in ~/NVIDIA_GPU_Computing_SDK/C/common/common.mk
~/NVIDIA_GPU_Computing_SDK/CUDALibraries/common/common_cudalib.mk common_npplib.mk
~/NVIDIA_GPU_Computing_SDK/CUDALibraries/common/UtilNPP/defines.mk
change
CXX := g++ -fPIC
CC := gcc -fPIC
LINK := g++ -fPIC
into
CXX := g++-4.4 -fPIC
CC := gcc-4.4 -fPIC
LINK := g++-4.4 -fPIC

A last thing is cuda sdk provides GL/* headers which are not compatible with some of my code, so I need to remove the directory found here ~/NVIDIA_GPU_Computing_SDK/CUDALibraries/common/inc/GL

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SIGGRAPH deadline

Posted on January 26, 2012 by dlyr

A SIGGRAPH deadline can be tough, here is my desk in “normal time” and “right after the deadline” (pass your mouse on the image).

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Install non-free latex fonts

Posted on June 6, 2011 by dlyr

sudo getnonfreefonts-sys --all
It includes luximono (and luximono.sty) for latex, a nice fixedwidth font with all typeface included (blod, italics) I use this one for listings (lstlistings, algorithmic etc …)

And now for something completly different :
Install ms font in linux :

sudo apt-get install msttcorefonts ttf-ms-fonts
sudo fc-cache -f -v

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