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G73 keyboard backlight scripts

Ktoso — Sat, 29 Jan 2011 19:09:42 +0000

I’ve upgraded my desktop and laptop last week. By “and” I mean that I’ve bought an desktop replacement class notebook – an Asus G73 series. Amongst many nice parts it has I’m very happy about the harddrives – Seagate Momentus XT, click the link to see an very interesting benchmark of it. Anyways, that’s not what this post should be about.

The G73 has an backlit keyboard, which may come in handy while late night coding without lights on as I like to code sometimes. (I’m using a X6 Sidewinder, even with this Notebook so it’s not like it’s keyboard matters to me most of the time ;-)) As usual with such “super cool addons” the funtion keys regulating the keyboard backlight seemed to only work on Windows – which I’m only using for gaming (but rarely) and testing if the software I happened to write runs ok on it. Anyways, turns out that the keyboard does really well integrate with linux, and you just need a few simple commands to use it, I’ve made them available on github :-)

https://github.com/ktoso/g73-keyboard-backlight-sh <- Go here to check it out :-)

Asus G73 Keyboard Backlight GNU/Linux Scripts

=============================================
To enable the `Fn + F3` and `Fn + F4` shortcuts to work under linux and really
manipulate the backlight brighntess on your *Asus G73* series notebook, follow theese simple steps:
1. Clone this repository to your home directory (or wherever you want to, I'll do this example for ~/ for simplicity)
cd
git clone git://github.com/ktoso/g73-keyboard-backlight-sh.git g73
2. Make sure all scripts are marked executable:
cd g73
chmod +x *.sh
3. Take a look at these scripts to make sure you trust them, why? Because they'll need root access,
without asking for the password. Now we'll add these scripts to allow `sudo`to run them without
asking for any password:
su -c 'visudo' # or 'sudo visudo' if you're a sudoer (on ubuntu etc)
There just add the following lines at the end of this file (or similar, with the script names etc).
Of course, replace `ktoso` and `/home/ktoso/` with your *username* and *your home directory*.
## allow running keyboard backlight scripts
ktoso ALL=(ALL) NOPASSWD:/home/ktoso/g73/*
4. Now all that's left is to setup the key bindings for the scripts. If you're on KDE4, just go to
*System Settings -> Shortcuts and Gestures -> Custom Shortcuts* and *edit -> import…* the file **~/g73/g73_keyboard.khotkeys**
which contains ready keybindings for these scripts.
Now you may use `Fn + F3` to make the keyboard backlight shine **less**, and the `Fn + F4` combination to make it shine **more**.

[Terminal Heroes] sed mastery – group catching

Ktoso — Sat, 09 Oct 2010 19:24:36 +0000

Just a quick sed (the stream editor) example, as someone from work needed it a few minutes ago and I was more happy to supply an quick solution:

# replace the href part

[ktoso@homunculus ~]$ cat sedmastery
<a href="#" id="hibernate">Hibernatea>
<a href="#" id="html">HTMLa>
<a href="#" id="js">JavaScripta>
[ktoso@homunculus ~]$ sed 's|$[^#]*$#$[^>]*$>$[^< ]*$|\1/\3\2>\3|g' sedmastery
<a href="/Hibernate" id="hibernate">Hibernatea>
<a href="/HTML" id="html">HTMLa>
<a href="/JavaScript" id="js">JavaScripta>

Yup, that’s basically it. You may also apply this directly in vim as I’ve showed here a few years ago and you’ll probably need to look some stuff up here or on this awesome sed guide.

Installing Git with Gitosis

Ktoso — Sun, 07 Mar 2010 15:22:40 +0000

Git is really simple and VERY powerfull. It makes svn look like an idiot – but that’s just my personal opinion ;-)

Anyways, I’m using github most of the time, but now I’d like to hava a non public repository (yet remote) for some small project. I’ve been commiting to a local git instance from the begining of this project so just pushing it into a new repo will be really simple.

I wanted to have som easy to administer localozed git to serve hit hosting for my friends etc. So this is how I did it:

On server:

# do this as root of course

cd ~/src
git clone git://eagain.net/gitosis.git
cd gitosis
./setup.py install
useradd git
#end of obvious stuff
gitosis-init < /location/of/administrators/public/id_rsa.pub #this will allow you to administer gitosis remotely
sudo chmod 755 /home/git/repositories/gitosis-admin.git/hooks/post-update # in case gitosis-init didn't do this already

Now we can do all the administration without being logged in into our server – just by using git!

#all of the following is done LOCALLY!

git clone git@stratos:gitosis-admin.git
cd gitosis-admin
vim gitosis.conf #edit groups and repositories
writable = bla is responsible for the repositories
#for example you could setup:
#then just do the stuff you would normally do with git:
#[group secret-group]
#writable = bla
#members = ktoso@homunculus ktoso@protos
#here's how your dir structure should look like
#├── gitosis.conf #repository configuration
#└── keydir #put all (ssh) public keys of your users in here
# ├── ktoso@homunculus.pub
# └── ktoso@protos.pub
#now just do what you would normally do with a git repository
git add .
git commit -m 'new repo: bla'
git push

You can then just pull/clone this repo:

git clone git://stratos/bla.git

Yeah, this post isn't much of an discovery - yet I wanted to show you how SIMPLE and SCALABLE a simple git repository can be. For mor information about git and gitosis see: a simple google search

Terminal Heroes 8: Memory usage scripts

Ktoso — Wed, 24 Feb 2010 10:54:21 +0000

I have a low-memory VPS running online and thus always have to worry about what uses how much memory… Of course top and my favorite htop are very good tools to check this, but sometimes I just want to get a super simple report if I’m overusing memory or not yet. The bellow scripts (most of them was found online or hacked up from multiple scripts to fit my needs) print simple yet very readable memory usage information.

memused

#!/bin/bash

#if [ $1 = '']; then
# ps auxf | awk '{sum=sum+$6}; END {print sum/1024}';
#else
# ps auxf | grep $1 | awk '{sum=sum+$6}; END {print sum/1024}';
#fi
bean=`cat /proc/user_beancounters` guar=`echo "$bean" | grep vmguar | awk '{ print $4;}'` burst=`echo "$bean" | grep privvm | awk '{ print $5;}'` priv=`echo "$bean" | grep privvm | awk '{ print $2;}'`
let total=guar/256 let used=priv/256 let burst=burst/256
echo "VPS memory usage:"
echo "Used: $used MB"
echo "Total: $total MB"
echo "Burstable to: $burst MB"

Sample output:
VPS memory usage: Used: 296 MB Total: 256 MB Burstable to: 512 MB

memfree

#!/bin/bash

#
# Revised 02-Feb-2007: include kernel memory (kmemsize) in 'used' calculation
# and show percentages in output.
#
BEAN=`cat /proc/user_beancounters`
GUAR=`echo "$BEAN" | grep vmguar | awk '{ print $4;}'`
PRIV=`echo "$BEAN" | grep privvm | awk '{ print $2;}'`
KMEM=`echo "$BEAN" | grep kmem | awk '{ print $3;}'`
let TOTL=$GUAR/256
let KMMB=$KMEM/1048576
let PVMB=$PRIV/256
let USED=$KMMB+$PVMB
let FREE=$TOTL-$USED
if [ "$FREE" -gt "0" ]; then
let UPER=$USED*100/$TOTL
let FPER=100-$UPER
else
let UPER="100"
let FPER="0"
fi
echo "VPS Memory:"
echo " Total: $TOTL mb Used: $USED mb (${UPER}%) Free: $FREE mb (${FPER}%)"

Sample output:
VPS Memory: Total: 256 mb Used: 302 mb (100%) Free: -46 mb (0%)

memheld

#!/bin/bash

grep oomguarpages /proc/user_beancounters | awk '{s=$2;t=$3;u=$4; {print "VPS Memory Usage\nCurrent Held: " s/256 "MB\nMax Held: " t/256 "MB\nBarrier: "u/256"MB" }}'

Sample output:
VPS Memory Usage Current Held: 160.832MB Max Held: 294.605MB Barrier: 256MB

memps

#!/bin/bash

echo "ps axo pmem,pcpu,comm | sort"
ps axo pmem,pcpu,comm | sort

Sample output:
ps axo pmem,pcpu,comm | sort 0.0 0.0 script 0.0 0.0 script 0.1 0.0 init #... 2.2 0.0 httpd 4.0 0.0 mysqld 7.3 0.0 httpd 8.0 0.0 httpd %MEM %CPU COMMAND

memprivmpages

#!/bin/bash

beans=`cat /proc/user_beancounters | grep priv`
max=`echo $beans | awk '{ print $4;}'`
use=`echo $beans | awk '{ print $2;}'`
let "per=$use*100/$max"
let "mb=$use/256"
let "mmb=$max/256"
echo "privvmpages usage: $mb MB ($per% of $mmb)"

Sample output:
privvmpages usage: 296 MB (57% of 512)
For those wondering, yes I do have memory usage above “100%” in the output of some of these scripts, and it’s partially true. A VPS does usually have some guaranteed memory, and some “burstable” – so you can use more than just the guaranteed memory for some period of time. On the mashine I ran this I have 256 guaranteed and a “total” of 512MB – including the burstable memory.

If you like any of these, feel free to use them. I use them by creating a scripts directory and adding it to the PATH, so I can simply invoke them from anywhere.

PS: For more detailed memory usage information (as graphs etc), I’m using Munin and really recommend it. The graphs it draws are really nice, and it doesn’t inflict heavy load on the server, and it can monitor remote hosts if needed!

Kill only Tomcat

Ktoso — Sun, 21 Feb 2010 22:14:47 +0000

There is sometimes the need to kill some JVM, I usually use “killall java” and that works fine as long as that’s in fact what I want – kill ALL. But let’s say i just want to kill Tomcat and not my IDE? The below method works quite well in such an situation:

[ktoso@homunculus ~]$ sudo netstat -lpn | grep 8080

tcp 0 0 :::8080 :::* LISTEN 18525/java
[ktoso@homunculus ~]$ kill 18525 # you might need to add -9 here (SIGKILL)

A quickly hacked up version of an simple shell script to kill this tomcat could look like (I still suck at awk…):

#!/bin/sh

kill -9 `netstat -lpn | grep 8080 | awk '{print $7}' | awk -F/ '{print $1}'`

The above obviously sux, as we’re using two awk commands after another… Ans also in the above examples, I’ve assumed that tomcat is listening on 8080, this may not always be the case, since with mod_proxy_ajp, there is no need fot it to listen on it’s default port and just the one to communicate by AJP. Let’s use it’s name to find it’s PID, we’ll use ps and grep and awk – life is simple with them. :-)
Here’s the final version of this command:

#!/bin/sh

kill -9 `ps aux | grep catalina | awk '{print $2}'`

MySQLIntegra: dbfiller & wiki

Ktoso — Tue, 09 Feb 2010 23:06:21 +0000

I passed all my exams at my first attempt and should have now some time to relax, right? Well something like that, I’m actually doing quite a lot these days. We’re on the roll with MySQL Integra.

Our server “Kopiec” is somewhat online (running CentOS off course) – we’re able to start/stop if thanks to a tool that’s called “remote insight”, and I’ve put 3 databases on there. MariaDB, InfiniDB and a clean MySQL instalation. We’re somewhat having problems with TokuDB, but that’s going to be our 4th database of interest. If you want to keep track of our test’s you can take a look at: http://mysqlintegra.project13.pl/.

The first step in getting things tested is filling those db’s with some data, and I mean a LOT of data. So we hacked up a more or less quick and dirty python script called dbfiller (source code avaiable on github) that would simulate a very simple table generation scheme (people working on shifts and checking in when they’re finished or start some activity). If you’re interested, our task is specyfied in the /doc/Opis.pdf file (sorry, only in polish). After a few days it’s up and running and we’re moving on to filling up those databases with some gigabytes of data.

Next we’re going to write some SQL Views/Procedures and then we’ll use Apache JMeter to run some performance benchmarks of some interesting data storage engines.

PS: If you’re wondering about my GWT-Crossword project – yeah, it’s still actual, and I’ll get right on it when done with some of the stuff here.
PPS: Yes, an Linux powered phone AT LAST in my hands! The HTC HERO is comming to me really soon – never again shall I use a ShitOS like WindowsMobile 6.5.

(Almost) Automatically convert files into PDF

Ktoso — Mon, 16 Nov 2009 00:56:55 +0000

I’m learning Numerical Analysis right now and a friend of mine found some really nice PS files by dr Marian Bubek ( http://www.icsr.agh.edu.pl/~mownit/mownit.html ). I was really happy to see some *.ps but some people from my fellow students started complaining that they’d rather have pdf’s and not ghostscript files (who knows why they’d do..?). Anyways, they all had “manual” repetitious methods for converting the files – even uploading to somewebsite to have them converted over there “in the cloud”… I though of a slightly quicker and more efficient way, here it is, hope you’ll like it. Ah, there is One “non standard” requirement for this to work, you have to install cups-pdf :-)

wget http://www.icsr.agh.edu.pl/~mownit/mownit.html -r –level 1 -A.ps –cut-dirs 4

mv www.icsr.agh.edu.pl/* .
rm -rf www.icsr.agh.edu.pl/
for file in `dir -f *` ; do
lpr -P 'cups-PDF' $file;
echo "press enter when cups is done printing…" #yeah, i got lazy here, one could watch lpq for changes etc.
read oczekiwanie;
mv /home/ktoso/Pulpit/cups-pdf/template.pdf ./$file;
done;
# ________________
#< Happy hacking! >
# —————-
# \ ^__^
# \ (oo)\_______
# (__)\ )\/\
# ||—-w |
# || ||

Fixing Blender problems on IntelGMAX4500

Ktoso — Wed, 21 Oct 2009 19:30:07 +0000

I’ve recently bought a new laptop, a 15.6” HP Probook, that replaced my netbook Asus EEE 900 (needed some bigger hardware to work on “on the move”). One problem I encountered was blender not displaying correctly if I’d expand any dropdown menu etc. The fix is very simple yet powerfull, just set the following:

LIBGL_ALWAYS_SOFTWARE=1 blender

This will launch blender and render it’s interface in software mode – runs perfectly, and no slowdowns could be detected by me so far :-)

Vim Hacking – 1 – vis

Ktoso — Sun, 20 Sep 2009 18:33:42 +0000

Vim is a really amazing text editor (though I’d like to learn Emacs too soon… :-)) and it can be easily expanded to be even more useful. One super cool extension I found is: vis -- it allows powerful sed-like line modification (you could use sed from inside vim, but that’s not really “handy”). Vis is a vim plugin, and as such, it has to be installed before use, here is how to do this (asuming you have vim 7.0+):
echo 'read some about the plugin at: http://vim.sourceforge.net/scripts/script.php?script_id=1195' vim /home/script/location/vis.vba :source %
With this done you can doo stuff like in this video i did:

Watch it on youtube to see useful annotations! If your still new to vim you might want to start with simple editing as shown here: http://www.youtube.com/watch?v=71YTkxUNwmg&NR=1

Terminal Heroes – 6 – Track X events

Ktoso — Sat, 19 Sep 2009 22:53:33 +0000

Another Command Line Fu oneliner I’ve sumbited today:

#show X window events in chosen window

$ xev -id `xwininfo | grep 'Window id' | awk '{print $4}'`
EnterNotify event, serial 13, synthetic NO, window 0×6400053,
root 0x13c, subw 0x640005b, time 42431610, (367,0), root:(369,63),
mode NotifyNormal, detail NotifyVirtual, same_screen YES,
focus NO, state 16
MotionNotify event, serial 13, synthetic NO, window 0×6400053,
root 0x13c, subw 0x640005b, time 42431610, (367,0), root:(369,63),
state 0×10, is_hint 0, same_screen YES
MotionNotify event, serial 13, synthetic NO, window 0×6400053,
root 0x13c, subw 0x640005b, time 42431618, (366,0), root:(368,63),
state 0×10, is_hint 0, same_screen YES

After executing this, click on a window you want to track X Window events in. You could “read” this command like this: “xev will track events in the window with the following -id, which we get by greping window information obtained by xwininfo” :-)

Ok, but why did I need such weird information? Well, I wanted to make a simple video showing vis, a vim plugin etc. But as it is always in vim, keypresses are essential – so I wanted to “show what i type” bigger :-) I’ll post it really soon btw… :-)

The command was posted on commandlinefu