Alexey Bokov's weblog » administration

MySQL create user and add table

Alexey Bokov — Mon, 11 Jul 2011 12:05:07 +0000

Short how-to:
root@215003:~# mysql -u root -p Enter password: mysql> CREATE DATABASE s_db; mysql> GRANT ALL PRIVILEGES ON s_db.* to 's_user'@'localhost' IDENTIFIED BY '12345678'; mysql> FLUSH PRIVILEGES; mysql>exit mysql -u s_user -p s_db < database.sql <code>

Where’s Sun JDK on Ubuntu 10.04 ?

Alexey Bokov — Thu, 19 Aug 2010 13:46:08 +0000

By unknown reasons Sun JDK was moved to partner repository, so to use sun jdk you need to do this steps
sudo add-apt-repository "deb http://archive.canonical.com/ lucid partner" sudo apt-get update sudo apt-get upgrade
and then enjoy :
sudo apt-cache search jdk | grep sun sun-java6-source - Sun Java(TM) Development Kit (JDK) 6 source files sun-java6-jre - Sun Java(TM) Runtime Environment (JRE) 6 (architecture independent files) sun-java6-jdk - Sun Java(TM) Development Kit (JDK) 6 sun-java6-javadb - Java(TM) DB, Sun Microsystems' distribution of Apache Derby sun-java6-demo - Sun Java(TM) Development Kit (JDK) 6 demos and examples sun-java6-bin - Sun Java(TM) Runtime Environment (JRE) 6 (architecture dependent files)

bash tips – convert to lowercase

Alexey Bokov — Wed, 11 Aug 2010 13:27:18 +0000

You can use sed :
sed -e 's/$[^\d]*$/\L\1/' in.txt > out.txt
or perl inliner :
perl -ne 'utf8::decode $_; $_ = lc $_; utf8::encode $_; print' in.txt > out.txt.
Both guys works fine for unicode file too.

How to create list of screenshots for list of urls ?

Alexey Bokov — Tue, 20 Jul 2010 13:34:24 +0000

Okay, we have text file with list of urls and want to have firefox’s screenshots from this pages and also we need to have this screenshots in some normalized resolution ( like all images should be in 300×400 – thumbnails ). First of all you need to install Command line print Firefox add-on. Then create some simple script which will run firefox with needed url, print screenshot and close ( in my case via kill – may be it’s too brutal ) firefox in cycle. It may look like this ( url_list.txt – file with urls – each url on its own line ), after running this script you will have many *.png files which is screenshots for ulrs – 0.png – for first url in urls_list.txt, 1.png for second and so on.
#!/bin/bash id=0 while read line do firefox -print $line -printmode png -printdelay 10 -printfile ${id}.png ps ax | grep firefox | awk '{ print $1 }' | xargs kill -9 ; id=$[$id+1] done < urls_list.txt

And now then we have screenshots ( all this guys are in different resolution in common ) then we need to normalize them – to create thumbnails for all images in 300×400 resolution – convert helps!
for f in *.png; do convert -thumbnail 300x400! ${f} thumb_${f} done
And we have many thumb_*.pn with 300×400 resolution all. A little note – using resolution without ! sign will work in another way – resize will be processed proportionally with using resize only for one dimension ( bigger one ).

Moving git repo from github to another location with ssh access

Alexey Bokov — Tue, 09 Feb 2010 08:49:10 +0000

We have git repo at github ( and would like to move onto some our corporate box inside our network, for example on internal.bokov.net. This repository is shared for group of developers and all who have ssh access onto internal.bokov.net shall have right to commits onto git repository. So first of all prepare place for git repo at new hosting :
ssh user@internal.bokov.net cd var mkdir git_repo chmod 777 git_repo cd git_repo mkdir my_project cd my_project git init --bare --shared=all cd objects chmod g+ws *

Next clone existing repo and change its settings to point onto internal.bokov.net
git clone --bare git@github.com:bokov/github_project.git git remote add -t master -m master origin ssh://internal.bokov.net/var/git_repo/my_project/ git push origin master

to start work with new repo just use
git clone ssh://internal.bokov.net/var/git_repo/my_project/

have fun.

Configuring Ubuntu ( 9.10 ) to work with Amazon EC2

Alexey Bokov — Wed, 11 Nov 2009 09:45:56 +0000

Short how-to about configuring Ubuntu to work with EC2 API ( for Ubuntu 10.04 users – Sun JDK was moved to partner repository so please check out Where’s sun JDK on Ubuntu 10.04 ? before follow described steps ).

1) Remove openjdk, gij
sudo apt-get remove openjdk-*;
sudo apt-get remove gij-*;

2) Install good one java powered by Sun
sudo apt-get install sun-java6-jdk

3) Install EC2 API
cd /home/abokov/

http://s3.amazonaws.com/ec2-downloads/ec2-api-tools.zip

unzip ec2-api-tools.zip

4) Configure environment : add this lines onto the end of ~/.bashrc
#ec2 deal with stuff
export JAVA_HOME=/usr/lib/jvm/java-6-sun
# setting up Amazon EC2
export EC2_HOME=/home/abokov/ec2-api-tools-1.3-30349
export PATH=$PATH:$EC2_HOME/bin:
export EC2_PRIVATE_KEY=/home/abokov/keys/pk-XXX.pem
export EC2_CERT=/home/abokov/keys/cert-XXX.pem

export EC2_ACCESS_KEY_ID=***
export EC2_SECRET_ACCESS_KEY=***

You may check out how it works using ec2-describe-instances.

Amazon Web Services links – October/November 2009

Alexey Bokov — Wed, 28 Oct 2009 11:11:26 +0000

Update in Amazon Web Services:

2 high cpu instance types : 64 bits – Double Extra Large с 34.2 GB RAM, and 13 ECU (4 virtual cores *3.25 EC2 compute Unit=ECU), 64-bit platform
and Quadruple Extra Large – 68.4 GB of RAM/ 26 ECU (8 virtual cores* 3.25 ECU) : New EC2 High-Memory Instances

Instance prices changes ( us-east is still cheaper thatn eu-west ) : Amazon EC2 – Now an Even Better Value

New service for relational DB ( provisioning, scaling and other nice things ) : Introducing Amazon RDS – The Amazon Relational Database Service

Security stuff : Vulnerability identified in Amazon’s cloud computing

Amazon EC2 – Ubuntu at google groups

5 years ago Amazon announced Amazon Simple Queue Service – top points of AWS for last 5 years

Bash’s find usefull stuff

Alexey Bokov — Tue, 20 Oct 2009 09:06:45 +0000

Recursively add files and foldes into CVS

find . -type d -print | grep -v CVS | xargs -n1 cvs add

Delete “.svn” files from current folder

find . -type f  -exec echo \"{}\" \;  | grep ".svn" | xargs rm

Cloud providers perfomance tests and monitoring

Alexey Bokov — Tue, 18 Aug 2009 13:47:10 +0000