Creating GIT projects based on SVN dumps

Following script will create new GIT projects based on SVN dump files.
As prerequisite you must have setup Gerrit codereview system. You need to allow the Gerrit user to directly push to master branch, otherwise all SVN commits need to be reviewed/verified, and for existing project this could means hundreds of commits.

Script:

#!/bin/bash
#!/bin/bash
GERRIT_IP=10.1.1.1
GERRIT_USER=xxx
GERRIT_PORT=29418

if [ -z "$1" ]; then
echo "Provide SVN dump file as first argument"
exit -1
fi

if [ ! -f $1 ]; then
echo "SVN dump $1 doesn't exists"
exit -1
fi

if [ -z "$2" ]; then
echo "Provide project name (that will be created in GIT) as second argument"
exit -2
fi

if [ -e $2 ]; then
echo "File or directory with name $2 already exists"
exit -2
fi


CURR_DIR=`pwd`

rm -Rf svnrepo
svnadmin create svnrepo/

svnadmin load svnrepo/ < $1
git svn clone file://$CURR_DIR/svnrepo/ $2
ssh -p $GERRIT_PORT -l $GERRIT_USER $GERRIT_IP gerrit create-project --name $2

# add origin
echo -e "[remote \"origin\"]" >> $2/.git/config
echo -e "\tfetch = +refs/heads/*:refs/remotes/origin/*" >> $2/.git/config
echo -e "\turl = ssh://$GERRIT_USER@$GERRIT_IP:$GERRIT_PORT/$2" >> $2/.git/config
echo -e "\tpush = HEAD:refs/for/master" >> $2/.git/config

# add originmaster
echo -e "[remote \"originmaster\"]" >> $2/.git/config
echo -e "\tfetch = +refs/heads/*:refs/remotes/origin/*" >> $2/.git/config
echo -e "\turl = ssh://$GERRIT_USER@$GERRIT_IP:$GERRIT_PORT/$2" >> $2/.git/config
echo -e "\tpush = HEAD:refs/heads/master" >> $2/.git/config

# add master branch config
echo -e "[branch \"master\"]" >> $2/.git/config
echo -e "\tremote = originmaster" >> $2/.git/config
echo -e "\tmerge = refs/heads/master" >> $2/.git/config


cd $2
git push originmaster
cd ..

In nutshell The script creates a dummy SVN repository, then use git-svn command to create local git project, creates a new project in Gerrit, adds Gerrit as remote repository to the local GIT configuration and finally pushes the changes to Gerrit

In order to use the script you need to provide a SVN dump file as first argument, and GIT project name as second argument

Install Gerrit

1) Install tomcat.

2) Download/build gerrit.war to tomcat websapps directory

3) Create gerrit directory

mkdir /usr/share/gerrit

4) Initialize gerrit configurations

java -jar gerrit.war init -d /usr/share/gerrit

- Choose default values for all configuration except
- Choose authentication method HTTP
- Enter tomcat as "run-as user"
- Choose to Update/copy gerrit.war
- Choose to use Bouncy Castle

5) Edit /usr/share/gerrit/etc/gerrit.conf
and it modify it to looks like this:

[gerrit]
basePath = git
[database]
type = H2
database = db/ReviewDB
[auth]
type = LDAP
[sendemail]
smtpServer = localhost
[container]
user = tomcat
javaHome = /usr/lib/jvm/jdk1.6.0_26/jre
[sshd]
listenAddress = MYIP:8418
[httpd]
listenUrl = http://*:8282/
[cache]
directory = cache
[ldap]
server = ldap://MYIP:10389
username = uid=gerrit,ou=users,ou=system
password = gerrit
accountBase = ou=Users,dc=MYHOST
accountPattern = (&(objectClass=person)(uid=${username}))
accountFullName = displayName
accountEmailAddress = mail

groupBase = ou=Groups,dc=MYHOST
groupMemberPattern = (&(objectClass=groupOfUniqueNames)(uniquemember=${dn}))

Where you need to replace MYIP, MYHOST with the IP and the host name of the machine.
Note the LDAP configuration. We need to add gerrit user to ou=system and create the MYHOST domain structure.

6) Install ApacheDS LDAP server for user management. (There is a RPM package for Fedora, so just download and follow installation instructions).

7) We need to configure ApacheDS.
Open /var/lib/apacheds/default/conf/server.xml and add new partition

<jdbmPartition id="MYHOST" suffix="dc=MYHOST" optimizerEnabled="true" syncOnWrite="true" cacheSize="100"/gt;

Replace MYHOST with machine hostname.

Remove anonymous access

<defaultDirectoryService ... allowAnonymousAccess="false" ... >

7) Start the service

service apacheds start default

8) Install and Apache Directory Studio and connect to LDAP server

ldap://MYHOST:10389

where MYHOST is the hostname/IP address of the machine
The default username is "uid=admin,ou=system" and password is "secred"

Go to ou=system, and select uid=admin. Change the userPassword attribute with new password


9) Add new user to ApacheDS. Open Apache Directory Studio and import following LDIF

dn: uid=gerrit,ou=users,ou=system
objectClass: organizationalPerson
objectClass: person
objectClass: inetOrgPerson
objectClass: top
cn: gerrit administrator
sn: gerrit
displayName: Gerrit administrator
uid: gerrit
userPassword:: e1NIQX1PNWNIRFViTTFtUWlxT2U0UG1sbjdZUjRCVGc9

It contains a user gerrit and password gerrit

9) Create init.ldif file containing

#########################################################
# Root node for domain
#########################################################
dn: dc=MYHOST
objectClass: domain
objectClass: extensibleObject
objectClass: top
dc: MYHOST

#########################################################
# Root node for Users
#########################################################
# The node contains all users
dn: ou=Users,dc=MYHOST
objectClass: organizationalUnit
objectClass: top
ou: Users

#########################################################
# Root node for Groups
#########################################################
# Each group contains the user Ids assigned to the group
dn: ou=Groups,dc=MYHOST
objectClass: organizationalUnit
objectClass: top
ou: Groups

#########################################################
# Groups
#########################################################
dn: cn=admins,ou=Groups,dc=MYHOST
objectClass: groupOfUniqueNames
objectClass: top
cn: admins
description: Administrators group
uniquemember: uid=user1,ou=Users,dc=MYHOST

dn: cn=developers,ou=Groups,dc=MYHOST
objectClass: groupOfUniqueNames
objectClass: top
cn: developers
description: Developers group
uniquemember: uid=admin,ou=system
uniquemember: uid=user1,ou=Users,dc=MYHOST
uniquemember: uid=user1,ou=Users,dc=MYHOST

dn: cn=guests,ou=Groups,dc=MYHOST
objectClass: groupOfUniqueNames
objectClass: top
cn: guests
description: Guests group
uniquemember: uid=admin, ou=system

#########################################################
# Users
#########################################################
dn: uid=user1,ou=Users,dc=MYHOST
objectClass: organizationalPerson
objectClass: person
objectClass: extensibleObject
objectClass: uidObject
objectClass: inetOrgPerson
objectClass: top
cn: John Smith
givenname: John
sn: Smith
displayName: John Smith Jr.
mail: johnsmith@MYHOST
ou: Users
uid: user1
userpassword:: e1NIQX1zOXFuZTB3RXFWVWJoNEhRTVpIK0NZOHlYbWM9

dn: uid=user2,ou=Users,dc=MYHOST
objectClass: organizationalPerson
objectClass: person
objectClass: extensibleObject
objectClass: uidObject
objectClass: inetOrgPerson
objectClass: top
cn: Joe Doe
givenname: Joe
sn: Doe
displayName: terminator
mail: JoeDoe@MYHOST
ou: Users
uid: user2
userpassword:: e1NIQX1vWWdjQnU3SmJibVFISHUvNUJ4Q28vQ09uTFE9

Replace MYHOST with the name of the host. If your host have full domain name, then replace dc=MYHOST, with dc=mysubdomain,dc=mydomain,dc=com

The file describes a simple Groups/User hierarchy with 3 groups: admins,developers,users and 2 users: user1 (password:user1) and user2 (password:user2)

10) Using Apache Directory Studio import init.LDIF into LDAP server

11) Start tomcat service

service tomcat7 start

12) Stop tomcat service

service tomcat7 stop

13) Copy Bouncy castle jars to /usr/share/tomcat7/webapps/gerrit/WEB-INF/libs

cp /usr/share/gerrit/lib/bcprov-jdk16-144.jar /usr/share/tomcat7/webapps/gerrit/WEB-INF/lib

14) Start tomcat service and now you must be able to login to gerrit system with user1/user1 or user2/user2

15) Generating public/private keys.
Windows:
Download puttygen.exe and use it to generate a new private/public key. Use the menu Conversion / Export OpenSSH key to export the private key. Copy the OpenSHH public key (from the textbox)

Linux:

ssh-keygen -t rsa

Will generate /home/user/.ssh/id_rsa and /home/user/.ssh/id_rsa.pub
Copy the content of id_rsa.pub

16) Login into gerrit go to settigs, SSH key and paste the OpenSSH key (generated from the puttygen or ssh-keygen). Don't forget to click "Add"

17) Testing ssh connection. From Linux shell (or cygwin on windows boxes)

ssh -p 8418 -i <path to the private key> <gerrit IP/host>

18) Creating new project.

ssh -p 8418 -i <path to the private key> <gerrit IP/host> gerrit create-project -n <project name>

19) Go to Gerrit, choose "Admin" / "Projects" and select the newly created project.
Go to "Access" and add Submit,Push,Read permissions to "Registered Users" group

20) Cloning the newly created project for the first time.

git config --global user.name "Your Name"
git config --global user.email you@example.com
git config --global core.autocrlf false

git clone ssh://GERRIT_HOST:8418/PROJECT_NAME.git
cd PROJECT_NAME
git config remote.origin.push HEAD:refs/for/master
git config branch.master.remote origin
git config branch.master.merge refs/heads/master
echo Hello > readme.txt
git add readme.txt
git commit -m "Initial commit"
git push

After that the warning messages "You appear to have cloned an empty repository." or "remote HEAD refers to nonexistent ref, unable to checkout." will disappear.

FC15 post installation steps

Gnome shell 3

Showing date in taskbar

gsettings set org.gnome.shell.clock show-date true

Showing date in taskbar

gsettings set org.gnome.shell.calendar show-weekdate true

Show week numbers in calendar

gsettings set org.gnome.shell.calendar show-weekdate true

Show minimize, maximize buttons

gconftool-2 -s -t string /desktop/gnome/shell/windows/button_layout "menu:minimize,maximize,close"

Always show power off in menu

yum install gnome-shell-extensions-alternative-status-menu

More info about available extensions can be found here

Tweak-tool

yum install gnome-tweak-tool

Then use start it go to Desktop and enable "Have file manager handle the desktop"

Taskbar

yum install tint2

Then use gnome-session-properties utility to add tint2 to gnome auto start programs (/usr/bin/tint2)

Nautilus

Show hidden files

gsettings set org.gnome.nautilus.preferences show-hidden-files true

Show address bar instead of buttons for file path

gsettings set org.gnome.nautilus.preferences always-use-location-entry true

Configurations

Additional repositories

Add RPM fusion repos:

su -c 'yum localinstall --nogpgcheck http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-stable.noarch.rpm http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-stable.noarch.rpm'

Admin rights

Add sudo capabilities to current user:

usermod -a -G wheel `whoami`

Startup theme

Change the startup theme:

sudo yum install plymouth-theme*

sudo plymouth-set-default-theme --list

sudo plymouth-set-default-theme solar -R

Keyboard mappings

Install gconf-editor:

sudo yum install gconf-editor

Now open gconf-editor from command line and do following modifications:

windows + D to show desktop

Find the key "/apps/metacity/global_keybindings/show_desktop" and set the value to "<mod4>D"

windows + R to run command

Find the key "/apps/metacity/global_keybindings/panel_run_dialog" and set the value to ""<mod4>R"

windows + L to lock screen

Find the key "/apps/metacity/global_keybindings/run_command_1" (or any other number and set the value to ""<mod4>L". Find the key "/apps/metacity/keybinding_commands/command_1" and set the value to "gnome-screensaver-command -l"

Windows aliases

notepad

sudo alternatives --install /usr/bin/notepad notepad /usr/bin/gedit 1

explorer

sudo alternatives --install /usr/bin/explorer explorer /usr/bin/nautilus 1

cmd

sudo alternatives --install /usr/bin/cmd cmd /usr/bin/gnome-terminal 1

Installing additional software

Music player - XMMS

sudo yum install xmms xmms-faad2 xmms-mp3 xmms-pulse xmms-skins

Video players

mplayyer

sudo yum install mplayer gecko-mediaplayer mplayer-gui mencoder

VLC

sudo yum install vlc

Gnome-tweak-tool

sudo yum install gnome-tweak-tool

It can be used to change variety of options. Go to "Windows" and change "Current theme" to "Crux". Go to "File manager" and change "Have file manager handle desktop" to "Yes".

MS fonts

sudo yum install rpm-build cabextract ttmkfdir wget xfs

sudo rpm -ih http://dl.atrpms.net/all/chkfontpath-1.10.1-2.fc14.x86_64.rpm

sudo wget http://corefonts.sourceforge.net/msttcorefonts-2.0-1.spec

sudo rpmbuild -ba msttcorefonts-2.0-1.spec

sudo yum install --nogpgcheck /root/rpmbuild/RPMS/noarch/msttcorefonts-2.0-1.noarch.rpm

Chrome

Go to www.google.com/chrome and follow instructions

Flash

Go to Adobe flash and choose linux 64 (Step1) and YUM 64 (Step2) Install the downloaded RPM it will add the adobe YUM repos. Install the real flash player with:

yum install flash-plugin nspluginwrapper.x86_64 nspluginwrapper.i686 alsa-plugins-pulseaudio.i686 libcurl.i686

Now Firefox should be able to play flash video (try it with youtube) In order to make Chrome playing flash videos executes following commands:

mkdir /opt/google/chrome/plugins

ln -s /usr/lib64/mozilla/plugins/libflashplayer.so /opt/google/chrome/plugins/libflashplayer.so

Skype

Go to http://www.skype.com/intl/en/get-skype/on-your-computer/linux/downloading.fedora and follow instructions

Show system information as background - conky

sudo yum install conky

Then use gnome-session-properties utility to add conky to gnome auto start programs (/usr/bin/conky)A simple configuration file /etc/conky/conky.conf

alignment top_right

background no

border_width 1

cpu_avg_samples 2

default_color white

default_outline_color white

default_shade_color white

draw_borders no

draw_graph_borders yes

draw_outline no

draw_shades no

use_xft yes

xftfont DejaVu Sans Mono:size=12

gap_x 5

gap_y 60

minimum_size 5 5

net_avg_samples 2

no_buffers yes

out_to_console no

out_to_stderr no

extra_newline no

own_window_transparent yes

own_window yes

own_window_class Conky

own_window_type desktop

stippled_borders 0

update_interval 1.0

uppercase no

use_spacer none

show_graph_scale no

show_graph_range noTEXT

#${scroll 32 $nodename - $sysname $kernel on $machine | }

$nodename - $sysname $kernel

$hr

${color grey}Uptime:$color $uptime

${color grey}Frequency (in GHz):$color $freq_g

${color grey}RAM Usage:$color $mem/$memmax - $memperc% ${membar 4}

${color grey}Swap Usage:$color $swap/$swapmax - $swapperc% ${swapbar 4}

${color grey}CPU Usage:$color $cpu% ${cpubar 4}

${color grey}Temperature:$color $acpitemp% ${color grey}Fan speed:$color $acpifan

${color grey}Processes:$color $processes  ${color grey}Running:$color $running_processes

$hr

${color grey}File systems:

/ $color${fs_used /}/${fs_size /} ${fs_bar 6 /}

${color grey}Networking:

Up:$color ${upspeed eth0} ${color grey} - Down:$color ${downspeed eth0}

$hr

${color grey}Name              PID   CPU%   MEM%

${color lightgrey} ${top name 1} ${top pid 1} ${top cpu 1} ${top mem 1}

${color lightgrey} ${top name 2} ${top pid 2} ${top cpu 2} ${top mem 2}

${color lightgrey} ${top name 3} ${top pid 3} ${top cpu 3} ${top mem 3}

${color lightgrey} ${top name 4} ${top pid 4} ${top cpu 4} ${top mem 4}

All the information is found by googling. You can find some very useful tips here and here and here
Thanks guys!

VNC server under F14

1) Install the vnc server by suing following command:

yum install tigervnc tigervnc-server

2) Under the user that will be used to login execute:

vncpasswd

This is the password that you will use to connect to the server

3) Configure the displays by editing /etc/sysconfig/vncservers

nano /etc/sysconfig/vncservers

Make sure that you have something like this

VNCSERVERS="1:the_user_that_is_used_for_vnc"
VNCSERVERARGS[1]="-geometry 1280x1024"

4) Then start the service for the first time:

service vncserver start

5) And make sure that the service is starting everytime you restart your machine:

chkconfig vncserver on

6) also don't forget to add firewall rules - use gnome tools from System / Administration / Firewall... Allow connections to port 5901

7) Now you can connect to the VNC server with ip and the display number e.g.: 192.160.0.254:1

How to list registered EJB beans in Glassfish

http://www.myeclipseide.com/PNphpBB2-viewtopic-t-18850.html

1) Open the Glassfish Admin Console
2) Select the "Application Server" tree node
3) In the "General" tab under "General Information" choose JNDI browsing
4) Under the "ejb" tree you can find all registered EJB beans

How to enable Remote Desktop on remote machine

http://oreilly.com/windows/archive/server-hacks-remote-desktop.html
1) connect on the machine using regedit.exe (from File / Connect Network Registry)
2) Go to the key HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server
3) Change fDenyTSConnection from 1 (Remote desktop disabled) to 0 (Remote desktop enabled)
4) Restart the system by using the command
shutdown -m \\ -r

Installing OpenId-server on mysql

1) Download the JosID war file.
wget http://mirrors.redv.com/pub/jos/jos-1.2.1/jos-webapp-1.2.1.war
2) Deploy it on tomcat server
cp jos-webapp-1.2.1.war /usr/share/tomcat7/webapps/josid.war
3) start tomcat and stop it in order to extract the war content.
5) Copy the context.xml from the WAR to the tomcat/conf dir
cp /usr/share/tomcat7/webapps/josid/META-INF/context.xml /usr/share/tomcat7/conf/Catalina/localhost/josid.xml
6) Edit /usr/share/tomcat7/conf/Catalina/localhost/josid.xml and change the jdbc/jos resource and the Hybernate dialect:


<Resource
name="jdbc/jos"
type="javax.sql.DataSource"
driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/jos"
username="jos"
password="secret" />

<Environment
name="hibernate.dialect"
type="java.lang.String"
value="org.hibernate.dialect.MySQL5Dialect" />

Also change the password
<Environment
name="domain.configurator.password"
type="java.lang.String"
value="secret"
override="false" />

7) Download the mysql-connector and put it in tomcat/lib directory
8) Create the mysql database
CREATE USER 'jos'@'localhost' IDENTIFIED BY 'secret';
CREATE DATABASE jos;
GRANT ALL ON jos.* TO 'jos'@'localhost';
FLUSH PRIVILEGES;
9) start tomcat
10) open the josid URL and use the password previously configured in josid.xml

Maven on F14

1) wget http://apache.online.bg//maven/binaries/apache-maven-3.0.2-bin.tar.gz
2) tar -zxvf apache-maven-3.0.2-bin.tar.gz
3) cp -R apache-maven-3.0.2 /usr/share/
4) ln -s /usr/share/apache-maven-3.0.2/ /usr/share/maven
5) update-alternatives --install /usr/bin/mvn mvn /usr/share/maven/bin/mvn 1
6) update-alternatives --config mvn
Just to make sure that it is using the correct path.

Tomcat 7 on Fedora 14

First let install tomcat6 so we have some template from where to copy the scripts:
0) yum install tomcat6

Now lets configure the service:
1) cp -R /etc/init.d/tomcat6 /etc/init.d/tomcat7
2) Edit /etc/init.d/tomcat7 and change all occurrences of tomcat6 to tomcat7


Now lets configure the script that actually starts the tomcat:
3) cp -R /usr/sbin/tomcat6 /usr/sbin/tomcat7
4) Edit /usr/sbin/tomcat7 and change all occurrences of tomcat6 to tomcat7


Next let's make the configuration & log directories:
5) mkdir /etc/tomcat7
6) mkdir /var/log/tomcat7

Now download the tomcat archive distribution:
7) Download tomcat7.tar.gz and extract it into /usr/share/tomcat7

Copy the configuration files in Fedora standart config dir:
8) cp -R /usr/share/tomcat7/conf /etc/tomcat7
9) rm -Rf /usr/share/tomcat7/conf
10) ln -s /etc/tomcat7 /usr/share/tomcat7/conf

Make the tomcat7 to use the standard Fedora log directory:
11) rm -Rf /usr/share/tomcat7/logs
12) ln -s /var/log/tomcat7 /usr/share/tomcat7/logs

Configure the tomcat7 options:
13) cp /etc/tomcat6/tomcat6.conf /etc/tomcat7/tomcat7.conf
14) Edit /etc/tomcat7/tomcat7.conf and change all occurrences of tomcat6 to tomcat7

Specify temp & work dirs:
15) mkdir -p /var/cache/tomcat7/work
16) mkdir -p /var/cache/tomcat7/temp
17) rm -Rf /usr/share/tomcat7/work
18) rm -Rf /usr/share/tomcat7/temp
19) ln -s /var/cache/tomcat7/work /usr/share/tomcat7/work
20) ln -s /var/cache/tomcat7/temp /usr/share/tomcat7/temp

Fix the permissions:
21) chgrp -R tomcat /usr/share/tomcat7
22) chmod -R ug+rwx /usr/share/tomcat7
23) chgrp -R tomcat /var/log/tomcat7
24) chmod -R ug+rwx /var/log/tomcat7
25) chgrp -R tomcat /var/cache/tomcat7
26) chmod -R ug+rwx /var/cache/tomcat7

Add administrator user so you can manage the server:
27) Edit /etc/tomcat7/tomcat7.conf and following lines
<role rolename="admin"/>
<role rolename="admin-gui"/>
<role rolename="admin-script"/>
<role rolename="manager"/>
<role rolename="manager-gui"/>
<role rolename="manager-script"/>
<role rolename="manager-jmx"/>
<role rolename="manager-status"/>
<user name="admin" password="adminadmin" roles="admin,manager,admin-gui,admin-script,manager-gui,manager-script,manager-jmx,manager-status" />



Now start the service and everything should works fine:
28) service tomcat7 start

Finally you can start the service on everyboot
29) chkconfig tomcat7 on

NVidia driver F14 x86_64

По default F14 идва с nouveau драйвер зa видео картата. Ако искате да сложите нов дравер направете следното:
1. Сваляне на драйвера от www.nvidia.com (NVIDIA-Linux-x86_64-260-19.36.run)
2. Reboot и по време на GRUB избирате опция за допълнителни параметри към kernel (от менюто избирате 'a'). Добавяте параметъра single накрая на реда.
3. Когато се стартира системата, няма да ви иска парола.
Изпълнявате init 3
4. Логвате се с root
5. Изпълнявате NVIDIA-Linux-x86_64-260-19.36.run. Най-вероятно ще излезе грешка, че nouveau е активен.
6. Изберете yes за modprobe disable стъпката.
7. Изпълнете 2-5 отново. Ако пак възникне грешка, тогава трябва да се направи едно от двете:
7а. Редактирате /boot/grub/grub.conf и на реда в който започва с kernel накрая добавяте параметъра rdblacklist=nouveau (това е същия ред който редактирате от GRUB-a)
7b. Променяте initramfs като изпълните командите
mv /boot/initramfs-$(uname -r).img /boot/initramfs-$(uname -r)-nouveau.img
dracut /boot/initramfs-$(uname -r).img $(uname -r)
8. Повтаряте стъпките от 2-5 и този път не трябва да ви даде грешка за nouveau. Избирате да инсталирате opengl32 и да конфигурирате X средата

Как да инсталираме skype под F14

http://yunustj.wordpress.com/2010/07/18/how-to-install-skype-on-to-fedora-13-x86_64/

yum whatprovides

ни дава информация кой пакет да инсталираме за да имаме дадената библиотека.

E: skype: error while loading shared libraries: libasound.so.2: cannot open shared object file: No such file or directory
S: yum install alsa-lib.i686

E: skype: error while loading shared libraries: libXv.so.1: cannot open shared object file: No such file or directory
S: yum install libXv.i686

E: skype: error while loading shared libraries: libXss.so.1: cannot open shared object file: No such file or directory
S: yum install libXScrnSaver.i686

E: skype: error while loading shared libraries: libQtDBus.so.4: cannot open shared object file: No such file or directory
S: yum install qt.i686

E: skype: error while loading shared libraries: libQtGui.so.4: cannot open shared object file: No such file or directory
S: yum install qt-x11.i686

На стъпката с libQtDBus.so.4 имах доста проблеми, защото имаше конфликти с вече инсталирани пакети. Това което си спомням, че направих е да инсталирам qt.x86_64, т.е.:

yum install qt.x86_64
yum install qt.i686

И по някакъв магически начин след това нямаше конфликти :-)

Активни транзакции в Oracle

Ето и едно скрипче което показва активните транзакции в Oracle.

SELECT
s.osuser, vp.spid as os_pid, S.BLOCKING_SESSION blocker,
S.SID, S.SERIAL#, S.USERNAME, S.MACHINE,
Q.SQL_FULLTEXT cur_sql, PQ.SQL_FULLTEXT prev_sql,
vt.used_urec, vt.start_date
FROM
v$session S
LEFT JOIN v$sqlarea Q on S.SQL_ID = Q.SQL_ID
LEFT JOIN v$sqlarea PQ on S.PREV_SQL_ID = PQ.SQL_ID
LEFT JOIN v$process vp on s.paddr = vp.addr
LEFT JOIN v$transaction vt on s.saddr = vt.ses_addr
WHERE
vt.start_date < SYSDATE - (5/1440)
-- AND
-- s.machine = 'machine.name'
ORDER BY
S.SID
;

Thread dump на Glassfish

Понякога се налага да се проверят разни продъкшан системи защо забиват и т.н.
Един добър начин това да се направи, е чрез използването на JMX менидмънт бийновете.

Ot \bin се пуска jconsole въвежда се следния remote process

service:jmx:rmi:///jndi/rmi://127.0.0.1:8686/jmxrmi

и се въвеждат администраторските пароли за glassfish-а.

След това се следва туторияла за jconsole-ата
http://download.oracle.com/javase/6/docs/technotes/guides/management/jconsole.html

Интересното е таба Threads и отдолу има списък с тредовете и техния stacktrace

Пълно форматиране на харда от Windows 7 DVD

Може би някои са забелязали, новият инсталатор нa Windows вече няма full format, а само quick. Това супер, ако все пак не се нуждаете от проверка за лоши сектори или искате тотално да затриете информацията. Следната процедура позволява пълно форматиране

1. Започнете инсталиране от DVD-то
2. На екрана "Where do you want to install Windows" изтрийте всичките партишъни и създайте нов празен.
3. Форматирайте го - това е quick формата
4. Натиснете Shift + F10 (ще се отвори конзола)
6. От команд промпта напишете "format c:". Параметъра /P:<число> ще занули съдържанието на секторите.

Show available disks drives under Linux (Fedora)

Somebody wondering how to show all attached hard disks / CD DVD drives under Linux?

Here is a small program that do just that. It works perfectly under Fedora 13. Copy/Past the text in file called /usr/bin/lshdd

#!/bin/bash
if [ "$1" == "-v" ]; then
  verbose="true"
else
  verbose="false"
fi

lshal | awk -v verbose=$verbose 'BEGIN {
  name=""
}
{
  if ($0~"^udi = ") {name=""}
  if ($0~"^udi = ./org/freedesktop/Hal/devices/storage_serial_.*") {
    match($3, "/org/freedesktop/Hal/devices/storage_serial_(.*).", arr);
    name=arr[1]
  }
  if ($0~"^udi = ./org/freedesktop/Hal/devices/storage_model.*") {
    match($3, "/org/freedesktop/Hal/devices/storage_model_(.*).", arr);
    name=arr[1]
  }
  if (name!="" && $0~"block.device") {
    match($3, "(/dev/.*).", arr);
    if (verbose~"true") {
      print arr[1] " = " name
    } else {
      print arr[1]
    }
    name = ""
  }
}'

Change the file permissions:

chmod a+x /usr/bin/lshdd

Then you can list your hard & dvd drives:

lshdd -v

and the output looks like:

/dev/sr0 = DVD__RW_TS_L632D
/dev/sdb = WDC_WD50_00AAVS_00ZTB0_D577A3503523_0_0
/dev/sda = SAMSUNG_HM400LI_S1PSJ10Q710844

You can easily find the partitions of specific drive

fdisk -l /dev/sdb

P.S. It is my first awk script, so it really looks ugly, I know ;-)

Fedora startup theme

Федора ползва plymouth за да покаже анимацията по-време на бутването, преди да се е заредло Х-а. Готиното е, че plymouth може да се наглася и да се слагат различни теми ;-)

yum install plymouth-theme*
plymouth-set-default-theme --list
plymouth-set-default-theme solar -R
#plymouth-set-default-theme solar --rebuild-initrd

Mount-ване на windows shares

sudo mount -t cifs -o username=myuser,password=secret,uid=myuser,gid=mygroup //10.1.52.25/c$ /mnt

Параметри са:
username,password са Windows credential
uid,gid потребителят и групата на owner-а на /mnt

Част от параметрите може и да се пропуснат:

sudo mount -t cifs -o username=myuser,uid=myuser //10.1.52.25/c$ /mnt

Nautilus address bar

Nautilus може да показва пътят до файла като бутони или като стринг. По подразбиране се ползват бутони. За да се промени тази настройка трябва да се промени стойността на полето (unchecked)
/apps/nautilus/preferences/always_use_location_entry от gconf-editor.

Ако gconf-editor, трябва да се инсталира с yum install gconf-editor*

Show desktop

След като си инсталирах новата Fedora 13 ми се прииска да си имам любимият Show Desktop бутон, който да показва десктопа. В самата дистрибуция има такъв бутон, но логиката му е странна и не ми харесва - първо първо натискане прави restore all hidden windows, второто натискане hide all windows. Това което на мене ми трябва е: при натискане да показва десктопа.

Ето как става това:

1. yum install wmctrl*
2. Right click on the panel and choose Add to panel > Custom application launcher
3. Type: Application,
Name: Show Desktop
Command: wmctrl -k on
4. choose the icon
5. click OK.

Инсталиране на Sun JDK на Fedora

1) Сваляте Sun-ското JDK от java.sun.com като bin файл
2) chmod a+x на bin файла и го стартирате
3) копирате съдържанието на разархивираната директория (например jdk1.6.0_20) в /usr/lib/jvm/jdk-1.6.0_20-sun (която трябва да създадете)
4) използвате командата update-alternatives за да добавите новата java
5) update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-1.6.0_20-sun/bin/java 1
6) update-alternatives --config java
и избирате нововъведения път
7) изпълнявате java -version и проверявате дали е правилната java на Sun