Technology – Page 6 – Nosce Te Ipsum

Life

Nice Chinese Dict. for handhelds

August 16, 2010
by Muhammad

Key Features

wonderful app. though a little bit expensive.

General Unix

Room Booking system

July 1, 2010
by Muhammad

a good and an open source room booking system

MRBS

http://mrbs.sourceforge.net/

General Unix

install ffmpeg with codecs on Linux Redhat / CentOS

June 23, 2010June 23, 2010
by Muhammad

this guide is from http://wiki.razuna.com/display/ecp/FFMpeg+Installation+on+CentOS+and+RedHat

There are a couple of different ways to install FFMpeg and the required libraries. We are showing both ways here.

Recommended way

Install the additional repo

rpm -Uhv http://apt.sw.be/redhat/el5/en/x86_64/rpmforge/RPMS/rpmforge-release-0.3.6-1.el5.rf.x86_64.rpm

Update repository

yum -y update

Install all necessary packages

yum install SDL-devel a52dec a52dec-devel alsa-lib-devel faac faac-devel faad2 faad2-devel
yum install freetype-devel giflib gsm gsm-devel imlib2 imlib2-devel lame lame-devel libICE-devel libSM-devel libX11-devel
yum install libXau-devel libXdmcp-devel libXext-devel libXrandr-devel libXrender-devel libXt-devel
yum install libid3tag libogg-devel libvorbis-devel mesa-libGL-devel mesa-libGLU-devel xorg-x11-proto-devel xvidcore xvidcore-devel zlib-devel
yum install amrnb-devel amrwb-devel
yum install libtheora libtheora-devel
yum install glibc gcc gcc-c++ autoconf automake libtool
yum install subversion
yum install ncurses-devel
yum install libdc1394 libdc1394-devel
yum install yasm nasm

Install the essential codecs from FFmepg

wget http://www3.mplayerhq.hu/MPlayer/releases/codecs/all-20071007.tar.bz2
bunzip2 all-20071007.tar.bz2; tar xvf all-20071007.tar

mkdir /usr/local/lib/codecs/
mkdir /usr/local/lib64/codecs/
cp all-20071007/* /usr/local/lib/codecs/
cp all-20071007/* /usr/local/lib64/codecs/
chmod -R 755 /usr/local/lib/codecs/
chmod -R 755 /usr/local/lib64/codecs/

Grab FFmpeg

svn checkout -r 20525 svn://svn.mplayerhq.hu/ffmpeg/trunk ffmpeg

Grab the x264 library

wget ftp://ftp.videolan.org/pub/videolan/x264/snapshots/x264-snapshot-20091031-2245.tar.bz2

bunzip2 x264-snapshot-20091031-2245.tar.bz2; tar xvf x264-snapshot-20091031-2245.tar

Make sure x264 has not been installed

yum erase x264*

Compile x264

cd x264
./configure --enable-shared --prefix=/usr
make
make install

Compile FFmpeg (the configure options have to be on one line)

cd ffmpeg
./configure --enable-gpl --enable-nonfree --enable-postproc --enable-libfaad --enable-avfilter --enable-pthreads \
--enable-libxvid --enable-libx264 --enable-libmp3lame --enable-libfaac --disable-ffserver --disable-ffplay \
--enable-libtheora --enable-libvorbis --disable-ffplay --enable-shared --enable-avfilter-lavf --arch=x86_64
make
make install

(The –arch=x86_64 option should only be used if you are on a 64Bit System!)

Edit ld.so.conf

vi /etc/ld.so.conf

add this new line

/usr/local/lib

Activate the shared libraries

ldconfig

That’s it. This should give you a full functional FFMpeg installation for Razuna. Test it now with;

ffmpeg

This should give you the following back (yours might vary a bit);

FFmpeg version SVN-r20525, Copyright (c) 2000-2009 Fabrice Bellard, et al.
configuration: --enable-gpl --enable-nonfree --enable-postproc --enable-libfaad --enable-avfilter
--enable-pthreads --enable-libxvid --enable-libx264 --enable-libmp3lame --enable-libfaac
--disable-ffserver --disable-ffplay --enable-libamr-nb --enable-libamr-wb --enable-libtheora
--enable-libvorbis --disable-ffplay --enable-shared
libavutil     50. 4. 0 / 50. 4. 0
libavcodec    52.39. 0 / 52.39. 0
libavformat   52.39. 2 / 52.39. 2
libavdevice   52. 2. 0 / 52. 2. 0
libavfilter    1. 8. 0 /  1. 8. 0
libswscale     0. 7. 1 /  0. 7. 1
libpostproc   51. 2. 0 / 51. 2. 0

(your output might vary a bit)

Try to convert a movie with;

ffmpeg -i movie.mov -vcodec libx264 -vpre hq -acodec libfaac movie.mp4

If above fails you can try to compile each library on your own.

Please follow the below steps one by one to install FFMpeg on CentOS/RedHat 5.x. successfully.

Getting Started

razuna:$
razuna:$ mkdir -p ./tmp/ffmpeg-packages
razuna:$ cd ./tmp/ffmpeg-packages

Installing a52

razuna:$ wget http://liba52.sourceforge.net/files/a52dec-0.7.4.tar.gz

razuna:$ tar -zxf a52dec-0.7.4.tar.gz
razuna:$ cd a52dec-0.7.4
razuna:$ ./configure --enable-shared=PKGS
razuna:$ make && make install
razuna:$ cd ..

Installing FAAD2

razuna:$ wget http://downloads.sourceforge.net/faac/faad2-2.6.1.tar.gz
razuna:$ tar zxf faad2-2.6.1.tar.gz
razuna:$ cd faad2
razuna:$ autoreconf -vif
razuna:$ ./configure --disable-drm --disable-mpeg4ip
razuna:$ make && make install
razuna:$ cd ..

Installing FAAC

razuna:$ wget http://downloads.sourceforge.net/faac/faac-1.26.tar.gz
razuna:$ tar zxfv faac-1.26.tar.gz
razuna:$ cd faac
razuna:$ ./bootstrap
razuna:$ ./configure --disable-mp4v2
razuna:$ make && make install
razuna:$ cd ..

Installing LAME

razuna:$ wget http://superb-east.dl.sourceforge.net/sourceforge/lame/lame-3.98b8.tar.gz
razuna:$ tar zxfv lame-3.98b8.tar.gz
razuna:$ cd lame-3.98b8
razuna:$ ./configure
razuna:$ make && make install
razuna:$ cd ..

Installing yasm

YASM is a modular assembler, it is required by the x264 package.

razuna:$ wget http://www.tortall.net/projects/yasm/releases/yasm-0.7.0.tar.gz

razuna:$ tar zfvx yasm-0.7.0.tar.gz
razuna:$ cd yasm-0.7.0
razuna:$ ./configure
razuna:$ make && make install
razuna:$ cd ..

Installing x264

razuna:$ git clone git://git.videolan.org/x264.git
razuna:$ cd x264
razuna:$ ./configure --enable-shared --prefix=/usr && make && sudo make install

Installing Xvid

razuna:$ wget http://downloads.xvid.org/downloads/xvidcore-1.2.1.tar.gz
razuna:$ tar zxfv xvidcore-1.2.1.tar.gz
razuna:$ cd xvidcore-1.2.1/build/generic
razuna:$ ./configure
razuna:$ make && make install
razuna:$ cd ../../..

Installing FFmpeg

For FFMPEG, you will need to get the latest out of SVN. FFMPEG doesn’t ever make releases. To do so, run:

(the configure options have to be on one line)

razuna:$ svn checkout svn://svn.mplayerhq.hu/ffmpeg/trunk ffmpeg
razuna:$ cd ffmpeg
razuna:$ ./configure --enable-gpl  --enable-postproc --enable-nonfree --enable-postproc \
--enable-libfaad --enable-avfilter --enable-pthreads --enable-libxvid \
--enable-libx264 --enable-libmp3lame --enable-libfaac --disable-ffserver --disable-ffplay
razuna:$ make
razuna:$ make install

Apple OSX

Hide/Show MAC OS X user

June 8, 2010June 8, 2010
by Muhammad

to hide user in MAC OS X

create the account in System Pref. or by command line

========

sudo dscl . create /Users/$USERNAME
sudo dscl . create /Users/$USERNAME PrimaryGroupID 0
sudo dscl . create /Users/$USERNAME UniqueID 0
sudo dscl . create /Users/$USERNAME UserShell /bin/bash
sudo dscl . passwd /Users/$USERNAME $PASSWORD
sudo dscl . append /Groups/admin GroupMembership $USERNAME

Replace $USERNAME and $PASSWORD with the username and password you want to use.
===============

The new account will be created as a root-level account. If you like, change the PrimaryGroupID and UniqueID to something else.

to see the UID of users

====
dscl . list /Users UniqueID
====

set their UID to be less than 500
to change the UID

====
dscl . -change /Users/will UniqueID 501 1000
====

above command changes UID from 501 to 1000 for user “will”

following command will hide all such users from login window (system pref. accounts window)
====
sudo defaults write /Library/Preferences/com.apple.loginwindow Hide500Users -bool TRUE
====

to hide an account manually use this command
====
sudo defaults write /Library/Preferences/com.apple.loginwindow HiddenUsersList -array-add ‘account1’
====

after hiding the users there can be “others” appearing in the login window. to remove this use this command
====
sudo defaults write /Library/Preferences/com.apple.loginwindow SHOWOTHERUSERS_MANAGED -bool FALSE
====

you can use above commands in reverse to show the users in System Prefs. e.g.

command below will show the hidden users in System Prefs and Login windows
====
sudo defaults write /Library/Preferences/com.apple.loginwindow Hide500Users -bool FALSE
====

General Unix

Alternate to VMPS / Dynamic VLAN assignment on routers

June 4, 2010June 4, 2010
by Muhammad

As VMPS implementation is now a thing of past on most routers specially Cisco, an open source software based solution is available for those who still need Dynamic VLANs in their network. Information is available at URL below:

http://freenac.net/

Apple OSX

Wireshark on MAC

June 3, 2010
by Muhammad

Wireshark under MAC uses X-11 to run and on BSD-flavored systems, such as OS X, libpcap opens a BPF device to do a capture. You’d need to make the BPF devices on your system readable by you in order to capture (you could also run Wireshark as root, but that’s overkill, and runs a rather large chunk of code as root).

You could do

sudo chown {your account name} /dev/bpf*

to do that, but that would have to be done after every reboot. To do that automatically, you could install the ChmodBPF startup item from recent versions of libpcap on your system in /Library/StartupItems and edit the commands in the StartService() shell function in ChmodBPF/ChmodBPF to do the appropriate chown and possibly chmod commands.

General Unix

Zimbra handy guide

May 28, 2010May 28, 2010
by Muhammad

# search for users with forwarding address set

su – zimbra
zmprov sa -v zimbraPrefMailForwardingAddress=* | grep -e “uid” -e “zimbraPrefMailForwardingAddress”

output will be
uid: user1
zimbraPrefMailForwardingAddress: mail@myforwardaddress.com
uid: user2
zimbraPrefMailForwardingAddress: mai2l@myforwardaddress.com

# Zimbra Directory Schema which can be helful to find the correct syntax to use in zimbra provisioning commands is available at:

http://wiki.zimbra.com/wiki/5.0.11_Directory_Schema

Apple OSX

Spamassassin rules

May 27, 2010February 13, 2017
by Muhammad

a good guide is here
http://commons.oreilly.com/wiki/index.php/SpamAssassin/SpamAssassin_Rules

#to block combination of words in incoming email’s body

body __LOCAL_PASSWORD1 /\bWAB\b/i
body __LOCAL_PASSWORD2 /\bWestern Academy of Beijing\b/i
body __LOCAL_PASSWORD3 /\bpassword\b/i
meta LOCAL_MULTIPLE_PASS1 (__LOCAL_PASSWORD1 && __LOCAL_PASSWORD3)
score LOCAL_MULTIPLE_PASS1 200
meta LOCAL_MULTIPLE_PASS2 (__LOCAL_PASSWORD2 && __LOCAL_PASSWORD3)
score LOCAL_MULTIPLE_PASS2 200

#to block or notify as spam if a word is present in an incoming email

body LOCAL_PASSWORD /\bpassword\b/i
score LOCAL_PASSWORD 35
describe NO_PASSWORD This rule informs the email recipient that email might be \
spam

#to block emails to certain email addresses

header LOCAL_DISTLIST ALL =~ /^(?:to|cc|):.*itstaff\@wab\.edu/im
describe LOCAL_DISTLIST sent from or to friend@public.com
score LOCAL_DISTLIST 500

Releasing mails from quarantine
Using amavis-release

The utility amavisd-release (amavisd-new-2.3.3 or later) tells the amavisd daemon to fetch a mail from a local quarantine, and send it to MTA through its regular channels ($notify_method), bypassing re-checking.

amavisd-release is included in the amavisd source tarball (which in turn is included in the source rpm), but unfortunately OpenPKG does not install it by default. To manually extract it do the following (this assumes your host distribution has ‘rpm’ installed, but OpenPKG-internal tools should work as well):

$ cp amavisd-.src.rpm /tmp
$ cd /tmp
$ rpm2cpio amavisd-.src.rpm | cpio -idmv
$ tar xzf amavisd-new-.tar.gz
$ cp amavisd-/amavisd-release /kolab/sbin/
$ chown kolab:kolab /kolab/sbin/amavisd-release

By default it connects to socket /var/amavis/amavisd.sock, on which amavisd should be listening for AM.PDP protocol, but one can use inet socket instead of a Unix socket if there is a need to run amavisd-release from a remote host.

In the amavisd.conf.template the following should be added:

# $unix_socketname = “$MYHOME/amavisd.sock”; # listen on Unix socket
$unix_socketname = “/kolab/var/amavisd/amavisd see this site.sock”; # listen on Unix socket

# alternatively (less common):
# $inet_socket_port = [10024, 9998]; # listen on listed inet tcp ports

# apply policy bank AM.PDP-SOCK on a Unix socket:
# (note that this precludes the use of old amavis-milter
# helper program (with sendmail) on the same socket)
$interface_policy{‘SOCK’} = ‘AM.PDP-SOCK’;

# apply policy bank AM.PDP-INET to some inet tcp socket, e.g. tcp port 9998:
$interface_policy{‘9998’} = ‘AM.PDP-INET’;

$policy_bank{‘AM.PDP-SOCK’} = {
protocol => ‘AM.PDP’, # select Amavis policy delegation protocol
auth_required_release => 0, # don’t require secret_id for amavisd-release
};
$policy_bank{‘AM.PDP-INET’} = {
protocol => ‘AM.PDP’, # select Amavis policy delegation protocol
inet_acl => [qw( 127.0.0.1 [::1] )], # restrict access to these IP addresses
# auth_required_release => 0, # don’t require secret_id for amavisd-release
};

Setting of $auth_required_release decides whether the requestor needs to specify secret_id in addition to mail_id to authorize a mail release. The secret_id is stored in SQL table msgs when logging to SQL is enabled, otherwise this information is not accessible.

Note that turning off $auth_required_release check is safe as long as access to the socket is restricted, like with file protections on a Unix socket, or restricted with inet_acl to specific IP addresses. Enabling or disabling $auth_required_release is a management / setup decision and convenience.

To release a mail message an exact quarantine location should be specified as an argument to amavisd-release, e.g.:

$ amavisd-release /kolab/var/amavisd/virusmails/spam-UM3XM3XDbN52.gz

The amavisd-release utility also accepts mail_id from STDIN if releasing more than one message in one go is more convenient:

$ amavisd-release –
/kolab/var/amavisd/virusmails/spam-UM3XM3XDbN52.gz
/kolab/var/amavisd/virusmails/spam-gnwKVFKiuey3.gz
/kolab/var/amavisd/virusmails/spam-Xpkj9mLLBHTR.gz

# allow local networks

header LOCAL_RCVD Received =~ /from.*$.*\[10\.\d+\.\d+\.\d+\]$/
describe LOCAL_RCVD Received from a local machine
score LOCAL_RCVD -5000

# allow local networks and specific email address

header LOCAL_RCVD Received =~ /from \S+\.example\.com\s+\(\S+\.example\.com\s+\[192\.168\..*\s+by\s+mandark\.labs\.example\.com/
describe LOCAL_RCVD Received from a local machine
score LOCAL_RCVD -50

Apple OSX

Apple Handy Guide

May 24, 2010May 28, 2010
by Muhammad

#restart apache server on Apple
sudo /usr/sbin/apachectl restart

#restart amavis
sudo /bin/launchctl unload /System/Library/LaunchDaemons/org.amavis.amavisd.plist
sudo /bin/launchctl load /System/Library/LaunchDaemons/org.amavis.amavisd.plist

# postfix
sudo postfix reload
or if you want master to reload
sudo /bin/launchctl unload /System/Library/LaunchDaemons/org.postfix.master.plist
sudo /bin/launchctl load /System/Library/LaunchDaemons/org.postfix.master.plist

Apple OSX

dotproject installation issues

May 24, 2010May 28, 2010
by Muhammad

deprecated error level issues after installation of the dotproject site

Under PHP 5.x, assigning a return value by reference is the default behavior. Updating the php.ini file will not solve the problem as dotproject overrides the php.ini settings internally. To resolve this issue edit the base.php file. It is located in the root directory for dodproject. Find the line:

error_reporting(E_ALL & ~E_NOTICE);

replace it with

error_reporting(E_COMPILE_ERROR|E_RECOVERABLE_ERROR|E_ERROR_E_CORE_ERROR);

No need to restart.

also add these lines in index.php of your site and phpinfo.php to remove any existing deprecated errors being reported

error_reporting(E_ALL & !E_DEPRECATED);
error_reporting(E_ALL & ~E_DEPRECATED);
error_reporting(E_ALL ^ E_DEPRECATED);

May 2025
M	T	W	T	F	S	S
« Oct
			1	2	3	4
5	6	7	8	9	10	11
12	13	14	15	16	17	18
19	20	21	22	23	24	25
26	27	28	29	30	31

Category: Technology

Recommended way

If above fails you can try to compile each library on your own.