Archive for the ‘linux’ Category

Installing FreeNX on openSuSE 11.1 servers

Saturday, April 28th, 2012

You need to add below repository to your system and install using zypper as following, as root :

zypper ar http://download.opensuse.org/repositories/home:/frispete:/RemoteDesktop/openSUSE_11.1/home:frispete:RemoteDesktop.repo

zypper in NX

zypper in FreeNX

Also find this quick user guide in pdf format : FreeNX Quick User Guide

PS. The user guide was obtained from http://mail.kde.org/pipermail/freenx-knx/2008-May/007059.html

Error Exporting from OpenERP GTK Client 5.0.16

Friday, April 6th, 2012

Recently, I have been unable to export Customer Invoices list from the GTK client 5.0.16. But I could export supplier invoices and all other forms just as easy. I can also export customer invoices using the web interface and using NanTic Koo KDE client.

I usually get this error while trying to export customer invoices list :

Traceback (most recent call last):
File “/home/user/openERP/openerp-client-5.0.16/bin/modules/gui/main.py”, line 1334, in _sig_child_call
res = wid.handlers[button_name]()
File “/home/user/openERP/openerp-client-5.0.16/bin/modules/gui/window/form.py”, line 281, in sig_save_as
win = win_export.win_export(self.model, self.screen.ids_get(), self.screen.fields, fields, parent=self.window, context=self.context)
File “/home/user/openERP/openerp-client-5.0.16/bin/modules/gui/window/win_export.py”, line 174, in __init__
self.fill_predefwin()
File “/home/user/openERP/openerp-client-5.0.16/bin/modules/gui/window/win_export.py”, line 241, in fill_predefwin
self.predef_model.append(([f['name'] for f in fields], export['name'], ‘, ‘.join([self.fields_data[f['name']]['string'] for f in fields])))
KeyError: u’reference’

I found out comparing old and new backups of my database, that there’s a line in ir.exports table that’s not showing in the predefined export fields. Deleting all rows in this table made the client functioning as it used to.

List of essential 100 open source applications for Linux and Windows

Sunday, April 1st, 2012

A list of top 100 open source applications for use with Linux and MS Windows :

http://www.ubuntulinuxhelp.com/top-100-of-the-best-useful-opensource-applications/

Suse 11.1 bash script to convert files mp4 to mp3

Monday, January 3rd, 2011

Find below script that converts MP4 files into MP3 :

Using mplayer and lameĀ :


#! /bin/bash
#
# Converts all MP4 files in the current directory to MP3s.
#
for f in *.mp4; do
newname=`echo $f | tr ' ' '_' `
mv "$f" $newname
f=$newname
mplayer $f -ao pcm:file=tmp.wav
lame -b 128 -q 2 tmp.wav ${f/.mp4/.mp3}
rm -f tmp.wav
done

Source page is here.

Batch converting audio files :

Sunday, May 16th, 2010

This script may be of interest and value :

File: convertomp3
#!/bin/bash
#
# Usage: convertomp3 fileextention
#
if [ $1 = "" ];then
  echo 'Please give a audio file extention as argument.'
  exit 1
fi

for i in *.$1
do
  if [ -f "$i" ]; then
  rm -f "$i.wav"
  mkfifo "$i.wav"
  mplayer \
   -quiet \
   -vo null \
   -vc dummy \
   -af volume=0,resample=44100:0:1 \
   -ao pcm:waveheader:file="$i.wav" "$i" &
  dest=`echo "$i"|sed -e "s/$1$/mp3/"`
  lame -V0 -h -b 160 --vbr-new "$i.wav" "$dest"
  rm -f "$i.wav"
fi
done

Running convertomp3 wma will covert every .wma file in the current folder to .mp3.

iFolder 3.8 is out.

Monday, December 7th, 2009

iFolder 3.8 is out. Download it from here http://sourceforge.net/projects/ifolder/files/.

Using Clam AntiVirus to provide real-time protection for your iFolder 3 Server

Sunday, September 13th, 2009

“Because iFolder is a cross-platform distributed solution, there is a possibility of a virus infection on a platform migrating across the iFolder server to other platforms, and vice versa. You should enforce server-based virus scanning to prevent viruses from entering the corporate network.”

This solution applies for openSuSE 11.1 :

The following packages need to be installed :

clamav
dazuko
postfix

Execute modprobe dazuko (as root)

Run lsmod and check that dazuko is loaded:

Edit /etc/init.d/boot.local

  • Add:
    modprobe dazuko

Edit /etc/clamd.conf

Enable logging by activating :
LogFile /var/log/clamd

* Activate:
# Path to a local socket file the daemon will listen on.
LocalSocket /var/lib/clamav/clamd-socket

* Deactivate:
# TCP port address.
#TCPSocket 3310

* Deactivate:
# TCP address.
#TCPAddr 127.0.0.1

* Activate and edit:
# Execute a command when virus is found.
VirusEvent /bin/echo “iFolder VIRUS ALERT: %v” | /bin/mail -s “ClamAV – iFolder” -r ClamAV@server.domain ToUser@domain

* Deactivate:
# Run as a selected user (clamd must be started by root).
#User vscan

Note:
If not deaktivating “User vscan” you receive the error: “clamuko cannot connect to dazuko” in /var/log/clamd

* Clamuko settings, Activate the following :

ClamukoScanOnAccess yes
ClamukoScanOnOpen yes
ClamukoScanOnClose yes
ClamukoScanOnExec yes
ClamukoIncludePath /YOUR_PATH_TO_IFOLDER/ifolder/simias/SimiasFiles

Change any other settings in the file to reflect your needs (see ClamAV documentation).

Start clamd:
/etc/init.d/clamd start

Check that clamd was started without any errors:
tail -f /var/log/clamd

Download the EICAR test signature from:
http://www.f-secure.com/virus-info/eicar_test_file.shtml

Note!
This is not a real virus.

Run: tail -f /var/log/clamd

Save the test file (eicar.zip and/or eicar.com) in your iFolder and wait for sync.

When the virus pattern is detected you should see this (see below) in the log file
/var/log/clamd.

Check that a mail has been sent: tail /var/log/mail

Update ClamAV:
You can update ClamAV using the command: freshclam

A better way is to use the freshclam daemon for automatic updates.

Settings for freshclam: /etc/freshclam.conf

Edit /etc/freshclam.conf

  • Activate:
    # Path to the log file (make sure it has proper permissions)
    UpdateLogFile /var/log/freshclam.log
  • Activate and provide your country code:
    # Uncomment the following line and replace XY with your country code.
    DatabaseMirror db.se.clamav.net
  • Activate and provide update interval (e.g 24 for every hour):
    # Number of database checks per day.
    Checks 24

Create a log file for freshclam:
touch /var/log/freshclam.log

Set file rights:
chown vscan:vscan /var/log/freshclam.log

Start freshclam:
/etc/init.d/freshclam start

Check the log file:
tail /var/log/freshclam.log

Activate automatic start for clamd, freshclam and postfix from Yast –> System –> System Services (Run Level).

Now you have a real-time anti-virus scanning for your iFolder3 server.

Installing iFolder server on openSuSE 11.1

Monday, August 24th, 2009

iFolder is a simple and secure storage solution that can increase your productivity by enabling you to back up, access and manage your personal files-from anywhere, at any time. Once you have installed iFolder, you simply save your files locally-as you have always done-and iFolder automatically updates the files on a network server and delivers them to the other machines you use.

Using iFolder, you can designate any network server as an iFolder server and publish information to a personal iFolder created on that server. Once your folder is established, you can install iFolder on the computers you regularly use and download information from your personal iFolder to any of those computers. Not only that, but using iFolder, you can also invite other iFolder users to share your files in the same safe and secure way so that your teams always have the most relevant copy of a document.

You can download iFolder server for openSuSE 10.3 from this URL : http://www.ifolder.com/download/

But installing iFolder server on openSuSE 11.1 is a bit tedious as mono packages packed with version 11.1 are a bit advanced for iFolder. Find below instructions to help you out :

- Install iFolder server and plugins from this repo.

- Configure apache2 with SSL support.

- Setup by typing as root :

simias-server-setup

ifolder-admin-setup

ifolder-web-setup

in console and follow question given by each command.

- Change folder directory to /etc/apache2/conf.d by cd command and copy all .conf file to /etc/apache2 with cp command on console.

- Start apache service by typing service rcapache2 start in console.

- Allow services http and https in Firewall.

And you’re done.

IMPORTANT :

If you experience the following error code while the client is trying to connect to the server : Authentication Status Code: Unknown. The problem can be solved by NOT choosing the default server data location while running simias-server-setup. I have chosen /home/iFolder instead and that solved my problems. The server will create the folder for you with correct setup and permissions.

I would like to thank http://www.decriptor.com/2009/05/22/ifolder-on-opensuse-11-1/ for helping in creating the repository and making the above information available.


Installing ifolder3 server on openSuSE 10.3

Friday, July 10th, 2009

iFolder is a simple and secure storage solution that can increase your productivity by enabling you to back up, access and manage your personal files-from anywhere, at any time. Once you have installed iFolder, you simply save your files locally-as you have always done-and iFolder automatically updates the files on a network server and delivers them to the other machines you use.

Using iFolder, you can designate any network server as an iFolder server and publish information to a personal iFolder created on that server. Once your folder is established, you can install iFolder on the computers you regularly use and download information from your personal iFolder to any of those computers. Not only that, but using iFolder, you can also invite other iFolder users to share your files in the same safe and secure way so that your teams always have the most relevant copy of a document.

Below are installation instructions for openSuSE 10.3 server :

Download the following packages :

ifolder3 from http://www.kablink.org/index.php

http://ftp.novell.com/pub/mono/download/x86/mono/1.2.6-4/mono-core-1.2.6-4.novell.i586.rpm
http://ftp.novell.com/pub/mono/download/x86/mono/1.2.6-4/mono-data-1.2.6-4.novell.i586.rpm
http://ftp.novell.com/pub/mono/download/x86/mono/1.2.6-4/mono-data-sqlite-1.2.6-4.novell.i586.rpm
http://ftp.novell.com/pub/mono/download/x86/mono/1.2.6-4/mono-web-1.2.6-4.novell.i586.rpm
http://ftp.novell.com/pub/mono/download/x86/mono/1.2.6-4/mono-nunit-1.2.6-4.novell.i586.rpm
http://ftp.novell.com/pub/mono/download/x86/mono/1.2.6-4/mono-winforms-1.2.6-4.novell.i586.rpm
http://ftp.novell.com/pub/mono/download/noarch/xsp/1.2.6-2/xsp-1.2.6-2.novell.noarch.rpm
http://ftp.novell.com/pub/mono/download/suse-103-i586/mod_mono/1.2.6-1/apache2-mod_mono-1.2.6-1.suse103.novell.i586.rpm

Install as following :

rpm -i mono-core-1.2.6-4.novell.i586.rpm
rpm -i mono-data-1.2.6-4.novell.i586.rpm
rpm -i mono-data-sqlite-1.2.6-4.novell.i586.rpm
rpm -i mono-nunit-1.2.6-4.novell.i586.rpm
rpm -i mono-web-1.2.6-4.novell.i586.rpm –nodeps
rpm -i mono-winforms-1.2.6-4.novell.i586.rpm
rpm -i xsp-1.2.6-2.novell.noarch.rpm
rpm -i apache2-mod_mono-1.2.6-1.suse103.novell.i586.rpm

Then install iFolder server.

Vi Cheat Sheet

Thursday, July 2nd, 2009

The VI editor is a screen-based editor used by many Unix users. The VI editor has powerful features to aid programmers, but many beginning users avoid using VI because the different features overwhelm them.

This sheet cheat is aimed to provide beginners with a summary of simple to use everyday commands that should help them master this text editor as soon as possible.

Modes


Vi has two modes insertion mode and command mode. The editor begins in command mode, where the cursor movement and text deletion and pasting occur. Insertion mode begins upon entering an insertion or change command. [ESC] returns the editor to command mode (where you can quit, for example by typing :q!). Most commands execute as soon as you type them except for “colon” commands which execute when you press the ruturn key.

Quitting


: x Exit, saving changes
:q Exit as long as there have been no changes
ZZ Exit and save changes if any have been made
:q! Exit and ignore any changes

Inserting Text


i Insert before cursor
I Insert before line
a Append after cursor
A Append after line
o Open a new line after current line
O Open a new line before current line
r Replace one character
R Replace many characters

Motion


h Move left
j Move down
k Move up
l Move right
w Move to next word
W Move to next blank delimited word
b Move to the beginning of the word
B Move to the beginning of blank delimted word
e Move to the end of the word
E Move to the end of Blank delimited word
( Move a sentance back
) Move a sentance forward
{ Move a paragraph back
} Move a paragraph forward
0 Move to the begining of the line
$ Move to the end of the line
1G Move to the first line of the file
G Move to the last line of the file
nG Move to nth line of the file
:n Move to nth line of the file
fc Move forward to c
Fc Move back to c
H Move to top of screen
M Move to middle of screen
L Move to botton of screen
% Move to associated ( ), { }, [ ]

Deleting Text


Almost all deletion commands are performed by typing d followed by a motion. For example, dw deletes a word. A few other deletes are:
x Delete character to the right of cursor
X Delete character to the left of cursor
D Delete to the end of the line
dd Delete current line
:d Delete current line

Yanking Text


Like deletion, almost all yank commands are performed by typing y followed by a motion. For example, y$ yanks to the end of the line. Two other yank commands are:
yy Yank the current line
:y Yank the current line

Changing text


The change command is a deletion command that leaves the editor in insert mode. It is performed by typing c followed by a motion. For wxample cw changes a word. A few other change commands are:
C Change to the end of the line
cc Change the whole line

Putting text


p Put after the position or after the line
P Put before the poition or before the line

Buffers


Named buffers may be specified before any deletion, change, yank or put command. The general prefix has the form “c where c is any lowercase character. for example, “adw deletes a word into buffer a. It may thereafter be put back into text with an appropriate “ap.

Markers


Named markers may be set on any line in a file. Any lower case letter may be a marker name. Markers may also be used as limits for ranges.
mc Set marker c on this line
`c Go to beginning of marker c line.
c Go to first non-blank character of marker c line.

Search for strings


/string Search forward for string
?string Search back for string
n Search for next instance of string
N Search for previous instance of string

Replace


The search and replace function is accomplished with the :s command. It is commonly used in combination with ranges or the :g command (below).
:s/pattern/string/flags Replace pattern with string according to flags.
g Flag – Replace all occurences of pattern
c Flag – Confirm replaces.
& Repeat last :s command

Regular Expressions


. (dot) Any single character except newline
* zero or more occurances of any character
[...] Any single character specified in the set
[^...] Any single character not specified in the set
^ Anchor – beginning of the line
$ Anchor – end of line
\< Anchor – begining of word
\> Anchor – end of word
\(…\) Grouping – usually used to group conditions
\n Contents of nth grouping
[...] – Set Examples
[A-Z] The SET from Capital A to Capital Z
[a-z] The SET from lowercase a to lowercase z
[0-9] The SET from 0 to 9 (All numerals)
[./=+] The SET containing . (dot), / (slash), =, and +
[-A-F] The SET from Capital A to Capital F and the dash (dashes must be specified first)
[0-9 A-Z] The SET containing all capital letters and digits and a space
[A-Z][a-zA-Z] In the first position, the SET from Capital A to Capital Z
In the second character position, the SET containing all letters
Regular Expression Examples
/Hello/ Matches if the line contains the value Hello
/^TEST$/ Matches if the line contains TEST by itself
/^[a-zA-Z]/ Matches if the line starts with any letter
/^[a-z].*/ Matches if the first character of the line is a-z and there is at least one more of any character following it
/2134$/ Matches if line ends with 2134
/\(21|35\)/ Matches is the line contains 21 or 35
Note the use of ( ) with the pipe symbol to specify the ‘or’ condition
/[0-9]*/ Matches if there are zero or more numbers in the line
/^[^#]/ Matches if the first character is not a # in the line
Notes:
1. Regular expressions are case sensitive
2. Regular expressions are to be used where pattern is specified

Counts


Nearly every command may be preceded by a number that specifies how many times it is to be performed. For example, 5dw will delete 5 words and 3fe will move the cursor forward to the 3rd occurence of the letter e. Even insertions may be repeated conveniently with thismethod, say to insert the same line 100 times.

Ranges


Ranges may precede most “colon” commands and cause them to be executed on a line or lines. For example :3,7d would delete lines 3-7. Ranges are commonly combined with the :s command to perform a replacement on several lines, as with :.,$s/pattern/string/g to make a replacement from the current line to the end of the file.
:n,m Range – Lines n-m
:. Range – Current line
:$ Range – Last line
:’c Range – Marker c
:% Range – All lines in file
:g/pattern/ Range – All lines that contain pattern

Files


:w file Write to file
:r file Read file in after line
:n Go to next file
:p Go to previos file
:e file Edit file
!!program Replace line with output from program

Other


~ Toggle upp and lower case
J Join lines
. Repeat last text-changing command
u Undo last change
U Undo all changes to line


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