LXF182 April 2014

Update from linux mag Apirl 2014.

ReactOS is a free open source OS, but not a Linux or Unix ased. It has been designed to be binary compatible with Windows, letting you run Win app natively.
http://www.reactos.org/


Robolinux
Debian based linux. for people who are new to linux + high level of security. It come with vm for windows xp and 7.
http://www.robolinux.org/


Quirky
A puppy linux come with small size sutable for resurrectin your old PCs.


NAS4Free
A FreeBSD based system that turn your PC to NAS.It come with web interface that easy to manage.
http://www.nas4free.org/

Protecting your privacy (Beat the NSA)
Browsing the web :
* delete cookie
* opt out ad tracking network (networkadvertising.org/choices)
* delete LSO (flash cookie)
* switch to SSL

Cover the track
* use VPN
* use Tor, JonDo
* AdBlock

Email & chat.
* PGP : email client with PGP plugin
* Mailvelope plugin for Web mail service
* cryptoCat plugin for IM

Hardware
* Encrypt drive
* TrueCrypt
* Switch distro such as tails.


Secure Android
* andriod app ask set of permission before installing it.
* use Xposed, XPrivacy to control specific permission
* remove EXIF infor from picutre before sharing or uploading to google drive, dropbox.
* use EncFS on desktop if you use google drive or Dropbox. Store encrypted folder in the cloud instead. This will make all your data on those service encrypted.

Communicate securely
* Phony add-on : customise the use-agent.
* use self-destructing cookies add-on.
* CleanQuit add-on : remove all previos session doloadhistory and site preferences.
* Orweb browser : browse web anonymously, Orbot plugin Tor for andriod.
* Andriod Privacy Guard (APG) : sign and encrypt email with K-9 email app.
* ChatSecure : encrypt IM. use OTR protocol. can be  use to chat securely over facebook or google talk on OTR comptible client like Pidgin.
* TextSecure : encrypted SMS app.
* ReadPhone, SlientPhone : encrypt VOIP.
* OSTN (open source telephony network) standard for end-to-end communication. Such as CSipSimple Acrobits, PrivateGSM, Jitsi.

Secure your device.
* enable lock screen password
*  LockScreen Policy app. Disable all widget on lock screen.
* Screen Locker : lock screen before handing the phone to someone else.
* Privacy Master Free fake a crash to prevent app from launching.
* Encrypt device.



Dr Brown
* i-nex tool : hardware and system info in one place.

Linux Kernel
* what does it do?
* kernel architecture : modular design. can be load or unload.

LXF Hotpick
* devcoin :cryptocurrency
* Octave : computation programming language (like Matlab)
* Brackets : free HTML editor from Adobe


Tutorial 
Pipelight plugin : silverlight for streaming work around
Gentoo : install it
Calibre : Build and ebook sever
Deluge : setup a torrent server (use with Raspberry Pi)

Code Academy
PHP : custom website scraping
OCaml : get started

OpenVPN Server and Client Installation and Configuration on Debian 7

From : http://www.tecmint.com/install-openvpn-in-debian/


OpenVPN is a program that route your internet traffic. You can use visit pages under the firewall which might have some limitation,

Understanding LVM

LVM, Demystified
This article explain what is lvm and how to set it up. Good for beginner.

http://www.linuxjournal.com/content/lvm-demystified?page=0,0

LVM command

This page summarize command for lvm. This is very handy.
http://www.datadisk.co.uk/html_docs/redhat/rh_lvm.htm

continuing svnsync from svn hotcopy

svnsync can be a time-consuming process if your revision is big. In this case, I will show how to continue the svnsync from hotcopy


1. Backup current by hotcopy
- svnadmin hotcopy /svn/repos/repos1/ /tmp/repos1

2. Copy data(/tmp/repos1) to new svn server directory /svn/repos/ (svn repository root) 

3. (optional) Upgrade SVN version property in case new SVN sever is  newer than old SVN server
- svnadmin upgrade

4. Initial SVN property for start svnysnc 
- svn propset --revprop -r0 svn:sync-last-merged-rev revno svn://hostname/reposname/
- svn propset --revprop -r0 svn:sync-from-uuid uuid svn://hostname/reposname/
- svn propset --revprop -r0 svn:sync-from-url svn://oldhost/reposname/ svn://hostname/reposname/

5. Sync data from old repos to new repos
- svnsync --non-interactive sync svn://hostname/reposname/

svnadmin dump, svnadmin load

svnadmin dump, svnadmin load
This sub-command can be use for back up and restore svn repository


Dump repository from SVN server
1. Dump SVN database from SVN server
- svnadmin dump /svn/repos/repos1/ | gzip -9 > /tmp/repos1.dump.gz

2. Copy file repos1.dump.gz for back up 

Restore from dumped repository
3. get svn server installed

4. Import SVN data from dump file with this command
- zcat repos1.dump.gz | svnadmin load /svn/repos/newrepos/

Mirroring svn

Mirror SVN server (and replace master server)

1. Install Mirror SVN server

2. Allow svnsync command permission 
- echo '#!/bin/sh' > /svn/repos/repos1/hooks/pre-revprop-change
- chmod +x /svn/repos/repos1/hooks/pre-revprop-change

3. Initial svnsync configure
- svnsync init svn://mirror/repos1/ svn://original/repos1/

 4. Start sync svn data
- svnsync --non-interactive sync svn://mirror

5. Setup schedule to resync svn
- crontab -e 
*/30 * * * * svnsync --non-interactive sync svn://mirror > /dev/null

- /etc/init.d/cron reload

In case you need mirror replace the master
- svnadmin setuuid /svn/repos/repos1/ uuid

replace   uuid from  /svn/repos/repos1/db/uuid 

svn/subversion server installation

Here are a short note for setting subversion server.

1. Install SVN server (subversion)
- apt-get install subversion

2. Create svnuser account
- useradd -m -s /bin/bash svnuser 

3. Create subversion working directory
- mkdir -p /svn/repos/
- chown svnuser.svnuser -R /svn/
- cd /svn/repos/

4. Change user access to svnuser
- su svnuser

5. Create svm repository
- svnadmin create repos1

6. Config repository password
- vi /svn/repos/repos1/conf/svnserve.conf

#####
anon-access = none
auth-access = write
password-db = passwd
#####

repository password file
- vi /svn/repos/repos1conf/passwd

#username and password example
user1 = pass1

- chmod 600 /home/ddsvn/wwwsvn/conf/passwd

7. Start SVN service

#login to svnuser account

- su svnuser

- svnserver -d -r /svn/repos/

8. Set svn start up on boot with user svnuser

- vi /etc/rc.local

#####

su svnuser -c "svnserve -d -r /svn/repos“

#####