Admins eHow SysAdmin Tips & Tricks

November 6, 2013

Installing rtorrent+rutorrent on Debian 7 Wheezy

Filed under: General — admin @ 4:00 am

Here is a simple guide on how to install rtorrent/rutorrent on Debian 7 Wheezy , It may also work on Ubuntu and other Debian based Linux distros.

Install prerequisite packages :

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apt-get install gcc pkg-config libssl-dev g++ make libncurses5-dev libsigc++-2.0-dev libcurl4-openssl-dev subversion screen nano

Install XMLRPC-C , it is required for rutorrent communication with rtorrent :

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svn co http://svn.code.sf.net/p/xmlrpc-c/code/advanced xmlrpc-c
cd xmlrpc-c
./configure
make
make install

Install LibTorrent required by rtorrent :

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wget http://libtorrent.rakshasa.no/downloads/libtorrent-0.13.3.tar.gz
tar zxvf libtorrent-0.13.3.tar.gz
cd libtorrent-0.13.3
./configure
make
make install

Install rtorrent client :

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wget http://libtorrent.rakshasa.no/downloads/rtorrent-0.9.3.tar.gz
tar zxvf rtorrent-0.9.3.tar.gz
cd rtorrent-0.9.3
./configure --with-xmlrpc-c
make
make install
ldconfig

Now, we have to make a user for rtorrent and configure it :

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useradd user1
mkdir -p /home/user1/rtorrent
mkdir -p /home/user1/rtorrent/.session
mkdir -p /home/user1/rtorrent/download
chown -R user1:user1 /home/user1

Copy rtorrent sample config from rtorrent source directory to user1 home directory :

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cp rtorrent-0.9.3/doc/rtorrent.rc /home/user1/.rtorrent.rc

Now you can customize the configuration :

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nano /home/user1/.rtorrent.rc

But what you need to customize are following options :

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directory = /home/user1/rtorrent/download
session = /home/user1/rtorrent/.session
scgi_port = localhost:5000

It is time to run rtorrent, This command runs rtorrent as user1 :

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su - user1 -c 'screen -fa -d -m rtorrent'

Now we can install Apache + php5 which is required by rutorrent :

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apt-get install libapache2-mod-php5

Enable auth_digest module which is required for rutorrent authentication :

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a2enmod auth_digest

Install rutorrent+pluins :

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wget http://dl.bintray.com/novik65/generic/rutorrent-3.6.tar.gz
tar zxvf rutorrent-3.6.tar.gz
mv rutorrent /var/www
 
wget http://dl.bintray.com/novik65/generic/plugins-3.6.tar.gz
tar zxvf plugins-3.6.tar.gz
mv plugins /var/www/rutorrent/

Tip : The only plugin which you need is httprpc. you can disable or delete all the rest.

Configure user1 on rutorrent :

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mkdir -p /var/www/rutorrent/conf/users/user1
cp /var/www/rutorrent/conf/config.php /var/www/rutorrent/conf/users/user1
nano /var/www/rutorrent/conf/users/user1/config.php

Make sure $scgi_port in config.php matches scgi_port in rtorrent config file :

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$scgi_port = 5000;

For rutorrent web authentication create .htaccess file in rutorrent directory :

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nano /var/www/rutorrent/.htaccess

Copy and paste the following inside .htaccess :

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AuthName "Restricted Area"
AuthType Basic
AuthUserFile /etc/.htpasswd
AuthGroupFile /dev/null
require valid-user

Create password file for Apache :

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htdigest -c /etc/.htpasswd "Restricted Area" user1

Now we need to configure Apache to allow .htaccess override :

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nano /etc/apache2/sites-enabled/000-default

Change :

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<Directory /var/www/>
    Options Indexes FollowSymLinks MultiViews
    AllowOverride None
    Order allow,deny
    allow from all
</Directory>

To :

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<Directory /var/www/>
    Options Indexes FollowSymLinks MultiViews
    AllowOverride All
    Order allow,deny
    allow from all
</Directory>

And finally restart apache :

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/etc/init.d/apache2 restart

Now you should be able to access your rtorrent/rutorrent on this address : http://IP_SERVER/rutorrent

October 12, 2012

How to install transmission 2.71 on Debian 6.0 Squeeze

Filed under: General — admin @ 6:41 am

Installing transmission 2.71 on Debian 6 is a little tricky and is not as straight forward as installing by apt-get.
Here is how you can do it.

First you need to manually install libevent 2.0 :

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apt-get install make gcc
wget https://github.com/downloads/libevent/libevent/libevent-2.0.20-stable.tar.gz
tar zxvf libevent-2.0.20-stable.tar.gz
cd libevent-2.0.20-stable
./configure
make
make install

then some prerequisite packages for later installation :

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apt-get install libssl-dev pkg-config libcurl4-openssl-dev intltool tar bzip2

now it is time to download and configure transmission :

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wget http://download.transmissionbt.com/files/transmission-2.71.tar.bz2
tar jxvf transmission-2.71.tar.bz2
cd transmission-2.71
./configure --enable-lightweight --enable-daemon

now if you try to compile (make) the package you will get the following error :

tr-utp.c:65: error: conflicting types for ‘UTP_Write’
../third-party/libutp/utp.h:116: note: previous declaration of ‘UTP_Write’ was here
make[1]: *** [tr-utp.o] Error 1
make[1]: Leaving directory `/root/transmission-2.71/libtransmission’
make: *** [all-recursive] Error 1

in order to fix this error open this file in transmission directory :

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nano ./third-party/libutp/utypes.h

and comment following lines :

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// #ifndef __cplusplus
// typedef uint8 bool;
// #endif

and add following line just after above lines :

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#ifndef __cplusplus
#ifdef HAVE_STDBOOL_H
#include <stdbool.h>
#else
typedef uint8 bool;
#endif
#endif

save file and exit. return to transmission root directory and make and install.

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make
make install

April 17, 2012

How to create a mirror of a site using wget

Filed under: General,linux — Tags: , , , — admin @ 7:33 am

First you need to make sure you have the latest version of wget, some distros are still being released with older versions of wget which has some bugs regarding mirroring functionality. currently the latest version is 1.13.4, so if you don’t have the latest version, you can download and build it from following link :

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ftp://ftp.gnu.org/gnu/wget/

after building the wget, make sure the latest version is being used :

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wget -V

output :

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GNU Wget 1.13.4 built on linux-gnu.
 
+digest +https +ipv6 -iri +large-file +nls -ntlm +opie +ssl/gnutls
 
Wgetrc:
    /usr/local/etc/wgetrc (system)
Locale: /usr/local/share/locale
Compile: gcc -DHAVE_CONFIG_H -DSYSTEM_WGETRC="/usr/local/etc/wgetrc"
    -DLOCALEDIR="/usr/local/share/locale" -I. -I../lib -I../lib -O2
    -Wall
Link: gcc -O2 -Wall -lgnutls -lgcrypt -lgpg-error -lz -lrt ftp-opie.o
    gnutls.o ../lib/libgnu.a
 
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://www.gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
 
Originally written by Hrvoje Niksic <hniksic@xemacs.org>.
Please send bug reports and questions to <bug-wget@gnu.org>.

OK, you are good to go now, just execute the following command and relax 🙂

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wget -mkp -e robots=off http://site

April 11, 2012

My favorite smartphone wallpapers

Filed under: Android,General — Tags: , , , , , — admin @ 6:36 pm

These are my favorite wallpapers on my SGSII, I hope you enjoy them 🙂

You can download them here : SGSII-Wallpapers

March 19, 2012

Simple Timer Utility

Filed under: General — Tags: , , , , — admin @ 6:15 pm

This is another utility which I wrote for myself use, it is a simple countdown timer which beeps when it reaches zero.
You can download it here : Timer

February 26, 2012

How to update Adaptec raid driver on Centos & RHEL5

Filed under: CentOS,General — Tags: , , , , , , , — admin @ 6:51 pm

Download the driver RPMs from adaptec website, as I have 5805z controller, I downloaded the drivers from here :

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http://www.adaptec.com/en-us/support/raid/sas_raid/sas-5805z
http://www.adaptec.com/en-us/downloads/rh/rhel_5/productid=sas-5805z&dn=adaptec+raid+5805z.html

You will get a file like this :

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aacraid_linux_rpms_v1.1.7-28700.tgz

unpack it :

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tar zxvf aacraid_linux_rpms_v1.1.7-28700.tgz

to get :

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aacraid-1.1.7-28700.rpm

install rpm :

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rpm -ivh --force aacraid-1.1.7-28700.rpm

it will only extract the files to /opt/Adaptec/aacraid :

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cd /opt/Adaptec/aacraid
mkdir mods
mv aacraid_prebuilt.tgz mods
cd mods
tar zxvf aacraid_prebuilt.tgz
rm *.tgz

now you have prebuilt module for different kernels, copy the appropriate kernel module to aacraid.ko path, a command like :

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cp aacraid-2.6.18-238.el5xen-x86_64 /lib/modules/2.6.18-274.18.1.el5xen/kernel/drivers/scsi/aacraid/aacraid.ko

if you have locate package installed, you can easy find all aacraid.ko files :

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locate aacraid.ko | xargs -n1 modinfo | grep vers

when it is complete, reboot the server.

January 11, 2012

Fix nginx 502 Bad Gateway error

Filed under: General — Tags: , , , , — admin @ 11:01 am

Today I was getting “502 Bad Gateway” on a Glype proxy installation , after digging into the problem I found out it is a problem of nginx fastcgi buffers , here is how to fix it :
open /etc/nginx/nginx.conf
add the following lines into http section :

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fastcgi_buffers 8 16k;
fastcgi_buffer_size 32k;

you config should look like this :

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http {
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fastcgi_buffers 8 16k;
fastcgi_buffer_size 32k;
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}

restart nginx and fastcgi.

December 16, 2011

Linux Delete Empty Directories (Folders)

Filed under: CentOS,Debian,General,linux — Tags: , , , , , , — admin @ 6:01 am

As simple as one single command :

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find -type d -empty -delete

September 26, 2011

Gateway on a different subnet on Linux

Filed under: Debian,General,linux — Tags: , , , , , — admin @ 7:50 am

Theoretically host IP and gateway should be on the same IP subnet. but there are some situations where host IP and gateway subnet are on different subnets. like my situation today. I was assigned two additional IPs for my server by my Data-center, but IPs were from a different subnet compared to server main IP. these IPs will work if you set them as additional IPs. but I needed them to create two new VPS’s on my server with bridged network interface. in this situation additional IPs should serve as main IP address and there is no gateway on same subnet available.
So here are the assumptions :

a.b.c.d is the host IP
e.f.g.h is the gateway IP
a.b.c.d & e.f.g.h are on different subnets.

by default if you try to set gateway by following command :

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route add default gw e.f.g.h

you will get this error :

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SIOCADDRT: No such process

the trick is simple , first add a route to default gateway itself and then set the default gateway , like this :

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route add e.f.g.h/32 dev eth0
route add default gw e.f.g.h

remember you may need to change eth0 to your device name , it may be eth1 or wlan0 or anything.

How to make these route changes persistent ?

For Debian/Ubuntu :
Add the following lines to /etc/network/interfaces :

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post-up route add e.f.g.h/32 dev eth0
post-up route add default gw e.f.g.h

September 19, 2011

Steve Jobs’ 2005 Stanford Commencement Address – Must See

Filed under: Apple,General — Tags: , , — admin @ 8:25 pm

If you read my blog , you will know that I am not a fan of Apple. In fact I fight against its dominance and its policies.but I really admire this man, Steve Jobs. He deserves what he has acquired.
I recommend everyone to listen to this speech very carefully several times and make use of advises of this man. What he says and recommends in life is very true and useful.

Watch here :
Steve Jobs' 2005 Stanford Commencement Address

The text of speech :
‘You’ve got to find what you love,’ Jobs says

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