Tried out writing a python snipped to post instant messages whenever a motion is detected by Ubuntu 9.10. I will post in details about the whole recipe latter. However important fact is, its its much much faster then using Twitter!
Sunday, February 28, 2010
Friday, February 19, 2010
django and threading :)
Figured out how to deal threading on django! While there are quite great many argument's and counter arguments, I believe its going to be a great if it doesn't break anything :)
A drop in for the threading:
http://github.com/jaylett/django_concurrent_test_server
Also a proxying solution using django:
http://pypi.python.org/pypi/django-http-proxy/
Looks like I am all set with a desired proxy server :)
A drop in for the threading:
http://github.com/jaylett/django_concurrent_test_server
Also a proxying solution using django:
http://pypi.python.org/pypi/django-http-proxy/
Looks like I am all set with a desired proxy server :)
Saturday, February 6, 2010
SSH Chrooting on Ubuntu 9.10
SSH Configuration Section:
First thing first, setup sshd so that it allows chroot for a given user as following:
Match User jazz
ChrootDirectory /home/jazz
AllowTCPForwarding yes
X11Forwarding no
Next, make sure the directory /home/jazz is owned explicitly on root and no one else:
chown -R root:root /home/jazz
Next execute following:
cd /home/jazz
mkdir etc
mkdir bin
mkdir lib
mkdir usr
mkdir usr/bin
mkdir dev
mknod dev/null c 1 3
mknod dev/zero c 1 5
Execute following:
APPS="/bin/bash /bin/ls"
for prog in $APPS; do
cp $prog ./$prog
# obtain a list of related libraries
ldd $prog > /dev/null
if [ "$?" = 0 ] ; then
LIBS=`ldd $prog | awk '{ print $3 }'`
for l in $LIBS; do
mkdir -p ./`dirname $l` > /dev/null 2>&1
cp $l ./$l
done
fi
done
Please note apps above can be modified as per needed binaries. In a nutshell all the libraries on which binaries depend must be copied to lib, even those libraries depending on libraries must be copied.
Finally copy library as following:
cp /lib/ld-linux.so.2 lib
If you would like to share files between chroot and otherwise use following:
mount --bind /home/ubuntu/Downloads /home/jazz/Downloads
Ofcourse /home/jazz/Downloads must exist!
There chroot should work!
First thing first, setup sshd so that it allows chroot for a given user as following:
Match User jazz
ChrootDirectory /home/jazz
AllowTCPForwarding yes
X11Forwarding no
Next, make sure the directory /home/jazz is owned explicitly on root and no one else:
chown -R root:root /home/jazz
Next execute following:
cd /home/jazz
mkdir etc
mkdir bin
mkdir lib
mkdir usr
mkdir usr/bin
mkdir dev
mknod dev/null c 1 3
mknod dev/zero c 1 5
Execute following:
APPS="/bin/bash /bin/ls"
for prog in $APPS; do
cp $prog ./$prog
# obtain a list of related libraries
ldd $prog > /dev/null
if [ "$?" = 0 ] ; then
LIBS=`ldd $prog | awk '{ print $3 }'`
for l in $LIBS; do
mkdir -p ./`dirname $l` > /dev/null 2>&1
cp $l ./$l
done
fi
done
Please note apps above can be modified as per needed binaries. In a nutshell all the libraries on which binaries depend must be copied to lib, even those libraries depending on libraries must be copied.
Finally copy library as following:
cp /lib/ld-linux.so.2 lib
If you would like to share files between chroot and otherwise use following:
mount --bind /home/ubuntu/Downloads /home/jazz/Downloads
Ofcourse /home/jazz/Downloads must exist!
There chroot should work!
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