Now, i am using Ubuntu 14.04 LTS 64bit. But don`t have mirror for downgrade GDB. (Hanoilug mirror for 32bit only). So i must install GDB 7.8 support python2. First, install lib: 
#sudo apt-get install libncurses5-dev 
#apt-get install python2.7-dev texinfo Extrack gdb tar packet. cd 
#./configure --disable-werror --with-python=python2 
#make
#make install
Then remove, check GDB version (Now ubuntu GDB is 7.7.1). If return 7.8 is ok, if not you can create symlink: 
#cd /usr/bin
#rm -rf gdb
#ln -s /path/to/gdb-7.8/gdb/gdb gdb
Install Peda anh using now :) Update: Now peda supported python3. :)
------------------------------------------------------------ Thanks for reading -------------------------------------------------------------------------- Security Research All my Lab: Linux Lab -- window and Cisco Lab to be continued - I will update more.
Nam Habach


Now, i am using Ubuntu 14.04 LTS 64bit. But don\`t have mirror for downgrade GDB. (Hanoilug mirror for 32bit only).  
So i must install GDB 7.8 support python2.  
First, install lib:  
#sudo apt-get install libncurses5-dev  
#apt-get install python2.7-dev texinfo  
Extrack gdb tar packet. cd  
#./configure --disable-werror --with-python=python2  

#make

#make install

  

Then remove, check GDB version (Now ubuntu GDB is 7.7.1). If return 7.8 is ok, if not you can create symlink: 

#cd /usr/bin

#rm -rf gdb

#ln -s /path/to/gdb-7.8/gdb/gdb gdb

  

Install Peda anh using now :)  
Update: Now peda supported python3. :)

  

\------------------------------------------------------------  
Thanks for reading  
\--------------------------------------------------------------------------  
Security Research  
All my Lab:  
Linux Lab -- window and Cisco Lab  
to be continued - I will update more.

Nam Habach

Install GDB 7.8 support python 2 for PEDA