How to install KeePass2 on Lubuntu

E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?
sudo rm /var/lib/dpkg/lock


E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem. 
sudo dpkg --configure -a


dpkg: error: parsing file '/var/lib/dpkg/updates/0028' near line 0:
 newline in field name '#padding'
cd /var/lib/dpkg/updates && sudo rm -rf 0028


sudo apt-get install keepass2

How to install keepassx-0.4.3 on lubuntu-12.04-desktop-i386

sudo apt-get install libxtst-dev build-essential libqt4-dev qt4-qmake
wget http://downloads.sourceforge.net/keepassx/keepassx-0.4.3.tar.gz
tar -zxvf keepassx-0.4.3.tar.gz
cd keepassx-0.4.3/
qmake-qt4
make
sudo make install
rm keepassx-0.4.3.tar.gz 
rm -r keepassx-0.4.3
/usr/bin/keepassx