Problem:
InnoDB: Unable to lock ./ibdata1
Solution:
cd /var/lib/mysql/
mv ibdata1 ibdata1.bak
cp -a ibdata1.bak ibdata1
mv ibdata1 ibdata1.bak
cp -a ibdata1.bak ibdata
Problem:
InnoDB: Unable to lock ./ibdata1
Solution:
cd /var/lib/mysql/
mv ibdata1 ibdata1.bak
cp -a ibdata1.bak ibdata1