Basically the files ib_logfile0,ib_logfile1 contains the databse table structure and responsible for identifying the path for database connection. You will be able to find all the databases in /var/lib/mysql but all the tables using innoDB database engine are corrupted and will show the database connection error, because of removal of ib_logfile0,ib_logfile1.
Therefore you have to recover table structure from .frm files with MySQL Utilities
I am sharing one link rest you have to find.
Other way is backup your all databases and try to recover it with force recovery.
and add beow line in your mysql configuration file
innodb_force_recovery = 1
now, start the mysql service.
Under the mysqld section of the config file you can add innodb_force_recovery = 0 – 6.
Levels 1-4 are pretty safe as most data is preserved. Setting the level to 5 or 6 gets a bit more risky as you could lose some data.
Wish you LUCK.