Oracle 10g: How to create a log file if lost?

Oracle 10g: How to create a log file if lost?

1 - Now you are facing a problem that the db doesn't open

2 - log on the db as sysdba

sqlplus / as sysdba

3 - alter database clear logfile group (number of the lost group file);

alter database clear logfile group 2;

4 - open the database

alter database open;