Need a baseline configuration for MySQL 4.x or 5.x? Look no further:
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
#old_passwords=1
skip-locking
key_buffer = 64M
max_allowed_packet = 16M
table_cache = 2048
sort_buffer_size = 1M
read_buffer_size = 1M
read_rnd_buffer_size = 8M
myisam_sort_buffer_size = 64M
thread_cache_size = 16
query_cache_size = 32M
thread_concurrency = 8
tmp_table_size=64M
back_log = 100
max_connect_errors = 10000
join_buffer_size=1M
[mysql.server]
user=mysql
basedir=/var/lib
[mysqld_safe]
err-log=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
open_files_limit=65536
