Apache Performance Tuning

http://httpd.apache.org/docs/2.0/misc/perf-tuning.html

Performance Related settings:

EnableMMAP Off // default is ON

MySQL repair all tables

mysqlcheck -u root -p --auto-repair --check --optimize <dbname>

Mysql replication: purging binary logs

It is recommended to purge or recycle the master/slave db binary logs on a daily or weekly basis

Here is the command:

purge binary logs before '2012-05-01';

http://dev.mysql.com/doc/refman/5.0/en/purge-binary-logs.html

Bandwidth Monitor Linux tools

Good command line tools:
bwm
bwm-ng
iftop

Useful links:
http://www.ubuntugeek.com/bandwidth-monitoring-tools-for-linux.html