What is the best open source software to set up log server in Linux ? It is better to have the function to let admin to customize the module, eg I want to add a new item for a specific log (eg, crontab log or some other application logs), or I can sort the log form the web portal according to the services, hosts, ports.
PS: sorry for any confusion and thanks for the prompt reply. What I want is :
1) the software has web portal as a dashboard to check all the logs collected. 2）the software can be customised manually to meet the requirement, eg we can add a item for a specified service like our own application or something else.