/var/log/daemon.log taking more space how to reduc

问题:

below are the files

-rw-r----- 1 root        adm  4.4G Mar  6 09:04 daemon.log
-rw-r----- 1 root        adm  6.2G Mar  1 06:26 daemon.log.1
-rw-r----- 1 root        adm   50M Feb 23 06:26 daemon.log.2.gz
-rw-r----- 1 root        adm   41M Feb 17 06:25 daemon.log.3.gz
-rw-r----- 1 root        adm   72K Feb  9 06:25 daemon.log.4.gz

how can I remove it? will it affect if I directly delete it?

Thanks in advance.