Delete mysql-bin.**** files from /var/log/mysql

Question

In the /var/log/mysql I found that are many large files

-rw-rw----  1 mysql adm  104875724 Nov 16  2016 mysql-bin.002982
    -rw-rw----  1 mysql adm  104900467 Nov 16  2016 mysql-bin.002983
 ...............
    -rw-rw----  1 mysql adm  104919093 Nov 23  2016 mysql-bin.003118
    -rw-rw----  1 mysql adm  104857817 Nov 23  2016 mysql-bin.003119
    -rw-rw----  1 mysql adm  104858056 Nov 23  2016 mysql-bin.003120
    -rw-rw----  1 mysql adm    9184221 Nov 23  2016 mysql-bin.003121
    -rw-rw----  1 mysql adm  104907549 Nov 23  2016 mysql-bin.003122
 ......
    -rw-rw----  1 mysql adm       6272 Nov 25  2016 mysql-bin.index

Can I delete them?

Update

I don't use a replication for the database

Answer 1

better not do it manually, you can do it through mysql.

PURGE BINARY LOGS TO 'binlogname';
PURGE BINARY LOGS BEFORE 'datetimestamp';`

for example to delete everything before a week ago run:

PURGE BINARY LOGS BEFORE DATE(NOW() - INTERVAL 3 DAY) + INTERVAL 0 SECOND;

or (even better) edit the my.cnf and set this parameter

[mysqld]
expire_logs_days=7