Unable to start mysqld service after enabling log_bin

Hi I am unable to start mysqld service after I make changes in my.cnf to enable log-bin. After making changes the file looks like below: # For advice on how to change settings please see # http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html [mysqld] # # Remove leading # and set to the amount of RAM for the most important data # cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%. # innodb_buffer_pool_size = 128M # # Remove leading # to turn on a very important data integrity option: logging # changes to the binary log between backups. # log_bin #This is what I added to enable log-bin log-bin=/var/log/mysql/ log-bin-index=bin-log.index max_binlog_size=100M binlog_format=row socket=mysql.sock #That was what I added to enable log-bin # # Remove leading # to set options mainly useful for reporting servers. # The server defaults are faster for transactions and fast SELECTs. # Adjust sizes as needed, experiment to find the optimal values. # join_buffer_size = 128M # sort_buffer_size = 2M # read_rnd_buffer_size = 2M datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock # Disabling symbolic-links is recommended to prevent assorted security risks symbolic-links=0 log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid I am using: [ec2-user@pip my.cnf.d]$ cat /etc/redhat-release Red Hat Enterprise Linux Server release 7.3 (Maipo) Following is the ownership and permissions: d]$ ls -ld /var/log/mysql drwxrwxrwx. 2 mysql mysql 23 Sep 8 09:01 /var/log/mysql Following is the error that I get: [ec2-user@i.d]$ sudo service mysqld start Redirecting to /bin/systemctl start mysqld.service Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details. MySQL version is: Server version: 5.7.19 MySQL Community Server (GPL) Please let me know if any other detail is required