CentOS 7 firewall-cmd not found

Solution 1:

Two possible options

• Your PATH does not contain /usr/bin
• firewall-cmd is not installed
  • yum install firewalld

Solution 2:

Looks to me like you don't have it installed/enabled.

yum install firewalld
systemctl unmask firewalld
systemctl enable firewalld
systemctl start firewalld