If you’ve done a Basic/Minimal OS install on RHEL/CentOS Linux, setuptool (which could be invoked typing “setup” in terminal), this tool is probably missing on your system.
To install it via Yum repository, simply type the following command :
yum install setuptool system-config-securitylevel-tui authconfig system-config-network-tui ntsysv
There is a description of each packages :
setuptool : text setup tool console
system-config-securitylevel-tui : for configuring the firewall
authconfig : for configuring authentication
system-config-network-tui : for configuring the network
ntsysv : for configuring the system services