Here is some important Graphical User Interface and Text Based interface tool on Linux.
# setup
Authentication Configuration
# authconfig-tui
Keyboard Configuration
# system-config-keyboard
Firewall Configuration
# system-config-securitylevel
# system-config-securitylevel-tui
Network Configuration
# system-control-network
# system-config-network-tui
System Services
# system-config-services
Timezone Configuration
# system-config-time
X Configuration
# system-config-display