Deploy, configure, and maintain systems

Context: RHCE certification command examples.

Deploy, configure, and maintain systems

Deploying, configuring, and maintaining systems are key skills required for the Red Hat Certified Engineer (RHCE) certification. Here are some command examples that can help you perform these tasks:

  1. Package Management:
  • Install a package using YUM:
sudo yum install package_name
  • Update installed packages:
sudo yum update
  1. Service Management:
  • Start a service:
sudo systemctl start service_name
  • Stop a service:
sudo systemctl stop service_name
  • Enable a service to start at boot:
sudo systemctl enable service_name
  • Disable a service from starting at boot:
sudo systemctl disable service_name
  • Check the status of a service:
sudo systemctl status service_name
  1. User and Group Management:
  • Create a user:
sudo useradd username
  • Set a user's password:
sudo passwd username
  • Create a group:
sudo groupadd group_name
  • Add a user to a group:
sudo usermod -a -G group_name username
  1. File and Directory Management:
  • Create a directory:
mkdir directory_name
  • Create an empty file:
touch file_name
  • Copy a file or directory:
cp source_file destination
  • Move or rename a file or directory:
mv old_name new_name
  • Set file permissions:
chmod permissions file_name
  1. Network Configuration:
  • Configure network interfaces:
sudo nmcli connection modify connection_name ipv4.addresses IP_ADDRESS sudo nmcli connection modify connection_name ipv4.gateway GATEWAY_IP
sudo nmcli connection modify connection_name ipv4.dns DNS_IP
sudo nmcli connection up connection_name
  • Restart the network service:
sudo systemctl restart network
  1. Firewall Management:
  • Add a rule to allow incoming traffic on a specific port:
sudo firewall-cmd --add-port=PORT_NUMBER/tcp
sudo firewall-cmd --permanent --add-port=PORT_NUMBER/tcp
sudo firewall-cmd --reload
  • Check the status of the firewall:
sudo firewall-cmd --state sudo firewall-cmd --list-all

These command examples cover some essential tasks involved in deploying, configuring, and maintaining systems. Remember to adapt the commands based on your specific environment and requirements. Additionally, explore the Red Hat documentation and practice hands-on exercises to gain a deeper understanding of system administration tasks in a Red Hat Enterprise Linux (RHEL) environment.

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