Rocky Linux :<\/a><\/strong><\/h4>\n\n\n\nRocky Linux was created as a replacement for CentOS, bringing back the same stability and reliability that CentOS used to offer. It was developed by Gregory Kutzer, one of the original creators of CentOS, to provide a free, enterprise-level Linux system just like RHEL.<\/p>\n\n\n\nSince its release, Rocky Linux has quickly become the best choice for users who needed a secure and stable system. It is widely used in businesses, cloud computing, and data centers because it gets regular updates and long-term support.<\/p>\n\n\n\n
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<\/span>Why is Changing the Hostname Important?<\/span><\/h2>\n\n\n\nThe hostname is the unique name of your computer or server on a network. Changing it is important for better identification, management, and communication between systems. A properly set hostname makes it easier to organize servers, troubleshoot issues, and improve security. Here\u2019s why you should change the hostname in CentOS and Rocky Linux:<\/p>\n\n\n\n\nEasy Server Identification<\/strong> \u2013 A unique hostname helps you quickly recognize each system, especially if you manage multiple servers. Instead of a generic name like localhost.localdomain<\/code>, setting a meaningful hostname like web-server<\/code> or database-server<\/code> makes it clear what each machine is used for.<\/li>\n\n\n\nBetter Network Communication<\/strong> \u2013 A correct hostname allows computers to connect and communicate<\/strong> more easily. When using SSH, remote access, or file sharing<\/strong>, having a proper hostname instead of relying on IP addresses makes networking more efficient.<\/li>\n\n\n\nImproved System Management<\/strong> \u2013 For system administrators<\/strong>, managing and troubleshooting servers becomes easier with the right hostname. When checking logs, running commands, or tracking performance, a meaningful hostname helps avoid confusion.<\/li>\n\n\n\nSecurity & Compliance<\/strong> \u2013 Many businesses have security policies<\/strong> that require proper hostnames for tracking and auditing. A well-named server ensures better monitoring, security enforcement, and compliance<\/strong> with IT policies.<\/li>\n\n\n\nCustomization & Branding<\/strong> \u2013 If you\u2019re using CentOS or Rocky Linux<\/strong> for a company, setting a hostname that follows your naming convention or organizational structure<\/strong> ensures consistency and professionalism.<\/li>\n<\/ul>\n\n\n\n<\/p>\n\n\n\n
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<\/span>Prerequisites to Change Hostname in CentOS and Rocky Linux :<\/span><\/h2>\n\n\n\nBefore you Set Hostname in CentOS and Rocky Linux or Change Hostname in CentOS and Rocky Linux, there are a few things you need to have in place:<\/p>\n\n\n\n\nRoot or Sudo Access<\/strong> \u2013 You need to have root access<\/strong> or be a user with sudo<\/strong> privileges. This is important because changing the hostname requires special permissions.<\/li>\n\n\n\nTerminal Access<\/strong> \u2013 To Set Hostname in CentOS and Rocky Linux, you must be able to access the terminal<\/strong> on your system. If you\u2019re working remotely, you\u2019ll need an SSH connection<\/strong> to the server.<\/li>\n\n\n\nhostnamectl<\/code> Command<\/strong> \u2013 The hostnamectl<\/code><\/strong> command is the easiest way to Change Hostname in CentOS and Rocky Linux. It comes pre-installed on most systems, but if it’s missing, you might need to update your system.<\/li>\n\n\n\nCorrect Hostname Format<\/strong> \u2013 When you Set Hostname in CentOS and Rocky Linux, make sure the new name follows the rules:\n\nIt should be short, clear, and easy to recognize<\/strong> (like web-server<\/code> or db-server<\/code>).<\/li>\n\n\n\nUse only letters, numbers, and hyphens<\/strong>.<\/li>\n\n\n\nAvoid spaces or special symbols.<\/li>\n<\/ul>\n<\/li>\n\n\n\n Network & DNS Considerations<\/strong> \u2013 If your machine is part of a network or domain<\/strong>, make sure the new hostname is added to your DNS records<\/strong> to avoid connection problems.<\/li>\n<\/ul>\n\n\n\nTo Set Hostname in CentOS and Rocky Linux or Change Hostname in CentOS and Rocky Linux, make sure you have root or sudo access<\/strong>, terminal access<\/strong>, and the right format for your hostname. Once you\u2019ve got everything ready, you can easily proceed with updating your system’s identity!<\/p>\n\n\n\n<\/p>\n\n\n\n
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<\/span>Methods to Set or Change Hostname in CentOS and Rocky Linux :<\/span><\/h1>\n\n\n\nThere are different ways to Set Hostname in CentOS and Rocky Linux or Change Hostname in CentOS and Rocky Linux. Below, we\u2019ll walk you through the most common methods:<\/p>\n\n\n\n<\/span>Using hostnamectl<\/code> Command :<\/span><\/h2>\n\n\n\nThe hostnamectl<\/code><\/strong> command is the easiest and most efficient way to Set Hostname in CentOS and Rocky Linux or Change Hostname in CentOS and Rocky Linux. This command is part of the systemd<\/code> package and allows you to manage system hostnames with ease. Here\u2019s how to use it:<\/p>\n\n\n\n<\/p>\n\n\n\n
<\/span>Steps to Set or Change Hostname in CentOS and Rocky Linux Using hostnamectl<\/code>:<\/span><\/h3>\n\n\n\n\nOpen the Terminal :<\/strong>\n\nFirst, open your terminal on your CentOS or Rocky Linux system. If you’re working remotely, connect via SSH.<\/li>\n<\/ul>\n<\/li>\n\n\n\n Use the hostnamectl<\/code> Command<\/strong>\n\nRun the following command to Set or Change Hostname in CentOS and Rocky Linux:\n\nsudo hostnamectl set-hostname new-hostname<\/code><\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\nReplace new-hostname<\/code> with the desired name for your system. For example, if you want to set the hostname to web-server<\/code>, the command would be:\n\nsudo hostnamectl set-hostname web-server<\/code><\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\nVerify the Change :<\/strong>\n\nAfter running the command, you can verify that the hostname has been successfully changed by using:\n\nhostnamectl<\/strong><\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\nThis will show you the current hostname and other related information.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<\/p>\n\n\n\n
The hostnamectl<\/strong><\/code> command is the most straightforward and recommended method to Set Hostname in CentOS and Rocky Linux or Change Hostname in CentOS and Rocky Linux. It\u2019s quick, simple, and doesn\u2019t require manual file editing. Just use the command with sudo privileges and you\u2019re good to go!<\/p>\n\n\n\n<\/p>\n\n\n\n
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<\/span>Editing the \/etc\/hostname<\/code> File :<\/span><\/h2>\n\n\n\nAnother way to Set Hostname in CentOS and Rocky Linux or Change Hostname in CentOS and Rocky Linux is by manually editing the \/etc\/hostname<\/code> file. This method is a bit more direct but still effective. Here\u2019s how you can do it:<\/p>\n\n\n\n<\/p>\n\n\n\n
<\/span>Steps to Edit the \/etc\/hostname<\/code> File:<\/strong><\/span><\/h3>\n\n\n\n\nOpen the Terminal :<\/strong>\n\nOpen a terminal window on your CentOS or Rocky Linux system. If you\u2019re working remotely, connect via SSH.<\/li>\n<\/ul>\n<\/li>\n\n\n\n Edit the \/etc\/hostname<\/code> File :<\/strong>\n\nYou need to open the \/etc\/hostname<\/code> file using a text editor. Here, we’ll use nano<\/code>, but you can use any text editor you’re comfortable with, such as vim<\/code> or vi<\/code>. Run the following command to edit the file:\n\nsudo nano \/etc\/hostname<\/strong><\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\nChange the Hostname :<\/strong>\n\nInside the file, you\u2019ll see the current hostname (e.g., localhost.localdomain<\/code>). Replace this with your new desired hostname. For example, change it to web-server<\/code> or any name that suits your system:\n\nweb-server<\/strong><\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\nSave the File :<\/strong>\n\nAfter changing the hostname, save the file:<\/li>\n\n\n\n In nano<\/code>, press Ctrl + X<\/strong> to exit.<\/li>\n\n\n\nThen press Y<\/strong> to confirm saving the changes, followed by Enter<\/strong> to save the file.<\/li>\n<\/ul>\n<\/li>\n\n\n\nEdit the \/etc\/hosts<\/code> File<\/strong> (Optional but Recommended) :\n\nTo avoid any issues with networking or local resolution, it\u2019s a good idea to update the \/etc\/hosts<\/code> file with your new hostname:<\/li>\n\n\n\nOpen the \/etc\/hosts<\/code> file using a text editor:\n\nsudo nano \/etc\/hosts<\/code><\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\nFind the line that starts with 127.0.0.1<\/code> (localhost) and replace the old hostname with the new one. For example:\n\n127.0.0.1 web-server<\/strong><\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\nSave the file and exit the editor.<\/li>\n<\/ul>\n<\/li>\n\n\n\n Reboot the System :<\/strong>\n\nAfter editing the files, you need to reboot the system for the changes to take effect.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\nEditing the \/etc\/hostname<\/code> file is an effective way to Set Hostname in CentOS and Rocky Linux or Change Hostname in CentOS and Rocky Linux. While it\u2019s a bit more manual than using hostnamectl<\/code>, it still works well for those who prefer direct file editing. Just remember to also update the \/etc\/hosts<\/code> file and reboot for the changes to apply successfully.<\/p>\n\n\n\n<\/p>\n\n\n\n
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<\/span>Using the nmcli<\/code> Command :<\/span><\/h2>\n\n\n\nIf you\u2019re using Network Manager<\/strong> on your CentOS or Rocky Linux system, you can also use the nmcli<\/code><\/strong> command to Set Hostname in CentOS and Rocky Linux or Change Hostname in CentOS and Rocky Linux. This method is useful if Network Manager is managing your network settings.<\/p>\n\n\n\n<\/p>\n\n\n\n
<\/span>Steps to Set or Change Hostname Using nmcli<\/code>:<\/strong><\/span><\/h3>\n\n\n\n
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