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  • How to get telnet working on CentOS/RHEL and MacOS?

    telnet is not available by default on a higher version of CentOS/RHEL and MacOS. But that doesn’t mean you can’t get it installed.

    When you run telnet, you will notice the following error.

    [[email protected] ~]# telnet
    -bash: telnet: command not found
    [[email protected] ~]#

    To fix this, you need to install telnet and it’s easy.

    Installing telnet on CentOS/RHEL

    • Log in to the server as root
    • Run the below command to install
    yum -y install telnet

    You can also use DNF if using CentOS 8.

    dnf -y install telnet

    It’ll download the package and install and show you the complete confirmation below.

    Downloading packages:
    telnet-0.17-64.el7.x86_64.rpm                                                                                                              |  64 kB  00:00:00     
    Running transaction check
    Running transaction test
    Transaction test succeeded
    Running transaction
      Installing : 1:telnet-0.17-64.el7.x86_64                                                                                                                    1/1 
      Verifying  : 1:telnet-0.17-64.el7.x86_64                                                                                                                    1/1 
    
    Installed:
      telnet.x86_64 1:0.17-64.el7                                                                                                                                     
    
    Complete!

    Now, you can run telnet

    [[email protected] ~]# telnet
    telnet>

    Have fun!

    Installing telnet on MacOS

    To install telnet on MacOS, you need to have/install Homebrew.

    • Launch terminal and run the below command to install Homebrew (skip if you already have)
    /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
    • It will take a few seconds and once done; you will see the success message.
    Cloning into '/usr/local/Homebrew/Library/Taps/homebrew/homebrew-core'...
    remote: Enumerating objects: 4947, done.
    remote: Counting objects: 100% (4947/4947), done.
    remote: Compressing objects: 100% (4748/4748), done.
    remote: Total 4947 (delta 49), reused 337 (delta 7), pack-reused 0
    Receiving objects: 100% (4947/4947), 3.99 MiB | 3.17 MiB/s, done.
    Resolving deltas: 100% (49/49), done.
    Tapped 2 commands and 4731 formulae (4,989 files, 12.4MB).
    Already up-to-date.
    ==> Installation successful!

    Great, its time to install telnet using brew command

    brew install telnet
    • It will download and install the necessary package. Once done, rerun the telnet.
    Chandans-iMac:~ chandan$ telnet
    telnet>

    It was easy. Isn’t it?

    Want to build a career in Sysadmin? Check out this Linux administration online course.