If you want to see which packages can be upgraded, run apt list -upgradable: $ apt list -upgradable Get:6 buster/main armhf Packages ģ packages can be upgraded. If there are updates, you'll see an output similar to this: $ sudo apt-get update In the terminal, enter sudo apt-get update in the command line, enter in your admin password, and press the Enter key. For example, in Ubuntu and Linux Mint, the default terminal is Gnome Terminal, but may be listed under Terminal in the application menu. In your Debian-based Linux distro (Debian, Ubuntu, Linux Mint, Kali Linux, Raspberry Pi OS, and so on), open a terminal window.ĭepending on your distro, the terminal might go by different names depending on how you open it. How to Use the sudo apt-get update Command But just running sudo apt-get upgrade will not automatically upgrade the outdated packages – you'll still have a chance to review the changes and confirm that you want to perform the upgrades. The sudo apt-get upgrade command downloads and installs the updates for each outdated package and dependency on your system. In other words, it'll figure out what the latest version of each package and dependency is, but will not actually download or install any of those updates. The main difference is that sudo apt-get update fetches the latest version of the package list from your distro's software repository, and any third-party repositories you may have configured. What Are the Differences Between sudo apt-get update and sudo apt-get upgrade? In this article, I'll go into what both of these commands do, how to use them, and some frequently asked questions. They're common commands for Linux admins and people doing DevOps, but are handy to know even if you don't use the command line often. Install mail command on Ubuntu/Debian/LinuxMint sudo apt-get install mailutilsĪfter installing mail command packages in your system, send a test email using the below command.Sudo apt-get update and sudo apt-get upgrade are two commands you can use to keep all of your packages up to date in Debian or a Debian-based Linux distribution.Install mail command on Fedora 22+ and CentOS/RHEL 8 sudo dnf install mailx.Install mail command on CentOS/Redhat 7/6 sudo yum install mailx.For RHEL based systems, this command installed from mailx rpm packages and on Debian based system this command found in mailutils package.Įxecute one the following command based on the operating system: Let’s use one of the below commands to install the mail command as per your operating system. There are many other alternatives to mail command for sending emails from Linux command line interface. Most Debian-based systems will show errors like “The program ‘mail’ is currently not installed. mail command is useful for sending emails from the Linux command line which is used for almost Linux operating systems. In minimum operating system installation only required packages are installed for running an operating system and skipped unnecessary packages are. With the minimum installation of any Linux operating system, you will not see most of the commands in your system.
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