![]() To view the timestamps of the diagnostic messages, you can run the command below in your terminal: For logging and auditing tasks, it is important to look at the timestamps of the events that take place within your operating system so that you can figure out when a problem occurred. Running this command will display the Linux version on your terminal as shown in the image below:Įxample #5: Viewing Diagnostic Messages with TimestampsĪn event occurs on an operating system at a certain time. If you wish to see your Linux version with the dmesg command, then you can run the following command in your terminal: Along with all the other information, the version of your Linux system was also displayed in that output, but it was difficult to locate. When we ran the dmesg command without any other parameters, the output was too large to view at once. This command will return all the diagnostic messages that have the error level, as shown in the following image:Įxample #4: Viewing the Linux Version with dmesg Command In our example, because we want to view all diagnostic messages of the error level, we replaced LEVEL with err. Here, you need to replace LEVEL with a valid level (e.g., err, warn, info, notice). You can choose to view all the diagnostic messages of a specified severity level as follows:įirst, run the command dmesg –level=LEVEL in your Linux Mint 20 terminal. For example, some messages convey general information, while others contain warnings. The severity levels of diagnostic messages vary depending on the purpose they serve. Once you have read through the first page, you can press the spacebar to move to the next page, and so on, until the last page is reached, as indicated by the END keyword in the following image:Įxample #3: Viewing Diagnostic Messages with a Specific Severity Level You can see the output of the modified dmesg command in the image below. In the command shown below, we are piping the output of the dmesg command to the less command so that diagnostic messages are displayed page by page. which can be done by using the less command in Linux. Therefore, you might want to view these messages page by page. In the previous example, the list of diagnostic messages was very long and impractical to read. You can scroll down to see all the messages, as shown in the image below:Įxample #2: Viewing Diagnostic Messages Page by Page Running this command will display a long list of diagnostic messages on your terminal. Now we will simply run the following command in the terminal: You can see the newly launched terminal in the image below: We can view all types of diagnostic messages at once by performing these steps.įirst, we need to click the shortcut icon of the Linux Mint 20 terminal to launch it. Example #1: Viewing all Diagnostic Messages We will explain the usage of the diagnostic messages command by discussing a few examples. Note: For this tutorial, we used Linux Mint 20 Command Usage #DMESH TUTORIAL HOW TO#This article will teach you how to use this helpful command in Linux. The dmesg command in Linux can be used to display all the messages related to the events taking place within your operating system. Luckily, for the Linux operating system, all these activities are logged in the ring buffer, which can be accessed by using the diagnostic messages (or dmesg) command. Although the user is unaware of these activities, it may be necessary to check these activities to identify operating system issues and the devices attached to the computer system. Every operating system, including Linux, performs some activities silently without notifying the user. ![]()
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