From the course: Linux Foundation Certified System Administrator (LFCS) Cert Prep
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Boot or change system into different operating modes (optional) - Linux Tutorial
From the course: Linux Foundation Certified System Administrator (LFCS) Cert Prep
Boot or change system into different operating modes (optional)
- [Instructor] Currently, our Linux operating system boots to this login screen. Now, tens of programs need to be loaded, some of them in a very specific order so that we can get to this screen. Now, how does Linux know how to do this? With the help of what are called System D target. When the operating system boots up, it takes a look at what the default system D target is, and we can check for ourselves what target is currently set as default with this command, systemctl get-default. The name graphical.target suggests that the operating system is configured to boot into a graphical environment. The file graphical.target contains instructions about what needs to happen to arrive at this target. By reading this, the operating system knows what programs it needs to launch in what order to boot this target. Booting into a graphical target is pretty demanding. If we don't need our operating system to load up a graphical user interface, we can change the default boot target. We can type…
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Contents
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(Locked)
Boot, reboot, and shutdown a system safely3m 12s
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(Locked)
Boot or change system into different operating modes (optional)3m 38s
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(Locked)
Use scripting to automate system maintenance tasks11m 42s
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Manage startup process and services11m 32s
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Create systemd services15m 21s
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(Locked)
Diagnose and manage processes21m 48s
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Locate and analyze system log files10m 52s
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Schedule tasks to run at a set date and time13m 27s
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Manage software with package manager5m 48s
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Configure the repositories of package manager9m 37s
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Install software by compiling source code6m 54s
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Verify integrity and availability of resources and processes10m 28s
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Change kernel runtime parameters, both persistent and non-persistent5m 46s
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List and identify SELinux file and process contexts9m 1s
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Create and enforce MAC using SELinux27m 42s
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Create and manage containers22m 51s
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Manage and configure virtual machines8m 35s
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Create and boot a virtual machine16m 29s
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(Locked)
Installing an operating system on a virtual machine4m 5s
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(Locked)
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