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This article focuses on "how to lock a virtual console session on Linux". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor learn how to lock a virtual console session on Linux.

When you are working on a shared system, you may not want other users to peek into your console to see what you are doing. If so, I know that there is a simple technique for locking my own session while still allowing other users to use the system on other virtual consoles. Thanks to Vlock (Virtual Console lock), a command line program that locks one or more sessions on the Linux console. If necessary, you can lock the entire console and completely disable the virtual console switching feature. Vlock is particularly useful for shared Linux systems with multiple users accessing the console.

Install Vlock

On Arch-based systems, the Vlock package is replaced with the default preinstalled kpd package, so you don't have to worry about installation.

On Debian, Ubuntu, Linux Mint, run the following command to install Vlock:

$sudo apt-get install vlock

On Fedora:

$sudo dnf install vlock

On RHEL, CentOS:

$sudo yum install vlock locks the virtual console session on Linux

The general syntax of Vlock is:

Vlock [- acnshv] [- t] [plugins... ]

Here:

A-Lock all virtual console sessions

C-Lock the current virtual console session

N-switch to the new empty console before locking all sessions

S-disable the SysRq key mechanism

T-specify the timeout of the screensaver plug-in

H-Show help

V-displays the version.

Let me give you a few examples.

1. Lock the current console session

When Vlock is run without any parameters, it locks the current console session (TYY) by default. To unlock the session, you need to enter the current user's password or root password.

$vlock

You can also use the-c flag to lock the current console session.

$vlock-c

Note that this command locks only the current console. You can press ALT+F2 to switch to another console. For more details on switching between TTY, see the following guidelines.

In addition, if the system has multiple users, other users can still access their respective TTY.

2. Lock all console sessions

To lock all TTY at the same time and disable the virtual console switching feature, run:

$vlock-a

Similarly, to unlock the console session, simply press enter and enter the current user's password or root password.

Keep in mind that root users can unlock any vlock session at any time unless disabled at compile time.

3. Switch to the new virtual console before locking all consoles

You can also switch Vlock from an X session to a new virtual console before locking all consoles. To do this, use the-n flag.

$vlock-n4, disable the SysRq mechanism

As you may know, the magic SysRq key mechanism allows users to perform certain actions when the system crashes. Therefore, users can use SysRq to unlock the console. To prevent this, pass the-s option to disable the SysRq mechanism. Keep in mind that this option only applies when you have the-an option.

$vlock-sa

For more options and their usage, see the help or man pages.

$vlock-h $man vlock

Vlock prevents unauthorized users from gaining access to the console. If you are looking for a simple console locking mechanism for Linux, then Vlock is worth a try!

At this point, I believe you have a deeper understanding of "how to lock a virtual console session on Linux". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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