Embracing open source, practical experience in Linux system privilege escalation revealed

As a senior system administrator, I often deal with various types of operating systems at work. Among them, Linux, an excellent open source operating system, has become my first choice and close partner. Today, I would like to share with you some practical experience in using Linux to increase execution permissions.

Next, we will provide you with a detailed analysis of related topics on how to grant corresponding permissions to executable files in the Linux system.

1.What is execution permission

2. Use the chmod command to add execution permissions to the file

3. Use the chown command to change the file owner and group

4. Use the chgrp command to change the group to which the file belongs

5. How to check the execution permission of a file

6. Add execution permissions to the directory

7. Use special permissions to improve file execution security

1.What is execution permission

In the Linux operating system, each document has the three basic permissions of reading, editing and executing. The "Execute" permission represents your right to use and run the article. Without this permission, it will be difficult to start or load this file by specifying commands.

2. Use the chmod command to add execution permissions to the file

If you want to authorize operations on a certain document, you can use the chmod command to complete the task! For example, if you want to set the script file named "script.sh" to an executable statelinux add execution permission, is it OK to enter the following command with just a finger?

```

chmod x script.sh

In this way, the file "script.sh" is given executable permissions.

3. Use the chown command to change the file owner and group

If you need to modify the file owner and team, you can consider using the `chown` command to achieve this. For example, if you want to change the owner of `script.sh` to the root user, just refer to the following steps:

chown root script.sh

With this command, we can manage file ownership more flexibly.

4. Use the chgrp command to change the group to which the file belongs

Smartly change the owner and group of files to easily adjust their ownership. This can be accomplished using the simple and easy chgrp command. For example, for embedded Linux training, if you want to put the "script.sh" file into the "admin" group Linux environment configuration, just enter the following command:

chgrp admin script.sh

With this command, we can better control file access permissions.

5. How to check the execution permission of a file

In the Linux environment, you can use the ls command to view file information. If you choose the -l parameter, you can quickly obtain the authorization information of each file! As shown in the example:

ls -l script.sh

Please check the permission details of the "script.sh" file, including execution rights information.

6. Add execution permissions to the directory

When authorizing documents to perform operations, we may consider granting permissions to the corresponding directories? You only need to simply enter the "chmod" command to achieve this small goal. For example, linux adds execution permissions, if we have a directory called "mydir" and want everyone to access it, you can try saying this:

chmod x mydir

In this way, users can enter the directory through the cd command.

7. Use special permissions to improve file execution security

In the Linux operating system, in order to ensure file access security, you should pay attention to and utilize two special permissions: SUID and SGID. SUID allows users to execute related programs as the file owner; SGID allows users to run files as the name of the group to which they belong. You can easily set these two special permissions with a short chmod command!

Following the above seven steps for configuration can make the Linux system without assigned user rights more robust. We deeply feel the power and flexibility of Linux, and hope this article can help you. Let’s appreciate the unique charm of Linux together!

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