CentOS package installation and passwordless installation tips

In Linux systems, CentOS is a very popular distribution. It is based on Red Hat Enterprise Linux (RHEL) and simplifies it. In CentOS, package management is an important part of system management. This article will introduce Basic methods for CentOS package installation, and a passwordless installation method that allows you to install packages without entering a password.

CentOS package installation

In CentOS, use the yum or dnf command to install the package. The following are the basic steps:

1. Open a terminal.

2. Use the following command to update the package list:

```sql

sudo yum update

```

Or

sudo dnf update

3. Install a software package. To install the vim editor, you can run:

sudo yum install vim

sudo dnf install vim

4. Wait for the installation to complete. During the installation process, the system may ask you if you want to continue. Just enter 'y' and press Enter.

5. After the installation is complete, you can start the vim editor you just installed by entering `vim`.

Passwordless installation

In some cases, you may want to install the package without entering a password. This can be achieved by setting up the sudoers file. Here is how to set up the sudoers file to achieve this. Steps for passwordless installation:

1. Open the sudoers file:

```bash

sudo visudo

2. Find this in the file One line: `root ALL=(ALL) ALL`, below this line add a new line with the same format as above, but replace 'root' with the username you wish to install without a password, if your username is 'username', then the added line should be: `username ALL=(ALL) NOPASSWD: ALL`.

3. Save and exit the editor. This user does not need to enter a password when executing sudo commands.

4. Please note that allowing passwordless installations may pose security risks, so please make sure you understand these risks and take appropriate security measures.

This article introduces the basic method of package installation in CentOS, and how to set up the sudoers file to achieve passwordless installation. I hope this information will be helpful to you! If you have any questions or need further assistance, please feel free to ask.

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