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Linux Server Management

# Linux Server Management

This article provides a comprehensive guide to managing a Linux server, focusing on essential tasks for maintaining a stable and secure environment. This is intended for newcomers to server administration and assumes a basic understanding of the Linux command line. We will cover user management, package management, firewall configuration, and basic monitoring.

User Management

Effective user management is crucial for security. We’ll cover creating, modifying, and deleting user accounts. Always use strong passwordsRefer to Secure Password Practices for more details.

Creating a New User

The `useradd` command is used to create new user accounts. The `-m` flag creates a home directory, and `-s` specifies the shell.

```bash sudo useradd -m -s /bin/bash newuser sudo passwd newuser ```

Modifying User Accounts

The `usermod` command modifies existing user accounts. For example, to change a user’s shell:

```bash sudo usermod -s /bin/zsh newuser ```

Deleting User Accounts

The `userdel` command deletes user accounts. The `-r` flag removes the home directory and mail spool. **Use with extreme caution**

```bash sudo userdel -r newuser ```

The following table summarizes user management commands:

Command Description
`useradd` Creates a new user account.
`usermod` Modifies an existing user account.
`userdel` Deletes a user account.
`passwd` Changes a user’s password.
`id` Displays user and group information.

Package Management

Package managers simplify software installation, updates, and removal. The specific package manager depends on the Linux distribution. This section details usage for Debian/Ubuntu (APT) and Red Hat/CentOS/Fedora (YUM/DNF). See Choosing a Linux Distribution for help selecting an OS.

Debian/Ubuntu (APT)

⚠️ *Note: All benchmark scores are approximate and may vary based on configuration. Server availability subject to stock.* ⚠️

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