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+# 📦 Managing Packages with `rpm` on RHEL/CentOS
+
+The `rpm` command (RPM Package Manager) is the **low-level package management tool** used on **Red Hat-based** systems such as RHEL, CentOS, Fedora, and others. Unlike `yum`, `rpm` does not resolve dependencies automatically and is best used for advanced or manual package management.
+
+Below are the core `rpm` commands categorized and explained.
+
+---
+
+## 📥 1. Installing Packages
+
+### `rpm -i <file.rpm>`
+
+### `rpm --install <file.rpm>`
+
+Installs a new `.rpm` package file. This command will **fail if the package's dependencies are not already installed**.
+
+```bash
+rpm -i <file.rpm>
+```
+
+or
+
+```bash
+rpm --install <file.rpm>
+```
+
+> 💡 Tip: Use `yum localinstall` or `dnf install` instead for dependency resolution.
+
+---
+
+## 🔄 2. Upgrading Packages
+
+### `rpm -U <file.rpm>`
+
+### `rpm --upgrade <file.rpm>`
+
+Upgrades an existing package if it is already installed. If the package is not already present, this command will install it.
+
+```bash
+rpm -U <file.rpm>
+```
+
+or
+
+```bash
+rpm --upgrade <file.rpm>
+```
+
+---
+
+## ❌ 3. Removing Packages
+
+### `rpm -e <package>`
+
+### `rpm --erase <package>`
+
+Removes a package from the system by name (not the filename). Note that this command also does **not resolve dependencies**, so it may break things if you're not careful.
+
+```bash
+rpm -e <package>
+```
+
+or
+
+```bash
+rpm --erase <package>
+```
+
+> ⚠️ Caution: Always check what depends on a package before removing it.
+
+---
+
+## 🔍 4. Querying Packages
+
+### `rpm -q <package>`
+
+Query whether a package is installed, and show its version.
+
+```bash
+rpm -q <package>
+```
+
+---
+
+### `rpm -qa`
+
+List **all installed packages**.
+
+```bash
+rpm -qa
+```
+
+---
+
+### `rpm -qi <package>`
+
+Displays detailed **information** about a specific installed package.
+
+```bash
+rpm -qi <package>
+```
+
+---
+
+### `rpm -ql <package>`
+
+Lists all files installed by a package.
+
+```bash
+rpm -ql <package>
+```
+
+---
+
+### `rpm -qf <file>`
+
+Finds out **which package** owns a specific file.
+
+```bash
+rpm -qf /usr/bin/wget
+```
+
+---
+
+### `rpm -qp <file.rpm>`
+
+Query a package file (without installing it) to see its metadata.
+
+```bash
+rpm -qp <file.rpm>
+```
+
+---
+
+### `rpm -K <file.rpm>`
+
+Verifies the **signature and integrity** of an RPM package file.
+
+```bash
+rpm -K <file.rpm>
+```
+
+---
+
+## 🛠️ 5. Verifying and Checking
+
+### `rpm -V <package>`
+
+Verifies installed package files against their original metadata (modifications, corruption, etc.).
+
+```bash
+rpm -V <package>
+```
+
+---
+
+### `rpm --test -i <file.rpm>`
+
+Simulates an install without actually installing the package — useful for testing.
+
+```bash
+rpm --test -i <file.rpm>
+```
+
+---
+
+## ✅ Final Notes
+
+* `rpm` is a **powerful low-level tool**, but not recommended for resolving dependencies.
+* For **automated dependency handling**, prefer using `yum` or `dnf`.
+* Use `rpm` when you need precise control over the package management process or are working with standalone `.rpm` files.
+
diff --git a/Linux/LPIC1/8-setup-ssh.md b/Linux/LPIC1/8-setup-ssh.md
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