13 demo instances deal with RPM package management tools

Preface:If you are lucky to be seen by a friend and find something wrong in this article, you may want to criticize and correct it. If you have any questions, we hope you can discuss them together.

What is RPM?

Rpm is short for "RedHat Package Manager" and is now changed to "rpm is Package Manager ". On Linux/UNIX operating systems, the RPM package management tool allows system administrators to install, update, uninstall, query, verify, and manage RPM packages. The basic functions of the RPM package management tool.

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Preparations

To better demonstrate the RPM package management tool, we need to mount the CD image to the file system. The main steps are as follows:

1. Click the CD mark on the VM and select Settings ...;

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2. In the displayed dialog box, click: browse..., select the Linux operating system CD image file, and click: OK;

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3. Click the CD mark on the VM and select connect;

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4. Mount the CD image to the file system on the command line.

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Tip: You can also directly obtain the RPM package from the network when the network is connected.

1. How to check the legitimacy and integrity of the RPM package source?

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Note: 1. Import the public key of the package maker on the current system;

2. All public keys in GPG format imported are displayed on the current system;

3. Check the legitimacy and integrity of the httpd-2.2.15-29.el6.centos.x86_64.rpm package;

2. How to check the dependency of the RPM package before installation or upgrade?

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3. How to install the RPM package?

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Note: Ignore the RPM package dependency and install the RPM package: rpm-IVH -- nodeps RPM package

4. How do I check whether the file attributes generated by the installed RPM package have changed?

1. Check whether the file attributes generated by a package have changed.

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Changes that occur before and after modifying the file attributes generated by the installed RPM package.

2. listing all the file attributes generated by the package changes

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5. How can I check whether an RPM package is installed or not?

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6. How do I install all the RPM packages?

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Note: view the currently installed RPM package and its date: rpm-Qa -- last

7. How do I query all files generated by the installed RPM package?

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8. How to update an installed RPM package?

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9. How to uninstall an installed RPM package?

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Note: uninstall the RPM package that has been installed to ignore dependencies: rpm-evv -- nodeps RPM package

10. How can I query uninstalled packages?

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11. How do I query the RPM package description?

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12. How can I query which RPM package generates a file?

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13. How to reconstruct the RPM database?

Database directory:/Var/lib/RPM

Reconstruction:

Rpm -- initdb: initialization

If no database exists, a new one is created. If yes, no new one is created;

Rpm -- rebuilddb: Rebuilding

Directly re-build and overwrite the original database.

Updating...

13 demo instances deal with RPM package management tools