62 lines
3.1 KiB
Markdown
62 lines
3.1 KiB
Markdown
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# The `yum` command
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The `yum`command is the primary package management tool for installing, updating, removing, and managing software packages in Red Hat Enterprise Linux. It is an acronym for _`Yellow Dog Updater, Modified`_.
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`yum` performs dependency resolution when installing, updating, and removing software packages. It can manage packages from installed repositories in the system or from .rpm packages.
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### Syntax:
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```[linux]
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yum -option command
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```
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### Examples:
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1. To see an overview of what happened in past transactions:
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```[linux]
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yum history
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```
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2. To undo a previous transaction:
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```[linux]
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yum history undo <id>
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```
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3. To install firefox package with 'yes' as a response to all confirmations
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```[linux]
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yum -y install firefox
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```
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4. To update the mysql package it to the latest stable version
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```[linux]
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yum update mysql
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```
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### Commonly used commands along with yum:
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| **Command** | **Description** |
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| :------------- | :------------------------------------------------ |
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| `install` | Installs the specified packages |
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| `remove` | Removes the specified packages |
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| `search` | Searches package metadata for keywords |
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| `info` | Lists the description |
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| `update` | Updates each package to the latest version |
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| `repolist` | Lists repositories |
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| `history` | Displays what has happened in past transactions |
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| `groupinstall` | To install a particular package group |
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| `clean` | To clean all cached files from enabled repository |
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### Additional Flags and their Functionalities:
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| **Short Flag** | **Long Flag** | **Description** |
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| :---------------- | :-------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| `-C` | `--cacheonly` | Runs entirely from system cache, doesn’t update the cache and use it even in case it is expired. |
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| <center>-<center> | `--security` | Includes packages that provide a fix for a security issue. Applicable for the upgrade command. |
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| `-y` | `--assumeyes` | Automatically answer yes for all questions. |
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| <center>-<center> | `--skip-broken` | Resolves depsolve problems by removing packages that are causing problems from the transaction. It is an alias for the strict configuration option with value False. |
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| `-v` | `--verbose` | Verbose operation, show debug messages. |
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