Yum cheatsheet (#2101)

See the documentation used : https://access.redhat.com/sites/default/files/attachments/rh_yum_cheatsheet_1214_jcs_print-1.pdf

yum.md

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+---
+title: YUM
+category: CLI
+layout: 2017/sheet
+updated: 2024-02-07
+---
+
+## Queries
+
+### Help and Lists
+
+```bash
+yum help                     # Display yum commands and options
+yum list available           # List all available packages
+yum list installed           # List all installed packages
+yum list kernel              # List installed and available kernel packages
+yum info vsftpd              # List info about vsftpd package
+```
+
+### Searching and Dependencies
+
+```bash
+yum deplist nfs-utils        # List dependencies for nfs-utils
+yum provides "*bin/top"      # Show package containing top command
+yum search samba             # Find packages with samba in name or description
+```
+
+### Updating and Security
+
+```bash
+yum updateinfo security      # Get info on available security updates
+yum update --security        # Apply security-related package updates
+```
+
+## Managing Repositories
+
+```bash
+yum repolist                 # Display enabled software repositories
+yum repoinfo rhel-7-server-rpms  # See info on specific repo
+yum repo-pkgs my-rpms list       # List packages from a specific repo
+```
+
+## Installation and Upgrades
+
+```bash
+yum install vsftpd           # Install the vsftpd package
+yum update                   # Update all packages
+yum downgrade abc            # Downgrade the abc package to an earlier version
+yum autoremove httpd         # Remove httpd and unneeded packages
+```
+
+## Package Groups
+
+```bash
+yum groupinstall "Web server"    # Install Web Server packages
+```
+
+## Troubleshooting
+
+```bash
+yum history list             # List all yum transactions
+yum clean packages           # Delete packages saved in cache
+```
+
+## Popular Options
+
+```bash
+-y                           # Assume yes if prompted
+--disablerepo=epel           # Disable a specific repo for a command
+--downloadonly               # Download package to cache but don't install
+```