yum

Overview

The yum (Yellowdog Updater Modified) command manages packages in RPM-based Linux systems. It handles package installation, updates, and removal.

Syntax

yum [options] command [package...]

Common Commands

Command Description
install Install packages
update Update packages
remove Remove packages
search Search packages
info Show package info
list List packages
check-update Check updates
clean Clean cache
groupinstall Install group
groupremove Remove group
history Transaction history
provides Find package providing file

Common Options

Option Description
-y Assume yes
-q Quiet mode
--nogpgcheck Skip GPG check
--enablerepo Enable repository
--disablerepo Disable repository
--exclude Exclude packages
--downloadonly Download only
--skip-broken Skip broken packages

Key Use Cases

  1. Package management
  2. System updates
  3. Dependency resolution
  4. Repository management
  5. System maintenance

Examples with Explanations

Example 1: Install Package

yum install package_name

Install specific package

Example 2: Update System

yum update

Update all packages

Example 3: Search Package

yum search keyword

Search for packages

Common Usage Patterns

  1. System update:

    yum check-update && yum update

  2. Group install:

    yum groupinstall "Development Tools"

  3. Clean cache:

    yum clean all

Security Considerations

  1. Repository security
  2. GPG verification
  3. Root privileges
  4. Network security
  5. Version control

Additional Resources

Best Practices

  1. Regular updates
  2. Clean cache
  3. Verify packages
  4. Backup configuration
  5. Test updates

Repository Management

  1. Configuration
  2. Priorities
  3. GPG keys
  4. Mirrors
  5. Custom repos

Troubleshooting

  1. Dependency issues
  2. Repository problems
  3. Network errors
  4. Space issues
  5. Lock files