Unlike Debian's packages.debian.org, CentOS doesn't have an official web interface for package browsing. However, you have several good alternatives:

• EPEL Package Browser: For EPEL repository packages (https://apps.fedoraproject.org/packages/)
• CentOS Vault: For older CentOS versions (http://vault.centos.org/)
• pkgs.org: Third-party package search (https://pkgs.org/)

The most powerful way to search packages in CentOS is through these commands:

# Search for a package by name
yum search package-name

# Get detailed info about a package
yum info package-name

# List all available packages
yum list available

# Search package contents
repoquery -l package-name

Let's say you're looking for Nginx:

# First search for available versions
yum search nginx

# Then get detailed information
yum info nginx

# View all files included in the package
repoquery -l nginx

For more advanced searches, use these commands:

# Search packages providing a specific file
yum provides */filename

# Find dependencies
yum deplist package-name

# Show changelog
yum changelog package-name

For faster searches, keep your package database updated:

# Clean cache
yum clean all

# Update metadata
yum makecache

# Check for updates
yum check-update

Coming from Debian/Ubuntu, you're probably familiar with the convenient packages.debian.org web interface. CentOS, being RHEL-based, has a different package management ecosystem. The primary ways to browse packages are:

While CentOS doesn't have an exact equivalent to packages.debian.org, these resources exist:

• EPEL: fedora.pkgs.org (for EPEL packages)
• CentOS Vault: vault.centos.org (for older versions)

As a CentOS sysadmin, you'll primarily use these tools:

# Search for a package
yum search package-name

# Get detailed info
yum info package-name

# List all available packages (CentOS 7)
repoquery -a --qf="%{name}" | sort

# List files in a package
rpm -ql package-name

CentOS 8 and newer use DNF as the default package manager:

# Search packages
dnf search term

# Show package details
dnf info package

# List available packages
dnf list available

For more advanced searching:

# Search package descriptions
repoquery --qf="%{name}: %{summary}" -a | grep -i "search term"

# List dependencies
repoquery --requires package-name

# Find which package provides a file
yum provides /path/to/file

Remember that CentOS uses RPM packages, so you can also use rpm commands:

# Query installed packages
rpm -qa | grep search-term

# Show info about an installed package
rpm -qi package-name