To register your RHEL 5.x system with RHN type the following command and just follow on screen instructions (CentOS user skip to the next step): #...

To list all installed packages, enter: $ rpm -qa ## not recommend just use yum ## $ yum list installed Sample outputs:

You can search the package descriptions for the specified string using search command. The list command can be used too. To search httpd and all ma...

To install package called httpd: # yum install {package-name-1} {package-name-2} # yum install httpd # yum install nginx mariadb-server php-fpm # y...

Remove package called httpd, enter: # yum remove {package-name-1} {package-name-2} # yum erase {package-name-1} {package-name-2} # yum remove httpd...

Install all ‘Development Tools’ group packages, enter: # yum groupinstall "Development Tools" OR # yum groups install "Development Tools"

Update all ‘Development Tools’ group packages, enter: # yum groupupdate "Development Tools" OR # yum groups update "Development Tools"

Remove all ‘Development Tools’ group packages, enter: # yum groupremove "Development Tools" OR # yum groups remove "Development Tools"

$ yum groupinfo 'Development Tools' OR $ yum groups info 'Development Tools' $ yum groups info 'File and Print Server' Sample outputs:

If you are using 64 bit RHEL version it is possible to install 32 packages (please note that 32 bit support is dropped in the latest version of Cen...