Linux Package Management with RPM and YUM

RPM :- Redhad Package Manager

rpm just install the single rpm file. It does not take care of dependency packages.
yum take care of denpendency packages.

ftp                 = vsftpd-2.2.2-11.el6.x86_64.rpm

apache server = httpd-2.2.15-26.0.1.el6.x86_64.rpm

telnet             = telnet-0.17-47.el6_3.1.x86_64.rpm

format:
--..rpm

RPM Features

Provides package management

• Install
• Remove or Uninstall
• Query 
• Upgrade
• Verify   

Automatically verifies packages using GPG, MD5, SHA1SUMs
Automatically reports on unresolved dependencies. 

Find out the installed packages

rpm -qa
-q = query package
-a = all installed packages

[root@oel11 yum.repos.d]# rpm -qa vsftpd
vsftpd-2.2.2-11.el6.x86_64
[root@oel11 yum.repos.d]# rpm -qa telnet
[root@oel11 yum.repos.d]#

Here vsftp returns packages that means this is installed on our server. In second command telnet doesnt returns any row and show not installed on the server.

Search specific rpm package

[root@oel11 yum.repos.d]# rpm -qa | grep vsftp
vsftpd-2.2.2-11.el6.x86_64 

[root@oel11 etc]# rpm -qa | grep httpd
httpd-manual-2.2.15-26.0.1.el6.noarch
httpd-tools-2.2.15-26.0.1.el6.x86_64
httpd-2.2.15-26.0.1.el6.x86_64

Get information about the package

rpm -qi httpd
rpm -qi httpd-2.2.15-26.0.1.el6.x86_64

[root@oel11 etc]# rpm -qi httpd-2.2.15-26.0.1.el6.x86_64
Name        : httpd                        Relocations: (not relocatable)
Version     : 2.2.15                            Vendor: Oracle America
Release     : 26.0.1.el6                    Build Date: Sat 23 Feb 2013 01:32:52 AM IST
Install Date: Tue 28 Feb 2017 01:03:23 AM IST      Build Host: ca-build44.us.oracle.com
Group       : System Environment/Daemons    Source RPM: httpd-2.2.15-26.0.1.el6.src.rpm
Size        : 3074819                          License: ASL 2.0
Signature   : RSA/8, Sat 23 Feb 2013 01:33:03 AM IST, Key ID 72f97b74ec551f03
URL         : http://httpd.apache.org/
Summary     : Apache HTTP Server
Description :
The Apache HTTP Server is a powerful, efficient, and extensible
web server.

List all files from the package

[root@oel11 yum.repos.d]# rpm -ql vsftpd-2.2.2-11.el6.x86_64
/etc/logrotate.d/vsftpd
/etc/pam.d/vsftpd
/etc/rc.d/init.d/vsftpd
/etc/vsftpd
/etc/vsftpd/ftpusers
/etc/vsftpd/user_list
/etc/vsftpd/vsftpd.conf
/etc/vsftpd/vsftpd_conf_migrate.sh
/usr/sbin/vsftpd
/usr/share/doc/vsftpd-2.2.2
/usr/share/doc/vsftpd-2.2.2/AUDIT
/usr/share/doc/vsftpd-2.2.2/BENCHMARKS
/usr/share/doc/vsftpd-2.2.2/BUGS
/usr/share/doc/vsftpd-2.2.2/COPYING
/usr/share/doc/vsftpd-2.2.2/Changelog
/usr/share/doc/vsftpd-2.2.2/EXAMPLE
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/INTERNET_SITE
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/INTERNET_SITE/README
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/INTERNET_SITE/README.configuration
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/INTERNET_SITE/vsftpd.conf
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/INTERNET_SITE/vsftpd.xinetd
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/INTERNET_SITE_NOINETD
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/INTERNET_SITE_NOINETD/README
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/INTERNET_SITE_NOINETD/README.configuration
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/INTERNET_SITE_NOINETD/vsftpd.conf
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/PER_IP_CONFIG
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/PER_IP_CONFIG/README
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/PER_IP_CONFIG/README.configuration
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/PER_IP_CONFIG/hosts.allow
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/README
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/VIRTUAL_HOSTS
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/VIRTUAL_HOSTS/README
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/VIRTUAL_USERS
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/VIRTUAL_USERS/README
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/VIRTUAL_USERS/README.configuration
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/VIRTUAL_USERS/logins.txt
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/VIRTUAL_USERS/vsftpd.conf
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/VIRTUAL_USERS/vsftpd.pam
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/VIRTUAL_USERS_2
/usr/share/doc/vsftpd-2.2.2/EXAMPLE/VIRTUAL_USERS_2/README
/usr/share/doc/vsftpd-2.2.2/FAQ
/usr/share/doc/vsftpd-2.2.2/INSTALL
/usr/share/doc/vsftpd-2.2.2/LICENSE
/usr/share/doc/vsftpd-2.2.2/README
/usr/share/doc/vsftpd-2.2.2/README.security
/usr/share/doc/vsftpd-2.2.2/REWARD
/usr/share/doc/vsftpd-2.2.2/SECURITY
/usr/share/doc/vsftpd-2.2.2/SECURITY/DESIGN
/usr/share/doc/vsftpd-2.2.2/SECURITY/IMPLEMENTATION
/usr/share/doc/vsftpd-2.2.2/SECURITY/OVERVIEW
/usr/share/doc/vsftpd-2.2.2/SECURITY/TRUST
/usr/share/doc/vsftpd-2.2.2/SIZE
/usr/share/doc/vsftpd-2.2.2/SPEED
/usr/share/doc/vsftpd-2.2.2/TODO
/usr/share/doc/vsftpd-2.2.2/TUNING
/usr/share/doc/vsftpd-2.2.2/vsftpd.xinetd
/usr/share/man/man5/vsftpd.conf.5.gz
/usr/share/man/man8/vsftpd.8.gz
/var/ftp
/var/ftp/pub

How to install package

rpm -ivh
-i = Install the rpm
-v = verbose 
-h = display progress

- first identify where the package exists.
- linux media contains all the packages. user can download it from internet or linux dvd.
- rpm does not install the dependency packages. for this we use yum. 

How to upgrade package

rpm -qa vsftpd

rpm -Uvh vsftpd-2.2.2-11.el6.x86_64.rpm

Erase package

rpm -e
-e = Erase the package. just give package name without ".rmp"

rpm -e vsftpd
or
rpm -e vsftpd-2.2.2-11.el6.x86_64
rpm -qa vsftpd

Check apache service status

service httpd status

Start and Enable SSH Server

chkconfig sshd on
service sshd start

Check port 22 is open

netstat -tulpn | grep :22

Start/ Stop/ Status iptables service

service iptables status

service iptables start

service iptables stop