DPKG command set and apt-get used by Debian/Ubuntu.
RPM and YUM used by CentOS, Red hat, SUSE, Yellow Dog, Fedora
(Can convert using a tool called Alien).
RPM (Redhat Package Manager) is a package manager, but cannot resolve dependencies.
YUM (YellowDog Update Modifier) is a frontend to RPM and can manage dependencies.
RPM Naming : package_name.versionnumber-buildnumber.architecture.rpm
man yum (for manual)
yum install wget
Practise using rpm and yum
rpm -i nano-2.2.6-1.i386.rpm
But we already have a package called nano installed (whereis nano )
rpm -e nano (extracts i.e. removes existing nano)
rpm -ihv nano-2.2.6-1.i386.rpm (installs and shows progress but fails die to missing dependencies)
yum nano-2.2.6-1.i386.rpm (works fine).
rpm -qi nano - tells us the package name and details like install date
rpm -q --list nano - all files installed with nano package
rpm -qR nano -queries all Requirements i.e dependencies
rpm --rebuilddb (cleans the rpm cache)
Global Configuration file for RPM is in cat /usr/lib/rpm/rpmrc (don't need to change it)
tail /usr/lib/rpm/rpm.log (shows wehre log file is)
vi /var/log/rpmpkgs (can look at log file)
YUM Software Management
vi /etc/yum/yum.conf - config file , can add new source repos here
or in /etc/yum/repos.d , each file is a separate repo that has sources.
or yum update
CHECK FOR INSTALLED PACKAGE UPDATES
yum search http (eg searching to install apache)
yum install http
yum check-update http
yum check-upgrade (checks to see if yum needs upgrading)
yum info httpd.i686 (same as rmp qi)
yum deplist (dependency list)
can append --force , to force install even if dependencies are not there.
yumdownloader & rpm2cpio
yumdownloader--resolve httpd (just download the rpm package and dependencies not install etc)
To view contents of the rpm use the cpio utility for std input and std output
rpm2cpio package_name.rpm |cpio -t (converts rpm to std output (messy to read as its code), then the cpio -t lets us view it)