Wednesday, 15 June 2011

Redhat Package Management (RPM)


Folks, Here is Quick Reference and HOWTO for RPM (Redhat Package Management). Hope it will be useful..


 Features:
  1. Provides package management
   a. Query
   b. Install
   c. Uninstall
   d. Upgrade
   e. Verify
  2. Auto-verifies packages using GPG, MD5, SHA1SUMs
  3. Automatically reports on unresolved dependencies




Install (Does NOT overwrite previous package):
Note: Use this method to install a new version of the kernel
  1. rpm -ivh *.rpm
  2. rpm -ivh http://192.168.75.100/RH5/i386/Server/dhcp-3.0.5-7.el5.i386.rpm



Upgrade (Installs or overwrites existing package):
  1. rpm -Uvh *.rpm
  2. rpm -Uvh http://192.168.75.100/RH5/i386/Server/dhcp-3.0.5-7.el5.i386.rpm

Freshen (Updates an existing package):
Note: Will NOT install the package, if it doesn't exist locally

  1. rpm -Fvh *.rpm - freshens the current version of a package


Removal:
 1. rpm -ev *.rpm - removes a pacakge
Note: removal process considers dependencies and will complain if the removal will break 1 or more packages. To get around this, use '--nodeps' option with 'rpm -ev --nodeps *.rpm'

 2. rpm -ev gftp


Query:


  1. rpm -qa - shows all installed packages
  2. rpm -qa | wc -l - this dumps all packages and provides a count
  3. rpm -qa | grep -i sendmail
  4. rpm -qi nano - dumps info. about the 'sendmail' package as it's recorded in the local RPM database
  5. rpm -qf /usr/bin/nano - dumps package membership info. for the 'nano' file
  6. rpm -qpi http://192.168.75.100/RH5/i386/Server/dhcp-3.0.5-7.el5.i386.rpm - dumps info. about the uninstalled 'dhcp' package, which resides on the repository
  7. rpm -ql package_name - returns all included files


Verify:
  1. rpm -Va - verifies ALL packages on the system, returning info. only if there are discrepancies from the original installation

  2. rpm -Vf /usr/bin/nano

Task: Change '/usr/bin/nano' then verify

SM5....T   /usr/bin/nano

S(file size), M(mode or permissions), 5(MD5), T(mod time)
  3. rpm -Vp nano

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