YUM

1
YUM

• What is Yum?
• Yellow-dog updater, modified (YUM?, YUP?)
• Developed by Seth Vidal and other volunteers
• Managed by Duke University
• GPL

2
Why Yum

• Why?
• Software Updates
• Kernel Updates
• Extra RPMs

3
How YUM works.

• Packages (RPM)
• Repositories
• Base
• Updates
• Extras
• Dependencies

4
How to use YUM

• Installing new software
• yum install packagename
• Updating software
• yum update packagename
• Removing software
• yum remove packagename

5
Searching with yum

• yum list packagename
• yum search searchcriteria

6
Updating the entire system

• yum update
• yum y update

7
YUM important notes

• Fedora systems automatically uses the Fedora
  Project repositories.
• If a package requires dependencies, yum will
  automatically try to acquire the required
  packages.

8
Modifying the kernel
9
Kernel management with /proc

• What is /proc?
• Similar to /dev
• Interact with system resources as if they were
  files
• Provides information on what kernel is doing
• Cat /proc/meminfo

10
Kernel management with modules

• lsmod
• Modinfo
• Modprobe
• rmmod

11
Kernel Management with source

• install fedora-rpmdevtools
• download yum-utils
• vi /etc/yum.repos.d change source to 1
• download source
• rpm Uvh kernel
• cd /usr/src/redhat/SPECS
• rpmbuild bp target (arch) kernel-2.6.spec
• ln s

12
Kernel Management (cont.)

• Cd to /usr/src/linux
• Make config
• Answer questions
• Make clean make dep make bzImage make modules
  make modules_install
• Make install (moves compiled kernel files to
  /boot)