17-Installation

17-Installation - CSE 265: System and Network...

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Spring 2006 CSE 265: System and Network Administration ©2006 Brian D. Davison CSE 265: CSE 265: System and Network Administration System and Network Administration Software Installation, Localization, and Maintenance Installation, customization Keeping your systems up to date Package management: RPM Automating downloading and installation: YUM Change Management OS Upgrades Maintenance windows Service conversions
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Spring 2006 CSE 265: System and Network Administration ©2006 Brian D. Davison Software installation Software installation Linux is not pre-installed from most vendors And even if it were, you'd want to re-install! A sysadmin must Install Linux Automate mass installations Localize (customize) the systems Keep the systems updated Manage software packages
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Spring 2006 CSE 265: System and Network Administration ©2006 Brian D. Davison Linux installation Linux installation Basic Linux installation From our first project, you now have some experience with this It is usually easier with a CD-ROM or boot disk :-) Automating installation Many packages: Solaris JumpStart, Red Hat KickStart, Windows AutoLoad, IRIS RoboInst
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Spring 2006 CSE 265: System and Network Administration ©2006 Brian D. Davison Localization / Customization Localization / Customization A single common install is almost never enough Different hardware, different service requirements Need to automate any customization! Track some limited set of common configurations Probably want some custom or additional non-OS- supplied software e.g., GNU tools, graphics packages Often goes in /usr/local Sometimes want a more custom namespace Permit installation of multiple versions of a package
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Spring 2006 CSE 265: System and Network Administration ©2006 Brian D. Davison Keeping your systems up to date Keeping your systems up to date Assuming you have only a few, centrally- managed OS configurations How do you keep all the systems up to date? Copy files directly from master host e.g., with rsync or rdist difficult to use with core OS, OK for local filesystems Use package management system built into distro
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Spring 2006 CSE 265: System and Network Administration ©2006 Brian D. Davison Package management Package management Essentially all UNIX/Linux distributions use some kind of package management system These packages can include applications, source code, configuration files, etc. Usually can 'undo' the installation of a package too Can run scripts to customize the installation e.g., look in other config files for information
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CSE 265: System and Network Administration ©2006 Brian D. Davison RPM RPM Red Hat Package Manager rpm --install, --upgrade, --erase, --query How to use Download updated package rpm – upgrade openssh-2.9p2-12.i386.rpm Get errors saying other packages depend on old one! Download additional package updates
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17-Installation - CSE 265: System and Network...

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