Linux Administration - Maintanence

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apt-get

Files

/etc/apt		- apt-get directory
/etc/apt/sources.list	- source list used to update packages on system

Commands
 apt-get update
Re-synchronizes package index files.

 apt-get upgrade
Upgrades packages on system to their newest versions.

 apt-get dist-upgrade
Does "apt-get upgrade" and resolves dependency issues

 apt-get -s dist-upgrade
Simulate distribution upgrade. Installs nothing.

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rpm

Commands

 rpm -Va > /tmp/rpmVa.log
Shows status of rpm installed files

 rpm -qf [full_path]
Find source binary package name

 rpm  -Uvh --nodeps --force [package]
Run from current dir containing the rpm file
Re-installs package

 rpm  -qa
Show everything installed on system.

 rpm  -qi [package]
Show information about package.

 rpm -q --whatrequires [package]
Determine dependencies of package.

 rpm  -e --test
Do mock removal.

 rpm  -e [package]
Remove package.

 rpm  --checksig [package]
Remove package.

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up2date

Commands

 up2date [package]
Red Hat package update tool.