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6.2.2. Usage examples

Below ls is an alias for list, lsi is an alias for ls installed and lsu is an alias for list updates.
Lists all packages, whether installed or available.
# yum ls 
zziplib.x86_64                 0.13.49-8.fc12               fedora  
zziplib-devel.i686             0.13.49-8.fc12               fedora  
zziplib-devel.x86_64           0.13.49-8.fc12               fedora  
zziplib-utils.x86_64           0.13.49-8.fc12               fedora  
zzuf.x86_64                    0.13-1.fc13                  fedora
Lists installed packages.
# yum lsi 
zip.x86_64                     3.0-1.fc13                   @anaconda-InstallationRepo.x86_64
zlib.i686                      1.2.3-23.fc12                @fedora/12
zlib.x86_64                    1.2.3-23.fc12                @anaconda-InstallationRepo.x86_64/12
zlib-devel.x86_64              1.2.3-23.fc12                @fedora/12
zvbi.x86_64                    0.2.33-4.fc12                @fedora/12
Lists all available updates.
# yum lsu
curl.x86_64                    7.20.1-4.fc13                updates
libcurl.i686                   7.20.1-4.fc13                updates
libcurl.x86_64                 7.20.1-4.fc13                updates
Updates a package.
# yum up curl
Dependencies Resolved

 Package                     Arch       Version            Repository  Size
 curl            x86_64         7.20.1-4.fc13          updates         203 k
Updating for dependencies:
 libcurl         i686           7.20.1-4.fc13          updates         181 k
 libcurl         x86_64         7.20.1-4.fc13          updates         175 k

Transaction Summary
Upgrade       3 Package(s)

Total download size: 559 k
Is this ok [y/N]: 
Available alias
There are many predefined alias in /etc/yum/aliases.conf you can use, and of course, you can add new ones. Using yum alias you can list the configured aliases, in this case you get:
# yum alias
Loaded plugins: aliases, filter-data, presto
Alias ALL = --enablerepo=development --enablerepo=updates-testing --enablerepo=fedora-source --enablerepo=updates-source --enablerepo=development-source --enablerepo=updates-testing-source --enablerepo=fedora-debuginfo --enablerepo=updates-debuginfo --enablerepo=development-debuginfo --enablerepo=updates-testing-debuginfo
Alias ALLDBG = --enablerepo=fedora-debuginfo --enablerepo=updates-debuginfo --enablerepo=development-debuginfo --enablerepo=updates-testing-debuginfo
Alias ALLSRC = --enablerepo=fedora-source --enablerepo=updates-source --enablerepo=development-source --enablerepo=updates-testing-source
Alias DBG = --enablerepo=fedora-debuginfo --enablerepo=updates-debuginfo
Alias DEV = --enablerepo=development
Alias DEVDBG = --enablerepo=development-debuginfo
Alias DEVSRC = --enablerepo=development-source
Alias DUPS = --showduplicates
Alias FORCE = --skip-broken --disableexcludes=all
Alias SEC = --security
Alias SRC = --enablerepo=fedora-source --enablerepo=updates-source
Alias UPT = --enablerepo=updates-testing
Alias UPTDBG = --enablerepo=updates-testing-debuginfo
Alias UPTSRC = --enablerepo=updates-testing-source
Alias chk = check-update
Alias dbg-inst = --enablerepo=fedora-debuginfo --enablerepo=updates-debuginfo install
Alias dbg-install = --enablerepo=fedora-debuginfo --enablerepo=updates-debuginfo install
Alias down = downgrade
Alias force-inst = --skip-broken --disableexcludes=all install
Alias force-install = --skip-broken --disableexcludes=all install
Alias force-up = --skip-broken --disableexcludes=all upgrade
Alias force-update = --skip-broken --disableexcludes=all update
Alias force-upgrade = --skip-broken --disableexcludes=all upgrade
Alias h = history
Alias hi = history info
Alias hl = history list
Alias hs = history summary
Alias in = install
Alias inst = install
Alias ls = list
Alias lsa = list available
Alias lsi = list installed
Alias lssu = --security list updates
Alias lsu = list updates
Alias lupi = list-updateinfo
Alias rein = reinstall
Alias rm = remove
Alias up = upgrade
Alias v = version
alias done
Add an alias with yum alias
# yum alias ver version
alias done
# yum alias ver 
Alias ver = version
alias done