While your Overo comes with an extensive set of demo software, it is likely that you will want to add additional software to suit your interests. Overo includes a package management system with access to hundreds of additional popular software packages.

To update your software to the lastest release of all installed packages:

$ opkg update
$ opkg upgrade

To view a list of the software currently installed on your machine:

$ opkg list_installed

To install a new software package (perl in this example):

$ opkg update
$ opkg install perl

To view a list of all packages that are available for you to install (be prepared, it's a long list):

$ opkg update
$ opkg list

To remove a package you no longer need (again perl for this example):

$ opkg remove perl

Usage information for opkg:

opkg version 0.1.5
usage: opkg [options...] sub-command [arguments...]
where sub-command is one of:

Package Manipulation:
	update  		Update list of available packages
	upgrade			Upgrade all installed packages to latest version
	install <pkg>		Download and install <pkg> (and dependencies)
	install <file.opk>	Install package <file.opk>
	configure [<pkg>]	Configure unpacked packages
	remove <pkg|regexp>	Remove package <pkg|packages following regexp>
	flag <flag> <pkg> ...	Flag package(s) <pkg>
	 <flag>=hold|noprune|user|ok|installed|unpacked (one per invocation)	

Informational Commands:
	list    		List available packages and descriptions
	list_installed		List all and only the installed packages and description 
	files <pkg>		List all files belonging to <pkg>
	search <file|regexp>		Search for a package providing <file>
	info [pkg|regexp]		Display all info for <pkg>
	status [pkg|regexp]		Display all status for <pkg>
	download <pkg>		Download <pkg> to current directory.
	compare_versions <v1> <op> <v2>
	                          compare versions using <= < > >= = << >>
	print_architecture      prints the architecture.
	print_installation_architecture
	whatdepends [-A] [pkgname|pat]+
	whatdependsrec [-A] [pkgname|pat]+
	whatprovides [-A] [pkgname|pat]+
	whatconflicts [-A] [pkgname|pat]+
	whatreplaces [-A] [pkgname|pat]+
	                        prints the installation architecture.

Options:
	-A                      Query all packages with whatdepends, whatprovides, whatreplaces, whatconflicts
	-V <level>               Set verbosity level to <level>. If no value is
	--verbosity <level>      provided increase verbosity by one. Verbosity levels:
	                         0 errors only
	                         1 normal messages (default)
	                         2 informative messages
	                         3 debug output
	-f <conf_file>		Use <conf_file> as the opkg configuration file
	-conf <conf_file>	Default configuration file location
				is /etc/opkg.conf
	-d <dest_name>		Use <dest_name> as the the root directory for
	-dest <dest_name>	package installation, removal, upgrading.
				<dest_name> should be a defined dest name from
				the configuration file, (but can also be a
				directory name in a pinch).
	-o <offline_root>	Use <offline_root> as the root directory for
	-offline <offline_root>	offline installation of packages.
	Force Options (use when opkg is too smart for its own good):
	-force-depends		Make dependency checks warnings instead of errors
					Install/remove package in spite of failed dependences
	-force-defaults		Use default options for questions asked by opkg.
				(no prompts). Note that this will not prevent
				package installation scripts from prompting.
	-force-reinstall 	Allow opkg to reinstall a package.
	-force-overwrite 	Allow opkg to overwrite files from another package during an install.
	-force-downgrade 	Allow opkg to downgrade packages.
	-force_space            Install even if there does not seem to be enough space.
	-noaction               No action -- test only
	-nodeps                 Do not follow dependences
	-force-removal-of-dependent-packages
	-recursive	 	Allow opkg to remove package and all that depend on it.
	-autoremove	 	Allow opkg to remove packages that where installed automatically to satisfy dependencies.
	-test                   No action -- test only
	-t	 	        Specify tmp-dir.
	--tmp-dir 	        Specify tmp-dir.

	regexp could be something like 'pkgname*' '*file*' or similar
	eg: opkg info 'libstd*'  or opkg search '*libop*' or opkg remove 'libncur*'