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 

Download and install 

(and dependencies)
install 	Install package 
configure [

]	Configure unpacked packages
remove 

Remove package 

flag  

...	Flag package(s) 

=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 

List all files belonging to 

search 		Search for a package providing 
info [pkg|regexp]		Display all info for 

status [pkg|regexp]		Display all status for 

download 

Download 

to current directory.
compare_versions   
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                Set verbosity level to . If no value is
--verbosity       provided increase verbosity by one. Verbosity levels:
0 errors only
1 normal messages (default)
2 informative messages
3 debug output
-f 		Use  as the opkg configuration file
-conf 	Default configuration file location
is /etc/opkg.conf
-d 		Use  as the the root directory for
-dest 	package installation, removal, upgrading.
 should be a defined dest name from
the configuration file, (but can also be a
directory name in a pinch).
-o 	Use  as the root directory for
-offline 	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*'