Upgrade a program in ubuntu

Apt-cachesearch searches for the appropriate packages and descriptions. Full description of apt-cacheshow. Apt-cacheshowpkg shows many details and relationships with other packages. Download apt-getinstall and install or upgrade all dependent packages. If a package is set to hold (stop flag, it will be put aside (that is, it will not be upgraded ). Apt-getremove [

Apt-cache search

Search for the expected packages and descriptions.

Apt-cache show

The complete description.

Apt-cache showpkg

Shows many details and relationships with other packages.

Apt-get install

Download and install or upgrade all dependent packages. If a package is set to hold (stop flag, it will be put aside (that is, it will not be upgraded ).

Apt-get remove [-- purge]

Remove and any other packages that depend on this package.

-- Purge indicates that the package should be completely purged (purged)