The equery tool is used for viewing package information.

(b)elongs

list what package FILES belong to

(c)hanges

list changelog entries for ATOM

chec(k)

verify checksums and timestamps for PKG

(d)epends

list all packages directly depending on ATOM

dep(g)raph

display a tree of all dependencies for PKG

(f)iles

list all files installed by PKG

h(a)s

list all packages for matching ENVIRONMENT data stored in /var/db/pkg

(h)asuse

list all packages that have USE flag

ke(y)words

display keywords for specified PKG

(l)ist

list package matching PKG

(m)eta

display metadata about PKG

(s)ize

display total size of all files owned by PKG

(u)ses

display USE flags for PKG

(w)hich

print full path to ebuild for PKG

Show Package Files

~ $ equery files pciutils
~ $ equery files dev-lang/php

Show Package Size

~ $ equery size pciutils
~ $ equery s dev-lang/php

Which Package Owns File

~ $ equery belongs /usr/bin/which
~ $ equery b libgnutls-openssl.so.26.16.14
~ $ equery b $(which awk)