/etc/apt/sources.list. An update should always be performed before an
upgrade or dist-upgrade; run by sudo, if necessary.
-: **CH** (//./configure --help//)
-Lists available compilation options for building program from source.
-
-: **CO** (//./configure//)
-Prepares compilation for building program from source.
-
: **da** (//du -sch//)
Prints the summarized disk usage of the arguments as well as a grand total
in human readable format.