Description:

The GNU Bourne Again shell (Bash) is a shell or command language
interpreter that is compatible with the Bourne shell (sh). Bash
incorporates useful features from the Korn shell (ksh) and the C shell
(csh). Most sh scripts can be run by bash without modification. This
package (bash) contains bash version 4.2, which improves POSIX
compliance over previous versions. However, many old shell scripts
will depend upon the behavior of bash 1.14, which is included in the
bash1 package. Bash is the default shell for Red Hat Linux. It is
popular and powerful, and you'll probably end up using it.

Documentation for bash version 4.2 is contained in the bash-doc
package.