Recommendation is to use the bash shell, because he is strong enough, and absorbed the useful properties of ksh,csh,sh.
[Dev root @ sd-9c1f-2eac ~] # cat /etc/shells /bin/sh /bin/bash /sbin/nologin /bin/dash /bin/ksh /bin/tcsh /bin/csh /bin/ftponly /usr/bin/ftponly
[Dev root @ sd-9c1f-2eac /root]
# chsh -l /bin/sh /bin/bash /sbin/nologin /bin/dash /bin/ksh /bin/tcsh /bin/csh /bin/ftponly /usr/bin/ftponly