Some options have alternative names. These aliases are never used for output, but can be used just like normal option names when specifying options to the shell.
BRACE_EXPANDNO_IGNORE_BRACES
(ksh and bash compatibility)
DOT_GLOBGLOB_DOTS
(bash compatibility)
HASH_ALLHASH_CMDS
(bash compatibility)
HIST_APPENDAPPEND_HISTORY
(bash compatibility)
HIST_EXPANDBANG_HIST
(bash compatibility)
LOGNO_HIST_NO_FUNCTIONS
(ksh compatibility)
MAIL_WARNMAIL_WARNING
(bash compatibility)
ONE_CMDSINGLE_COMMAND
(bash compatibility)
PHYSICALCHASE_LINKS
(ksh and bash compatibility)
PROMPT_VARSPROMPT_SUBST
(bash compatibility)
STDINSHIN_STDIN
(ksh compatibility)
TRACK_ALLHASH_CMDS
(ksh compatibility)