lastpipe
If set, and job control is not active, the shell runs the last command of a pipeline not executed in the background in the current shell environment. lithist
If enabled, and the cmdhist option is enabled, multi-line commands are saved to the history with embedded newlines rather than using semicolon separators where possible. login_shell
The shell sets this option if it is started as a login shell (see
Section 6.1 [Invoking Bash], page 80).
The value may not be changed. mailwarn
If set, and a file that Bash is checking for mail has been accessed since the last time it was checked, the message "The mail in mail- file has been read" is displayed. no_empty_cmd_completion
If set, and Readline is being used, Bash will not attempt to search the PATH for possible completions when completion is attempted on an empty line. nocaseglob
If set, Bash matches filenames in a case-insensitive fashion when performing filename expansion. nocasematch
If set, Bash matches patterns in a case-insensitive fashion when performing matching while executing case or [[ conditional com- mands. nullglob
If set, Bash allows filename patterns which match no files to expand to a null string, rather than themselves. progcomp
If set, the programmable completion facilities (see Section 8.6 [Pro- grammable Completion], page 124) are enabled.
This option is enabled by default. promptvars
If set, prompt strings undergo parameter expansion, command substitution, arithmetic expansion, and quote removal after being expanded as described below (see Section 6.9 [Controlling the
Prompt], page 92). This option is enabled by default. restricted_shell
The shell sets this option if it is started in restricted mode (see
Section 6.10 [The Restricted Shell], page 93). The value may not be changed. This is not reset when the startup files are executed, allowing the startup files to discover whether or not a shell is re- stricted. shift_verbose
If this is set, the shift builtin prints an error message when the shift count exceeds the number of positional parameters.