Z:gnu-bash--255275-Set or unset values of shell o/en

Set or unset values of shell options and positional parameters. Change the value of shell attributes and positional parameters, or   display the names and values of shell variables. Options: -a Mark variables which are modified or created for export. -b Notify of job termination immediately. -e Exit immediately if a command exits with a non-zero status. -f Disable file name generation (globbing). -h Remember the location of commands as they are looked up. -k All assignment arguments are placed in the environment for a          command, not just those that precede the command name. -m Job control is enabled. -n Read commands but do not execute them. -o option-name Set the variable corresponding to option-name: allexport   same as -a braceexpand same as -B emacs       use an emacs-style line editing interface errexit     same as -e errtrace    same as -E functrace   same as -T hashall     same as -h histexpand  same as -H history     enable command history ignoreeof   the shell will not exit upon reading EOF interactive-comments allow comments to appear in interactive commands keyword     same as -k monitor     same as -m noclobber   same as -C noexec      same as -n noglob      same as -f nolog       currently accepted but ignored notify      same as -b nounset     same as -u onecmd      same as -t physical    same as -P pipefail    the return value of a pipeline is the status of                           the last command to exit with a non-zero status, or zero if no command exited with a non-zero status posix       change the behavior of bash where the default operation differs from the Posix standard to                          match the standard privileged  same as -p verbose     same as -v vi          use a vi-style line editing interface xtrace      same as -x -p Turned on whenever the real and effective user ids do not match. Disables processing of the $ENV file and importing of shell functions. Turning this option off causes the effective uid and gid to be set to the real uid and gid. -t Exit after reading and executing one command. -u Treat unset variables as an error when substituting. -v Print shell input lines as they are read. -x Print commands and their arguments as they are executed. -B the shell will perform brace expansion -C If set, disallow existing regular files to be overwritten by redirection of output. -E If set, the ERR trap is inherited by shell functions. -H Enable ! style history substitution. This flag is on         by default when the shell is interactive. -P If set, do not resolve symbolic links when executing commands such as cd which change the current directory. -T If set, the DEBUG trap is inherited by shell functions. -- Assign any remaining arguments to the positional parameters. If there are no remaining arguments, the positional parameters are unset. -  Assign any remaining arguments to the positional parameters. The -x and -v options are turned off. Using + rather than - causes these flags to be turned off. The flags can also be used upon invocation of the shell. The current set of flags may be found in $-. The remaining n ARGs are positional parameters and are assigned, in order, to $1, $2, .. $n. If no   ARGs are given, all shell variables are printed. Exit Status: Returns success unless an invalid option is given.