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388.

BASH_VERSION[tab]Version information for this Bash.
CDPATH[tab]A colon-separated list of directories to search
[tab][tab]for directries given as arguments to `cd'.
GLOBIGNORE[tab]A colon-separated list of patterns describing filenames to
[tab][tab]be ignored by pathname expansion.
HISTFILE[tab]The name of the file where your command history is stored.
HISTFILESIZE[tab]The maximum number of lines this file can contain.
HISTSIZE[tab]The maximum number of history lines that a running
[tab][tab]shell can access.
HOME[tab]The complete pathname to your login directory.
HOSTNAME[tab]The name of the current host.
HOSTTYPE[tab]The type of CPU this version of Bash is running under.
IGNOREEOF[tab]Controls the action of the shell on receipt of an EOF
[tab][tab]character as the sole input. If set, then the value
[tab][tab]of it is the number of EOF characters that can be seen
[tab][tab]in a row on an empty line before the shell will exit
[tab][tab](default 10). When unset, EOF signifies the end of input.
MACHTYPE[tab]A string describing the current system Bash is running on.
MAILCHECK[tab]How often, in seconds, Bash checks for new mail.
MAILPATH[tab]A colon-separated list of filenames which Bash checks
[tab][tab]for new mail.
OSTYPE[tab]The version of Unix this version of Bash is running on.
PATH[tab]A colon-separated list of directories to search when
[tab][tab]looking for commands.
PROMPT_COMMAND[tab]A command to be executed before the printing of each
[tab][tab]primary prompt.
PS1[tab][tab]The primary prompt string.
PS2[tab][tab]The secondary prompt string.
PWD[tab][tab]The full pathname of the current directory.
SHELLOPTS[tab]A colon-separated list of enabled shell options.
TERM[tab]The name of the current terminal type.
TIMEFORMAT[tab]The output format for timing statistics displayed by the
[tab][tab]`time' reserved word.
auto_resume[tab]Non-null means a command word appearing on a line by
[tab][tab]itself is first looked for in the list of currently
[tab][tab]stopped jobs. If found there, that job is foregrounded.
[tab][tab]A value of `exact' means that the command word must
[tab][tab]exactly match a command in the list of stopped jobs. A
[tab][tab]value of `substring' means that the command word must
[tab][tab]match a substring of the job. Any other value means that
[tab][tab]the command must be a prefix of a stopped job.
histchars[tab]Characters controlling history expansion and quick
[tab][tab]substitution. The first character is the history
[tab][tab]substitution character, usually `!'. The second is
[tab][tab]the `quick substitution' character, usually `^'. The
[tab][tab]third is the `history comment' character, usually `#'.
HISTIGNORE[tab]A colon-separated list of patterns used to decide which
[tab][tab]commands should be saved on the history list.

389.

Adds a directory to the top of the directory stack, or rotates
the stack, making the new top of the stack the current working
directory. With no arguments, exchanges the top two directories.

+N[tab]Rotates the stack so that the Nth directory (counting
[tab]from the left of the list shown by `dirs', starting with
[tab]zero) is at the top.

-N[tab]Rotates the stack so that the Nth directory (counting
[tab]from the right of the list shown by `dirs', starting with
[tab]zero) is at the top.

-n[tab]suppress the normal change of directory when adding directories
[tab]to the stack, so only the stack is manipulated.

dir[tab]adds DIR to the directory stack at the top, making it the
[tab]new current working directory.

You can see the directory stack with the `dirs' command.

390.

Removes entries from the directory stack. With no arguments,
removes the top directory from the stack, and cd's to the new
top directory.

+N[tab]removes the Nth entry counting from the left of the list
[tab]shown by `dirs', starting with zero. For example: `popd +0'
[tab]removes the first directory, `popd +1' the second.

-N[tab]removes the Nth entry counting from the right of the list
[tab]shown by `dirs', starting with zero. For example: `popd -0'
[tab]removes the last directory, `popd -1' the next to last.

-n[tab]suppress the normal change of directory when removing directories
[tab]from the stack, so only the stack is manipulated.

You can see the directory stack with the `dirs' command.

391.

Display the list of currently remembered directories. Directories
find their way onto the list with the `pushd' command; you can get
back up through the list with the `popd' command.

The -l flag specifies that `dirs' should not print shorthand versions
of directories which are relative to your home directory. This means
that `~/bin' might be displayed as `/homes/bfox/bin'. The -v flag
causes `dirs' to print the directory stack with one entry per line,
prepending the directory name with its position in the stack. The -p
flag does the same thing, but the stack position is not prepended.
The -c flag clears the directory stack by deleting all of the elements.

+N[tab]displays the Nth entry counting from the left of the list shown by
[tab]dirs when invoked without options, starting with zero.

-N[tab]displays the Nth entry counting from the right of the list shown by
[tab]dirs when invoked without options, starting with zero.

392.

Toggle the values of variables controlling optional behavior.
The -s flag means to enable (set) each OPTNAME; the -u flag
unsets each OPTNAME. The -q flag suppresses output; the exit
status indicates whether each OPTNAME is set or unset. The -o
option restricts the OPTNAMEs to those defined for use with
`set -o'. With no options, or with the -p option, a list of all
settable options is displayed, with an indication of whether or
not each is set.

393.

printf formats and prints ARGUMENTS under control of the FORMAT. FORMAT
is a character string which contains three types of objects: plain
characters, which are simply copied to standard output, character escape
sequences which are converted and copied to the standard output, and
format specifications, each of which causes printing of the next successive
argument. In addition to the standard printf(1) formats, %b means to
expand backslash escape sequences in the corresponding argument, and %q
means to quote the argument in a way that can be reused as shell input.
If the -v option is supplied, the output is placed into the value of the
shell variable VAR rather than being sent to the standard output.

394.

For each NAME, specify how arguments are to be completed.
If the -p option is supplied, or if no options are supplied, existing
completion specifications are printed in a way that allows them to be
reused as input. The -r option removes a completion specification for
each NAME, or, if no NAMEs are supplied, all completion specifications.

395.

Display the possible completions depending on the options. Intended
to be used from within a shell function generating possible completions.
If the optional WORD argument is supplied, matches against WORD are
generated.