Shell Options (BashStyle-NG user documentation)

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## 9 Shell Options

In this category you’ll find various Bash builtin options (shopts) that alter how Bash behaves in different cases.

### Bash 3.x

Setting: histappend ¶

  When saving the Bash history to $HISTFILE upon Bash exit, the new history entries will be appended to the existing file rather than overwriting it.

Setting: cdspell ¶

  This corrects minor errors in the spelling of a directory component in a `cd` command. The errors checked for are transposed characters, a missing character, and one character too many.

Setting: cdable vars ¶

  An argument to the cd builtin command that is not a directory is assumed to be the name of a variable whose value is the directory to change to.

Setting: checkhash ¶

  Lets Bash check that a command found in the hash table exists before trying to execute it. If a hashed command no longer exists, a normal path search is performed.

Setting: cmdhist ¶

  When saving History entries try to store multi-line commands in one line.

Setting: force fignore ¶

  Ignore all files from completion whichs suffixes are defined in $FIGNORE environment variable. This is enabled by default.

Setting: histreedit ¶

  The user is given the opportunity to re-edit a failed history substitution.

Setting: no empty cmd completion ¶

  When attempting completion on and empty command line, no completion based on the $PATH variable is done.

Setting: dotglob ¶

  When attempting file- or pathname completion include hidden matches (with leading dot).

Setting: extglob ¶

  Enable extended pattern matching features.

Setting: nocaseglob ¶

  When set file- or pathname expansion is done case insensitive.

Setting: nocasematch ¶

  When set pattern matching in `case` or `[[` conditional commands is done case insensitive.

### Bash 4.x

Setting: autocd ¶

  When the given command is the name of a directory `cd` into it, instead of executing a command of the same name.

Setting: dirspell ¶

  When set bash tries to correct minor spelling mistakes on directory names. For example `cd /hoem/` will successfully result in `cd /home/`.

Setting: globstar ¶

  When set the `**` glob will match all files, directories and subdirectories, the `**/` glob will match all directories and subdirectories, but no files.

Setting: checkjobs ¶

  Before exiting bash show the status of currently running background jobs. If there are any, the exit is delayed until a second attempt to prevent accidentally killing running jobs.

### Bash 4.3

Setting: direxpand ¶

  When set bash tries to expand pathnames from variables upon [TAB].

Setting: glob ascii ranges ¶

  When set range expressions for patterng matching behave like in the `C` locale.

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