Info Catalog bash: Job Control Builtins bash: Job Control

bash: Job Control Variables

 
 7.3 Job Control Variables
 =========================
 
 'auto_resume'
      This variable controls how the shell interacts with the user and
      job control.  If this variable exists then single word simple
      commands without redirections are treated as candidates for
      resumption of an existing job.  There is no ambiguity allowed; if
      there is more than one job beginning with the string typed, then
      the most recently accessed job will be selected.  The name of a
      stopped job, in this context, is the command line used to start it.
      If this variable is set to the value 'exact', the string supplied
      must match the name of a stopped job exactly; if set to
      'substring', the string supplied needs to match a substring of the
      name of a stopped job.  The 'substring' value provides
      functionality analogous to the '%?' job ID (Job Control
      Basics).  If set to any other value, the supplied string must be
      a prefix of a stopped job's name; this provides functionality
      analogous to the '%' job ID.
 

Info Catalog bash: Job Control Builtins bash: Job Control