Jobs

• job
  • Process that is started in the background and controlled by the terminal where it is spawned.
  • Assigned a PID (process identifier) by the kernel and, additionally, a job ID by the shell.
  • Does not hold the terminal window where it is initiated.
  • Can run multiple job simultaneously.
  • Can be brought to foreground, returned to the background, suspended, or stopped.
• job control
  • management of multiple jobs within a shell environment

commands and control sequences for administering the jobs.

• jobs
  • Shell built-in command
  • display jobs.
• bg
  • Shell built-in command
  • Move a job to the background or restart a job in the background that was suspended with Ctrl+z.
• fg
  • Shell built-in command
  • Move a job to the foreground
• Ctrl+z
  • Suspends a foreground job and allows the terminal window to be used for other purposes

jobs command

output plus sign (+) - indicates the current background job minus sign (-) - signifies the previous job. Stopped - currently suspended - can be signaled to continue their execution with bg or fg