jobs用法问题 (job -x 怎么用?)

jobs用法问题 (job -x 怎么用?)

jobs -x command [ args ... ]
If the -x option is supplied, jobs replaces any jobspec found in
command  or  args  with  the corresponding process group ID, and
executes command passing it args, returning its exit status.
解释看不懂,但经过试验,jobs -x command [ args ... ]就是产生一个新的作业,不知是否是这样。      
for example:
复制内容到剪贴板
代码:
[color=blue]-(user@host:tty)-(tmp)-
[350 0] %[/color] sleep 120 &
[1] [color=red]7784[/color]
[color=blue]-(user@host:tty)-(tmp)-
[350 0] %[/color] sleep 120 &
[2] [color=purple]7785[/color]
[color=blue]-(user@host:tty)-(tmp)-
[350 0] %[/color] sleep 120 &
[3] [color=green]7786[/color]
[color=blue]-(user@host:tty)-(tmp)-
[350 0] %[/color] jobs -x echo %3 %2 %1
[color=green]7786[/color] [color=purple]7785[/color] [color=red]7784[/color]
[color=blue]-(user@host:tty)-(tmp)-
[350 0] %[/color]
      
太神奇了!谢谢!      
[QUOTE=TUDOU01]太神奇了!谢谢![/QUOTE]
:)