bg 将程序放在后台执行
例a,将程序放在后台执行
[root@localhost ~]# ping localhost -a >/dev/null & [1] 1762 [root@localhost ~]# ping 127.0.0.1 -a >/dev/null & [2] 1763 [root@localhost ~]# fg 1 ping localhost -a > /dev/null ^Z [1]+ 已停止 ping localhost -a > /dev/null [root@localhost ~]# jobs [1]+ 已停止 ping localhost -a > /dev/null [2]- 运行中 ping 127.0.0.1 -a > /dev/null & [root@localhost ~]# bg 1 [1]+ ping localhost -a > /dev/null & [root@localhost ~]# jobs [1]- 运行中 ping localhost -a > /dev/null & [2]+ 运行中 ping 127.0.0.1 -a > /dev/null &
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