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fg.md 1.10 KB

一键复制编辑原始数据按行查看历史

提交于 6年前 . Update fg.md

fg

fg

将后台作业移动到前台终端运行

概要

fg [job_spec ...]

主要用途

用于将后台作业（在后台运行的或者在后台挂起的作业）放到前台终端运行。
若后台任务中只有一个，则使用该命令时可以省略任务号。

参数

job_spec（可选）：指定要移动到前台执行的作业标识符，可以是一到多个。

返回值

返回作业的执行状态，如果发生了错误返回失败。

例子

# 运行sleep命令，然后按下ctrl+z。
sleep 60
^Z
[1]+  Stopped                 sleep 60

# 使用fg命令使得作业在前台运行。
fg %1

# 返回信息：
sleep 60

注意

bash的作业控制命令包括bg fg kill wait disown suspend。
该命令需要set选项monitor处于开启状态时才能执行；查看作业控制状态：输入set -o查看monitor行；执行set -o monitor或set -m开启该选项。
该命令是bash内建命令，相关的帮助信息请查看help命令。

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