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Linux常用命令-113：fg
source link: https://xugaoxiang.com/2022/10/11/linux-cmds-113-fg/
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fg 命令用于将后台任务（在后台运行的或者在后台挂起的作业）放到前台来运行。与 bg 命令是相反的操作。
语法格式：fg [参数]
常用参数：
# 将任务号为1的任务移到前台来运行
fg 1Recommend
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