命令fg在Unix与类Unix系统中属于作业控制命令，其功能是唤醒挂起的进程将之移至前台（因而同时会将进程的输入输出流移至用户终端）继续执行[1]。操作系统内是否包含fg命令亦是“POSIX兼容”的判断标准之一[2] 。
参见
参考资料
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