linux - 一次运行所有基本命令，然后在它们全部完成后依次运行

Question

我将如何运行如下几个命令，以便在完成所有后台命令后执行（清理）最后一行？

echo "oyoy 1" > file1 &
echo "yoyoyo 2" > file2 &
rm -f file1 file2

当然，回显命令对我来说是不同的，并且需要很长时间才能完成（我可以手动删除文件或使用我知道的另一个脚本，但我想知道如何在一个脚本中完成此操作..）

谢谢！

Answer 1

从文档

 wait [n ...]
      Wait  for each specified process and return its termination sta-
      tus.  Each n may be a process ID or a job  specification;  if  a
      job  spec  is  given,  all  processes in that job's pipeline are
      waited for.  If n is not given, all currently active child  pro-
      cesses  are  waited  for,  and  the return status is zero.  If n
      specifies a non-existent process or job, the  return  status  is
      127.   Otherwise,  the  return  status is the exit status of the
      last process or job waited for.

所以你可以像这样等待后台进程完成：

echo "oyoy 1" > file1 &
echo "yoyoyo 2" > file2 &
wait
rm -f file1 file2

Answer 2

或者，如果您正在运行一堆东西，并且您只需要等待几个进程完成，您可以存储一个 pid 列表，然后只等待那些。

echo "This is going to take forever" > file1 &
mypids=$!
echo "I don't care when this finishes" > tmpfile &
echo "This is going to take forever also" >file2 &
mypids="$mypids $!"
wait $mypids