操作：
循环覆盖向tmp 文件写入坐标
tmp:
-45.6976089525,-26.1528715421,-0.0188627654187
报错如下：
-15.2517398838,-5.1216965666,1.62749776805tail: /opt/xxx/tmp: file truncated
解决：
tail -f -n 1 /opt/xxx/tmp
标签：tmp,truncated,xxx,tail,报错,file
来源： https://www.cnblogs.com/sea-stream/p/10773624.html