adb 调试一直报错 $ adb shell error: device offline 解决办法: $ adb kill-server $ adb start-server * daemon not running. starting it now on port * * daemon started successfully *
在做umount设备时, device is busy是令人头痛的提示: [root@delphi /]# umount /dev/cdrom umount: /mnt/cdrom: device is busy. (In some cases useful info about processes that use the device is found by lsof() or )) lsof可以找出被特定进程所打开的文件,目录,套接字,设备. 例子:比如有时我们不能umount掉一个分区时