我运行的是 Ubuntu 18.04。当我跑步时：
ls -la /var
我得到以下信息：
drwxr-xr-x 10 root root 4096 Jan 2 15:46 .
drwxr-xr-x 27 root root 4096 Jan 15 06:25 ..
drwxr-xr-x 10 root root 4096 Jan 6 06:15 cache
drwxrwxrwt 2 root root 4096 Jan 12 06:41 crash
drwxr-xr-x 25 root root 4096 Jan 4 11:06 Lib
lrwxrwxrwx 1 root root 11 Dec 27 07:22 lock -> ../run/lock
drwxrwxr-x 8 root syslog 4096 Jan 10 06:06 log
drwx------ 6 root root 4096 Jan 15 06:03 …