启动时我收到一条消息mountall: Event failed，但一切似乎都安装正常。通过详细输出，我看到以下内容：
/ is local
/proc is virtual
/sys is virtual
/sys/fs/fuse/connections is virtual
/sys/kernel/debug is virtual
/sys/kernel/security is virtual
/dev is virtual
/dev/pts is virtual
/run is virtual
/run/lock is virtual
/run/shm is virtual
/dev/xvda2 is swap
/tmp/sessions is virtual
mounting event sent for swap /dev/xvda2
mounted event handled for /
mount / [1355] exited normally
mount /proc [1358] exited normally
mount /sys [1365] exited normally
mount /sys/fs/fuse/connections [1371] exited normally
mount /sys/kernel/debug [1375] exited normally
mount /sys/kernel/security [1378] exited normally
mount /dev [1381] exited normally
mount /dev/pts [1385] exited normally
mount /run [1387] exited normally
mount /run/lock [1388] exited normally
mount /run/shm [1389] exited normally
mount /tmp/sessions [1390] exited normally
local 1/1 remote 0/0 virtual 0/11 swap 0/1
mounted event handled for /sys
local 1/1 remote 0/0 virtual 1/11 swap 0/1
mounted event handled for /sys/fs/fuse/connections
local 1/1 remote 0/0 virtual 2/11 swap 0/1
mounted event handled for /sys/kernel/security
local 1/1 remote 0/0 virtual 3/11 swap 0/1
mounted event handled for /proc
local 1/1 remote 0/0 virtual 4/11 swap 0/1
mounted event handled for /dev/pts
local 1/1 remote 0/0 virtual 5/11 swap 0/1
mounted event handled for /run/lock
local 1/1 remote 0/0 virtual 6/11 swap 0/1
mounted event handled for /run/shm
local 1/1 remote 0/0 virtual 7/11 swap 0/1
mounted event handled for /tmp/sessions
local 1/1 remote 0/0 virtual 8/11 swap 0/1
mounted event handled for /sys/kernel/debug
local 1/1 remote 0/0 virtual 9/11 swap 0/1
mounted event handled for /dev
local 1/1 remote 0/0 virtual 10/11 swap 0/1
mounting event handled for swap /dev/xvda2
activating /dev/xvda2
swapon /dev/xvda2 [1391] exited normally
mountall: Event failed
mounted event handled for /run
virtual finished
local finished
remote finished
All filesystems mounted
local 1/1 remote 0/0 virtual 11/11 swap 0/1
mounted event handled for swap /dev/xvda2
swap finished
local 1/1 remote 0/0 virtual 11/11 swap 1/1
我怎样才能确切地找出失败的原因？
输出mount -a
mount: sys already mounted or /sys busy
mount: according to mtab, sysfs is already mounted on /sys
mount: none already mounted or /dev/pts busy
mount: according to mtab, devpts is already mounted on /dev/pts
答案1
我将从 /var/log/boot.log 和 /var/log/dmesg 开始。