debian users/uptime

[void]

hallo!

habe auf einem server ein ungewöhnliches phänomen festgestellt:
unter "uptime" werden 2 users angegeben, unter "users" aber nur 1 - wo ist der 2. user hin??

"chkrootkit" liefert

Searching for suspicious files and dirs, it may take a while...
/usr/lib/jvm/.java-1.5.0-sun.jinfo
/usr/lib/jvm/java-1.5.0-sun-1.5.0.10/.systemPrefs
/usr/lib/jvm/.java-gcj.jinfo
/lib/init/rw/.ramfs

Searching for OBSD rk v1... /usr/lib/security
/usr/lib/security/classpath.security

"rkhunter"

* Filesystem checks
   Checking /dev for suspicious files...                      [ OK ]
   Scanning for hidden files...                               [ Warning! ]
---------------
/etc/.pwd.lock
/etc/.java /dev/.static
/dev/.udev
/dev/.initramfs
/dev/.initramfs-tools
---------------
Please inspect:  /etc/.java (directory)  /dev/.static (directory)  /dev/.udev (directory)  /dev/.initramfs (directory)

* Check: SSH
   Searching for sshd_config...
   Found /etc/ssh/sshd_config
   Checking for allowed root login... Watch out Root login possible. Possible risk!
    info: "PermitRootLogin yes" found in file /etc/ssh/sshd_config
    Hint: See logfile for more information about this issue
   Checking for allowed protocols...                          [ OK (Only SSH2 allowed) ]

muss ich mir sorgen machen??