I couldn't help posting this ... because its symptomatic of my experience with learning Linux on my own ...

It all started because i noticed this message when shutting down :

apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName

the webserver was running fine, there was nothing to worry about, but it was annoying - so i start searching for a fix.

Unfortunately couldnt find any ... the google search returned many entries for this error - and was confusing even more.

Until i found the most stupid fix there is :

sudo vi /etc/apache2/httpd.conf

and I just added at the end of the file

ServerName localhost

And that was it !

There's still a funny issue, with my HP laptop nx6310's acpi :
The battery status stops updating ; which mean the status is accurate just after boot, but wouldnt change later.

The funny part is that if I physically remove the battery, and put it back a few seconds later - the problem is solved for the next reboot (battery status is accurate, and updated) - but that only last until I power off...

Same as that old bug :
https://bugs.launchpad.net/ubuntu/dapper/+source/linux-source-2.6.15/+bug/47561

I start to think that might be an issue wit HP laptop (serie nc/nx) acpi management ?

I'm using "du -mc" to get the size of each directory. But then i'm trying to limit that list to one level deep.
But i couldnt find the proper grep syntax to do that.

Filtering the du -mc output to echo only lines that has one slash, would do the trick ... but how ?!

du -mc | grep "/"

the last command isnt filtering anything (obviously)
And man grep gives cryptic help on the subject :

       A regular expression may be followed by one of several repetition oper-
       ators:
       ?      The preceding item is optional and matched at most once.
       *      The preceding item will be matched zero or more times.
       +      The preceding item will be matched one or more times.
       {n}    The preceding item is matched exactly n times.
       {n,}   The preceding item is matched n or more times.
       {n,m}  The  preceding  item  is	matched at least n times, but not more
	      than m times.

i've tried

du -mc | grep "/"{1}

but doesnt output anything at all, then

Yesterday, i've done some troubleshooting ... it seems that the culprit for the whole hibernate episode is the touchpad. On the login window,i pressed ctrl+alt+f1 entering the console in text mode (i thougt reducing the environment to a minimum (no graphic interface) was a good start ! then i forced the sleeping on every 10 seconds

sleepd -u 10 

Waited and suddenly the lcd went black, and resumed instantly with this message "synaptics reset failed" twice and some details on the driver. [...]

found a few useful information on the hibernate issue - there's the :

acpi -V
    Battery 1: discharging, 93%, 02:35:29 remaining
    Thermal 1: ok, 45.0 degrees C
    Thermal 2: ok, 48.0 degrees C
    Thermal 3: ok, 32.0 degrees C
    Thermal 4: ok, 22.0 degrees C
    Thermal 5: ok, 0.0 degrees C
 AC Adapter 1: off-line

that gives useful info on the battery level
and as well when launching :

hibernate -v3


i receive among other info this msg :
hibernate: Trying method in suspend2.conf...
hibernate: Trying method in disk.conf...
hibernate: Trying method in ususpend-disk.conf...
hibernate: Including configuration from common.conf
hibernate: [01] Executing CheckLastResume ...
hibernate: [01] Executing CheckRunlevel ...
hibernate: [01] Executing LockFileGet ...
hibernate: [01] Executing NewKernelFileCheck ...
hibernate: [10] Executing EnsureUSuspendCapable ...
hibernate: [11] Executing XHacksSuspendHook1 ...
hibernate: [59] Executing RemountXFSBootRO ...
hibernate: [89] Executing SaveKernelModprobe ...
Saved /proc/sys/kernel/modprobe is /sbin/modprobe
hibernate: [91] Executing ModulesUnloadBlacklist ...
Unloading blacklisted modules listed /etc/hibernate/blacklisted-modules
Module version for ipw2100 is 2
Module version for ipw2200 is 2
Unloading blacklisted module psmouse (and dependencies)
Unloading psmouse ...
Unloading blacklisted module button (and dependencies)
Unloading button ...
Module version for ndiswrapper is
hibernate: [95] Executing XHacksSuspendHook2 ...
xhacks: changing console from 7 to 15
hibernate: [98] Executing CheckRunlevel ...
hibernate: [99] Executing DoUSuspend ...
hibernate: Running /usr/sbin/s2disk ...
suspend: Could not stat the resume device file
hibernate: [90] Executing ModulesLoad ...
Loading module psmouse (from auto)...
Loading module button (from auto)...
hibernate: [89] Executing RestoreKernelModprobe ...
hibernate: [85] Executing XHacksResumeHook2 ...
xhacks: changing console back to 7
hibernate: [70] Executing ClockRestore ...
hibernate: [59] Executing RemountXFSBootRW ...
hibernate: [11] Executing XHacksResumeHook1 ...
hibernate: [01] Executing NoteLastResume ... 
hibernate: [01] Executing LockFilePut ...

there is also another method to put the unit on sleep mode
its the s2ram

s2ram
Machine is unknown.
This machine can be identified by:
   sys_vendor   = "Hewlett-Packard"
   sys_product  = "HP Compaq nx6310 (RH322EA#AKB)"
   sys_version  = "F.08"
   bios_version = "68YDU Ver. F.08"
See http://en.opensuse.org/S2ram for details.

* so i manage to put the unit in a sleep mode with this, but couldnt resume afterward ... had to hard reset the laptop. i'm currently following this page http://en.opensuse.org/S2ram trying the various options ...

    * s2ram -f -a 1 
    * s2ram -f -a 2
    * s2ram -f -a 3
    * s2ram -f -p -m
    * s2ram -f -p -s
    * s2ram -f -m
    * s2ram -f -s
    * s2ram -f -p
    * s2ram -f -a 1 -m
    * s2ram -f -a 1 -s 

[...]

install still in progress Apache2 is working fine the trick was to find that file in /etc/default/apache2

# 0 = start on boot; 1 = don't start on boot
NO_START=0

and set the flag to 0

on the power management side - no change but i will need some help the laptop (nx6310 HP) current behavior is :

- running full speed all the time (even with the lid closed)
- xfce battery indicator update when charging otherwise 
 only when logout/login or after reboot ?! (not sure)
- when the battery is depleted the laptop suddenly shutdown

i found a hibernate, suspend2, and so on but at the most i have a blink on the video and everything is back as normal.

NB : suspend2 requires a specific partition to write 
down memory's content !
so if i cant find a tool to rewrite the partitions without wiping
the current partition - i will have to reinstall from scratch ...
not sure about all that - its just my guess ... so far

notes :
Installation progress on nx6310 HP
. installed xcfe
. goodies are great for battery indicator
. but power management - nothing work as i was expecting 
. soundcard fine - installed alsa and pressed M on alsamixer to toggle off to on ;) 
. scite is a great editor

Still pending
. timezone is incorrect 
. battery management / power management (hibernate mode)

[ ... ]