#hoopla

I tried to configure an NTP server within a closed network without internet connection and make many clients synchronize with it (server and clients all on Ubuntu 16.04). Recipe:

• Install ntp on all nodes (ntpdate is not needed and should either be deinstalled or at least not be started)

• On the server: remove external NTP servers and make NTP use the local time. My /etc/ntp.conf only contains:

  server 127.127.1.0
  fudge 127.127.1.0 stratum 9
  

• service ntp restart; ntpq -p should give something like

       remote           refid      st t when poll reach   delay   offset  jitter
  ==============================================================================
  *LOCAL(0)        .LOCL.           9 l    4   64  377    0.000    0.000   0.000
  

• On the clients: My /etc/ntp.conf only contains:

  server NTP-SERVER iburst prefer
  

• service ntp restart; ntpq -p should give something like

       remote           refid      st t when poll reach   delay   offset  jitter
  ==============================================================================
   NTP-SERVER          .INIT.          16 u   31   64    0    0.000    0.000   0.000
  

I changed the hosting of my B2Evo blog to SSL. The only necessary configuration change was the $baseurl in conf/_basic_config.php. But there remained an issue with mixed content. Images of posts were still rendered by http, because the image links are hard-coded in the database. The following query helped:

UPDATE evo_items__item 
set post_content = REPLACE(post_content, 'http://www.fabianfier.de', 
'https://www.fabianfier.de') 
where post_content LIKE '%http://www.fabianfier.de%';

#tar cfvz xyz.tar.gz xyz 
tar (child): xyz.tar.gz: Cannot open: Disk quota exceeded
tar (child): Error is not recoverable: exiting now

HAHA: This machine pretends to use roughly twice as much inodes as the datatype long AND it says it has 500k free inodes:

# df -i
Filesystem                   Inodes                IUsed     IFree IUse% Mounted on
/dev/vzfs      18446744069909905553 18446744069415334917 494570636  100% /

#rm -rf xyz

Minutes(!) later:

#df -i
Filesystem     Inodes IUsed  IFree IUse% Mounted on
/dev/vzfs      750000 45285 704715    7% /

Within a controller I tried to redirect the user by return $this->redirect($this->generateUrl('...'));, but I couldn't find the corresponding route name. I did not define any baseroutepattern or baseroutename in the Admin file. In order to find out the route name, locate the service entry for the corresponding admin in admin.yml and copy the service name. On the terminal, type bin/console sonata:admin:explain and paste the service name to the end of the command. This command shows all routes associated with the service which can be used in generateUrl().

After updating from Windows 7 to 10, the computer randomly hung after 5 to 10 minutes. Numlock on the keyboard still reacted, but the mouse froze and Ctrl-Alt-Del didn't do anything. Rebooting was only possible by cold reset. Running hwinfo reproducably made the machine hang on starting the program at scanning the drives. In the Windows logs there was nothing helpful. The CPU temperatures did not show anything unusual. I figured the issue was most likely driver- or firmware-related or due to a hardware defect.

I performed the following steps which were probably not successful or neccessary:

• Cleaning CPU fans and heatsink
• Updating drivers of the (very high-end) graphic card
• Exchanging the graphic card
• Updating the BIOS
• Updating the SSD firmware

I suspect one or more of the following driver updates (Download at http://www.asrock.com/mb/Intel/Z87%20Pro4/?cat=Download&os=Win1064) to have contributed to solving the problem:

• INF driver
• Intel Rapid Storage Technology driver and utility
• Intel Smart Connect driver
• Intel Management Engine driver