Installing fresh Observium (18.9.9420) (community version) on Debian 9 does not end up with a working installation. (See Observium documentation)
Only one device is added, that cannot be viewed afterwards.
Possible solution: modify the database structure after installation and before adding your devices.
Start checking if the devices_id field has an auto-increment value set and is the primary key.
One can do so by issuing following commands:
mysql>show columns from devices from observium;
mysql>show create table devices;
If the auto-increment value is missing, please add it:
mysql> use observium;
mysql> alter table devices change column device_id device_id int(11) not null auto_increment;
Easy fix, but takes some time to find out.
Some background information from the logs:
##### Software versions #####
o OS Linux 4.9.0-8-amd64 [amd64] (Debian 9.6)
o Apache 2.4.25
o PHP 7.0.33-0+deb9u1 (OPcache: DISABLED)
o Python 2.7.13
o MySQL 10.1.37-MariaDB-0+deb9u1 (extension: mysqli 5.0.12-dev)
o SNMP NET-SNMP 5.7.3
o RRDtool 1.6.0
o Fping 3.15 (IPv4 and IPv6)
##### Memory Limit #####
o PHP Unlimited
##### MySQL mode #####
o MySQL NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
##### Charset info #####
o PHP UTF-8
o MySQL utf8
##### Timezones info #####
o Date Wednesday, 15-May-19 13:35:30 CAT
o PHP +02:00
o MySQL +02:00
After making the change, please check the auto_increment value is there.
show columns from devices from observium;
Again, the internet saved my VM.
If you move around a CentOS 6.x VM, your network MAC address can change. Here is how to fix it again.
Source: How to solve “Device eth0 does not seem to be present, delaying initialization” error – OSTechNix
After updating from Linux Mint 18.3 to 19, wine stopped working. This is what was required to correct.
sudo all below commands if required
dpkg --add-architecture i386
apt-add-repository 'deb https://dl.winehq.org/wine-builds/ubuntu/ bionic main'
wget -nc https://dl.winehq.org/wine-builds/Release.key
apt-key add Release.key
Check if you do not have duplicate lines from an earlier install.
Then the final step.
apt-get install --install-recommends winehq-stable
Source: Ubuntu – WineHQ Wiki
If Linux Mint 19 (Tara) shows error during update fril 18.3.
Unknown media type in type 'all/all'
Unknown media type in type 'all/allfiles'
To fix run following with sudo user:
grep -R all/all *
in kde xml, remove the sections containing:
sudo vi packages/kde.xml
the other files showing these sections can remain untouched.
Then run following, no errors should occur
sudo update-mime-database /usr/share/mime
Source: Unknown media type in type Fix
70% of Fortune 1000 companies use Open Source Software
Compiled statistics based on 270.000.000 polls
Go Linux go!
Read the article: blog dds: 2012.03.22 – How do Big US Firms Use Open Source Software?.
Want to get started with a real OS. Here is some guide: http://matt.might.net/articles/basic-unix/
A good guide for windows and powershell users.
In the series on how the war was won:
In 5 years, Microsoft will make its windows free for end-users.
Please find an article about the number of Linux users.
It is estimated to be around 1.000.000. Read the explanation here.