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
Seems netbeans cannot work with OpenJDK 10/11 and stops silently shortly after start.
uninstall 8.1 from software list and/or remove manual installation from /usr/local
Install OpenJDK 1.8
Download latest 8.2 from netbeans.org.
Install Netbeans 8.2 in current user (aka path /home/youruser). Also install Glassfish/Tomcat in current user. For some reason, installation in /usr/local does fail.
During installation, point your java jdk to /usr/lib/jvm/openjdk-1.8.
Please note that editing the /etc/netbeans.conf file as indicated by some sites is not resolving the issue.
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
Why UNIX. Because the way it is designed in Windows is all but design.
File extension madness, Windows Vista / 7 style – virtualdub.org.
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.