[Howto] create PostgreSQL database with UTF-8 encoding
postgreSQL v9.6 CREATE DATABASE testdb ENCODING ‘utf8’ LC_COLLATE ‘de_DE.UTF-8’ LC_CTYPE ‘de_DE.UTF-8’ TEMPLATE template0;
[Howto] resolve Virtualbox error message ‘the device helper structure has changed’
if you’ve upgraded virtualbox and afterwards you can’t start the vm’s, because of the error ‘the device helper structure has changed’, you must reinstall/update your virtualbox extension pack. Run as root the following command: vboxmanage extpack install –replace ‘new-extpack-file’
[Howto] resolve error message Virtualbox ‘Kernel driver not installed (rc=-1908)’
Error message: Kernel driver not installed (rc=-1908) The VirtualBox Linux kernel driver (vboxdrv) is either not loaded or there is a permission problem with /dev/vboxdrv. Please reinstall virtualbox-dkms package and load the kernel module by executing ‘modprobe vboxdrv’ as root. … Continued
[Howto] bond network cards in Debian Linux (LACP)
If you want to add a bonded interface in Debian Linux, you don’t need the package ifenslave anymore. You can create/modify/delete the bonded interface completly through sysfs. at first load the required bonding-driver into kernel: modprobe ‘bonding’ create a … Continued
[Howto] resize (extend) a Virtualbox vdi image
Use the following Virtualbox command in your shell: (you must specifiy the target size in MB, for example 200 GB = 200000) VBoxManage modifymedium image.vdi –resize 200000 tested with: Virtualbox Version 5.0.24_Debian
[Howto] convert with Virtualbox from vmdk to vdi
Use the following Virtualbox command in your shell: VBoxManage clonehd old-file.vmdk converted-file.vdi –format VDI tested with: Virtualbox Version 5.0.24_Debian
[Howto] add menu entry in lxpanel (LXDE Desktop)
every menu entry is a text file with the suffix “.desktop“ example.desktop [space_20] the menu entries are located in two different folders: for all users (global): /usr/share/applications (note: you need root-privileges to edit this folder) for local user (local): ~/.local/share/applications … Continued
[Howto] enable direct updates in wordpress (disable ftp updates)
If you want to update wordpress themes or plugins and you are automatically redirected to the ftp-download-page, you can manually force wordpress to go in maintenance-mode and to download and update directly. For this you have to put the following … Continued
[Howto] bash script for gcc command (with custom path to GTK+ header-files and libraries)
#!/bin/bash gcc main.c -o main -I/usr/include/gtk-3.0/ \ -I/usr/include/glib-2.0/ \ -I/usr/lib/x86_64-linux-gnu/glib-2.0/include/ \ -I/usr/include/pango-1.0/ \ -I/usr/include/cairo/ \ -I/usr/include/gdk-pixbuf-2.0/ \ -I/usr/include/atk-1.0/ \ \ -L/usr/lib/x86_64-linux-gnu \ \ -lgtk-3 \ -lgobject-2.0
[Howto] send a syslog message manually
the following commands send a syslog-message to the syslog-daemon with the syslog-facility=auth and syslog-priority=info: #to localhost’s syslog-daemon logger -p auth.info <message> #to a remote syslog-daemon logger -h <IP> -P <Port> -p auth.info <message>