From VirtualBox to VmWare VM

export vm from VirtualBox

convert vm into VmWare format

edit ovf file to change virtual system type:

from <vssd:VirtualSystemType>virtualbox-2.2</vssd:VirtualSystemType>

to <vssd:VirtualSystemType>vmx-07</vssd:VirtualSystemType>

edit ovf file to update SATA controller with a SCSI controller:



remove file “”

import now vmdk into ESXi and after use SSH to access into shell. Now convert vmdk into ESXi format using:

after use vi editor to edit disk

to update ddb.adapterType from ide to lsilogic:

During boot you need to regenerate initramfs (in CentOS or Red Hat) using rescue kernel configuration and launch dracut command:

after install vmware tools but first you need to install dependencies



Get x509 certificate from website

you can use it as follow:

to generate google_certificate.crt


use git repo

install common dependencies

for Nemo copy relative extension

RabbitVCS Nemo extension require some packages:

for Thunar copy relative extension

RabbitVCS Thunar extension require some packages:

for Nautilus copy relative extension

RabbitVCS Nautilus extension require some packages:

for Caja copy relative extension (still not working)

RabbitVCS Caja extension require some packages:

OBS Studio on Mageia 7 with nvenc

obtain ffmpeg nv codec headers:

edit Makefile to use /usr as PREFIX and lib64 as LIBDIR instead /usr/local and lib, after build and install with:

now install dependencies:

after get package from|updates and edit spec file to add –enable-nvenc after remove sdl in BuildRequires and rebuild

remove tained packages already installed with:

after install packages without static-devel, debugsource and debuginfo packages




in Mageia 6 instead you need only to:


Add a certificate authority (CA) certificate to jdk cacerts

We need to have ca certificate in der format, so if we have a my-ca.crt pem format ca certificate we need to convert it using:

openssl x509 -in my-ca.crt -inform pem -out my-ca.der -outform der

So to have list of already added certificates to jdk cacerts, we can use:

keytool -v -list -keystore /usr/lib/jvm/java/jre/lib/security/cacerts
default keystore password is: changeit

Keystore path could be different (es: /etc/pki/java/cacerts).

To import ca certificate use:

keytool -importcert -alias local-CA -keystore /usr/lib/jvm/java/jre/lib/security/cacerts -file my-ca.der


Xterm change look

use file ~/.Xresources as follow

to reload config restart X session or use

Config docker behind proxy on CentOS 7

After install docker need to add ca certificate to CentOS 7 copy ca certificates into

after than use follow command to update certificates
# update-ca-trust

now add proxy settings into docker config file /etc/sysconfig/docker as follow

for sudo without password add row indo /etc/sudoers
[USER] ALL=(ALL) NOPASSWD: /usr/bin/docker

configure docker engine to start at boot:
systemctl enable docker
systemctl restart docker

Gradle behind proxy

update build.gradle project file adding http repositories

update also with http url instead https

if required set also http proxy in ~/.gradle/