Ao reformatar uma máquina com o Ubuntu para instalar outra versão do zero, um dos seus maior desafios é o de ter que reinstalar todas as aplicações, utilitários e ferramentas novamente. Existem vários programas e scripts que se propõem a fazer isso, veja o opção do APTIK Backup no link:
FERRAMENTAS LINUX: Aptik Backup dos seus temas, PPA e pacotes
segunda-feira, 2 de novembro de 2015
quinta-feira, 16 de julho de 2015
You can solve this (for Debian based Linux distros) by making packages using "java-package" a few times (for various architectures), then distributing them internally.
If you don't have it installed open a console and type:
sudo apt-get install java-package
The big plus side is that this method always works; no matter how crazy Oracle's web pages become. Oracle can no longer break my build or stop my work, specially when Internet-banking depends on it!
The downside is that it's a bit more work to set up initially.
STEP-BY-STEP (ie. as the old music goes...)
1. Download the tar.gz files manually using your browser (ie. thus "accepting" their terms)
2. Run at prompt command:
this will create a file named: "oracle-javaX-jXX_X_XXX.deb"
Note that you may get some messages during the make-jpkg, just ignore them.
3. Distribute it within your organization (or your family devices)
For distribution over the Internet, I suggest using a password protected apt repository or provide raw packages using symmetric encryption:
passphrase="Hard to crack string. Use /dev/urandom for inspiration."
gpg --batch --symmetric --force-mdc --passphrase-fd 0 \
oracle-javaX-jXX_X_XXX.deb <<< "$passphrase"
Of course providing (unencrypted) .deb packages on the internet is probably a violation of your license agreement with Oracle, which states:
... Oracle grants you a ... license ... to reproduce and use internally the Software complete and unmodified for the sole purpose of running Programs"
On the receiving end, if you have a password protected apt repo, all you need to do is apt-get install it. If you have raw packages, download, decrypt and dpkg -i them.
Works like a charm!
sábado, 11 de julho de 2015
Raspberry Pi 2 has 1,024MB RAM that is partitioned between the CPU and the GPU. If the Pi is working as a headless server or the Pi desktop is being accessed via VNC (which doesn't utilize the GPU) the memory split between the two processors can be altered to assign more memory to the CPU for running applications.
- Default GPU memory on Raspbian is set to 64MB and the
minimum recommended to ensure proper operation is 16MB.
- Pi Camera Module requires a minimum of 128MB
- Kodi Media center
requires a minimum of 256MB RAM for the GPU, to avoid choppy video
- edit /boot/config.txt and set gpu_mem=256;or
- run sudo raspi-config and select
option 8 Advanced Options -> A3 Memory Split
and modify value to 256
quinta-feira, 12 de fevereiro de 2015
Can't remote access lubuntu server with Vino but can ssh it.
You open a ssh tunnel (map remote 5900 port to local 12345 port) of remote lubuntu station (ex: 188.8.131.52) at terminal client side to remote access lubuntu station.
Example to type at cmd prompt:
ssh -L 12345:localhost:5900 firstname.lastname@example.org
note: change "user" and address (184.108.40.206) with your own ID.
You open a second terminal window at client station to start vnc with cmd:
Error msg client side:
xvncviewer: VNC server closed connection
Error msg server (the ssh terminal) side:
channel 3: open failed: connect failed: Connection refused
Vino-server not running
At cmd prompt type (remote server side):
Connected to RFB server, using protocol version 3.7
Server did not offer supported security type
server encryption scheme not understood client side
At the remote lubuntu server side set encryption variable to false
cmd prompt type:
gsettings set org.gnome.Vino require-encyption false