Write access to folders /var/www/html

If you want to edit files in a folder try:

# chmod -R username:www-data yourDirectory

Could not mount shared folder on VirtualBox

Workaround: created a ssh connection with the host in Ubuntu's file manager:

ssh://192.168.0.xxx

There were many complex solutions. This is easy. The result is the same: you'll get files in and out of the box.

Screendump: Ubuntu 16.10 and partitions

During the weekend I've build a PC:

• GA-Z170N-Wifi
• Seasonic X-Series 750w Power Supply
• 8GB RAM

The OS is Ubuntu 16.10 booting from a 120GB SSD and whith /home/ on a 2TB WD harddisk.

The Moderboard in the box 

CPU

Unboxing the motherbard

Antenna, SATA-cables, shield 

The motherboard

The CPU mounted on the board

Cooler

The cooler fan mounted

Oh, and with foreground RAM. Notice the nice bokeh.

The cabinet

The cabinet and wires

Here the shield is mounted on the cabinet.

The power supply. Seasonic X.

Harddisks

The cabinet with sides mounted

The first trialboot. Linux Mint worked from a DVD. But not on the harddrive.

Ubuntu ran like a charm.

The finished PC. Booted with Linux. To the left my trusty work laptop.

All systems up and running. Alertlevel Green.

Linux

Trying to config a new PC. Linux runs from a DVD, but the Mint / Ubuntu install crashes. I've tried all sorts of UEFI enable, diable and what not. Now I'm trying another distro: Ubuntu Studio.

Linux Mint kept crashing.

So I turned to Ubuntu 16.10. Noproblemo. Everything worked. However I did not set up the 2TB backup drive yet. That's for tomorrow.

The plan is to move /home/ to the 2GB drive.

Solution: drop mint, use Ubuntu 16.10

Make /var/www/html/ writable

From the history:

 76  sudo gpasswd -a "per" www-data
   77  sudo chown -R "$USER":www-data /var/www
   78  find /var/www -type f -exec chmod 0660 {} \;
   79  sudo find /var/www -type d -exec chmod 2770 {} \;
   80  touch x
   81  rm x

Line 80 - 81 is just a test. 

WordPress Localhost 404 errors

I had to change /etc/apache2/apache2.conf file. In these lines None were changed to All:

Speed Up Mint

I have used two simple steps:

• Cinnamon: disable all visual effects
• Install the MATE Desktop: good for old PCs

After a few minutes with MATE my reaction was: why on earth didn't I change before ...

Where is the anacrontab log?

You can access the anacrontab like this:

awk '/anacron/' /var/log/syslog | less

Result:

root@Odin:~# awk '/anacron/' /var/log/syslog
Nov 21 08:11:58 Odin anacron[877]: Job `cron.daily' terminated
Nov 21 08:11:58 Odin anacron[877]: Normal exit (1 job run)
Nov 21 18:42:13 Odin systemd[1]: Started Run anacron jobs.
Nov 21 18:42:13 Odin anacron[845]: Anacron 2.3 started on 2016-11-21
Nov 21 18:42:13 Odin anacron[845]: Normal exit (0 jobs run)
Nov 21 20:38:31 Odin systemd[1]: Started Run anacron jobs.
Nov 21 20:38:31 Odin anacron[770]: Anacron 2.3 started on 2016-11-21
Nov 21 20:38:31 Odin anacron[770]: Will run job `db.backup' in 60 min.
Nov 21 20:38:31 Odin anacron[770]: Will run job `daglig.backup' in 200 min.
Nov 21 20:38:31 Odin anacron[770]: Jobs will be executed sequentially
Nov 21 21:05:50 Odin systemd[1]: Started Run anacron jobs.
Nov 21 21:05:50 Odin anacron[833]: Anacron 2.3 started on 2016-11-21
Nov 21 21:05:50 Odin anacron[833]: Will run job `test' in 1 min.
Nov 21 21:05:50 Odin anacron[833]: Will run job `db.backup' in 60 min.
Nov 21 21:05:50 Odin anacron[833]: Will run job `daglig.backup' in 200 min.
Nov 21 21:05:50 Odin anacron[833]: Jobs will be executed sequentially
Nov 21 20:07:06 Odin anacron[833]: Job `test' started
Nov 21 20:07:06 Odin anacron[833]: Job `test' terminated
Nov 21 22:05:50 Odin anacron[833]: Job `db.backup' started

Nov 21 22:05:50 Odin anacron[833]: Job `db.backup' terminated

Test anacrontab

Edit the anacrontab file:

nano /etc/anacrontab

Write this line:

1 1 test echo "anacron okidoki" > /home/yourUserName/anacron.log

Reboot. Wait one minute. If you see the file anacron.log in your home directory, you know that anacrontab runs.

Python Random

import random
print random.randrange(1,27)

Linux: Sound Recorder in Bash

This file is made for my research project "What You Should Know About WordPress". I need to record a series of semistructured interviews. So I needed something as simple as a soundrecorder. That's a job for bash:

#!/bin/bash

# Record interview
# Encode as MP3

# User Input
echo "I'll record sound and save the file as MP3"
echo "What is the name of your file? (Remember: .mp3)"
read filename

# Record and encode
arecord -v -f cd -t raw | lame -r - $filename

Mount H: on Windows shares

# sudo apt get install samba-client samba-common cifs-utils
# mount -t auto -o user=XXXX //server

MS Lumia Phone

My new work phone is MS Lumia. I've never tried MS in the role as a mobile. Now the battery is loading, and I wait for some apps to download. Only 3 reboots was necsessary in order to use the thing.

Setting up Outlook was easy, but I had to ignore several "helpfull" suggestions about getting a MS account. No thanx.

A nice feature is the watch when the screen is blank.

MS Lumia Phone

My new work phone is MS Lumia. I've never tried MS in the role as a mobile. Now the battery is loading, and I wait for some apps to download. Only one reboot was necsessary.

Raspberry Pi B+

Use a USB to mini-USB cable as a power supply between TV (or similar) and Pi.

Webp and Linux

Install the package webp:

# sudo apt-get install webp

Now you can convert image files with cwebp:

# cweb file.png -o file.webp

Or decompress via dwebp.

Windows improved

Today's work on a Windows system was pleasant. W10 is a great improvement. But I still prefer Linux.

Tex to Docx

So you want to translate .tex to .dex? It's easy. Use pandoc:

# /home/per/Dropbox/ddfo/sit_lux/synopsis.tex

Cannot connect to Philips Hue

For some reason Philips Hue cannot get an ip-address it seems. So the system is basicly useless. I have tried several reboots of the router, the Hue thing etc. Nothing has helped so har.

I suspect an error because my Android phone wants the same IP. However if I turn off the phone and boot from rock bottom there is only light in two LEDs.

Synchroniz Tomboy Notes

If you have more than one computer: save the notes on Dropbox. Then synchronize your systems with that folder. It works like a charm.

Docx - cannot print properly from Linux

Skyprinting from Linux or Windows does not give the same result. I'm not printing from Libre Office. I just upload the file from the directory. My conclusion: .docx is not an open format at all. You have to print from Windows.

Latex and Your Organization

As a researcher and author it's obvious to write in the Latex format. But when you hand in your work, you often have to downscale to some MS Word .docx template. I can do it. But I don't love .docx.

Lyx Debugging

Getting an error in Lyx is pretty normal. That is when you try to compile to .dvi or .pdf. But how can you edit an error in myfile.lyx in line 666? From inside Lyx it's not possible to edit the source. As far as I know, that is.

So, the quick a dirty solution is:

1. Get out of the file in Lyx.
2. Open the file in your favorite editor (vi, nano, gedit ... etc.)
3. Go to the line with an error. 
4. Fix or remove whatever seems wrong. 
5. Save and open the file in Lyx again.
6. Compile ... and hope for the best.

Sometimes the error may have it's origin from a bibtex file. Same recipe here.