Tekhoow

As I do maintain multiple wordpress site that share common source code, the easiest for me was to install a wordpress multisite locally. Assuming you managed to install lamp and wordpress, these are the additional step needed before enabling multisite Activate the apache Mod_Rewrite module: $ sudo a2enmod rewrite Allow .htaccess changes in the virtual file. Open your default virtual host file (assumed). $ sudo gedit /etc/apache2/sites-enabled/000-default In the Directory section, change AllowOverride to All: <Directory /var/www/>                 Options Indexes FollowSymLinks MultiViews                 AllowOverride All                 Order allow,deny                 allow from all </Directory>

Summary of the command line to use $ sudo apt-get install npm nodejs $ sudo npm install bower -g $ ln -s /usr/bin/nodejs /usr/bin/node Explanation You need both nodejs and npm $ sudo apt-get install npm nodejs Then you can install bower $ sudo npm install bower -g Quick check $ bower --version You might get /usr/bin/env: node: No such file or directory which you solve using $ ln -s /usr/bin/nodejs /usr/bin/node Quick check again $ bower --version 1.3.12 Yeah!

After trying to run google cloud hello world for dart  on Ubuntu and after installing gcloud sdk and using the following command $ gcloud preview app run app.yaml I was getting: ERROR : (gcloud) Invalid choice: 'preview'. Solution is to run: $ gcloud components update preview Then I was getting ERROR : (gcloud.preview) Invalid choice: 'app'. Solution is to run: $ gcloud components update app As it turned out, I could have simply done this in one command $ gcloud components update preview app

I wanted to speed up my Android Emulator on my i5 desktop PC to try Android 5.0 Lollipop I created a x86 AVD running Android 5.0 (I could not manage to use a x86_64 image as it was either slow or crashing) KVM Intel processor seems to be required for now First check if KVM can be used $ sudo apt-get install cpu-checker $ kvm-ok INFO: /dev/kvm exists KVM acceleration can be used otherwise check your BIOS to enable KVM I then simply append  -qemu -enable-kvm to the command line (it has to be the last option) I use to start my emulator Open GL Make sure use Host GPU is checked in the your AVD or append  -gpu on to your emulator command line To solve the following issue: Could not load OpenGLES emulation library: lib64OpenglRender.so: cannot open shared object file: No such file or directory Here the solution is to add the tools/lib directory to LD_LIBRARY_PATH My final command line, assuming ANDROID_SDK point to you android sdk installation (in my case:...

I wanted to try oracle jdk vs openjdk performance for the DartEditor http://www.oracle.com/technetwork/java/javase/downloads/index.html I chose jdk-7u71-linux-x64.tar.gz that I extracted to /opt/apps/jdk1.7.0_71 Then comes the configuration: # One time setup # local var $ LOCAL_JAVA_TOP=/opt/apps/jdk1.7.0_71 # setup sudo update-alternatives --install /usr/bin/java java $LOCAL_JAVA_TOP/bin/java 110 sudo update-alternatives --install /usr/bin/javac javac $LOCAL_JAVA_TOP/bin/javac 110 Then to change configuration: # To change configuration between openjdk / oracle sudo update-alternatives --config java sudo update-alternatives --config javac At first, Oracle looks slightly slower in a simple test where I started exited the editor with a complex project. However the overall experience looks slightly faster...to be completed after some days of usage...

In finishing my "migration to a new machine" process, since I kept my old ssd drive. However the trash on this drive was not working and deleting a file was always giving: are you sure you want to permanently delete “xxx”? I had 2 issues: my user could not write on the root of the drive my user could not write in the existing trash The simplest was to own the drive $ sudo chown xxx:xxx /media/xxxx As I  have other user accessing the drive, I also has to change the permission $ sudo chmod 0775 /media/xxxx

I have to ssh into a server where the source and destination .ssh folder was empty (but ssh was installed) Here are the steps needed (using rsa) locally generate and get the content of the key (line starting with ssh-rsa...) $ ssh-keygen -t rsa $ cat ~/.ssh/id_rsa.pub ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDb...rGSQxR8t xxx@xxxxxx remotely $ cd ~/.ssh $ touch authorized_keys $ chmod 600 authorized_keys and then to append the content of the public key to the list of authorized key $ vi authorized_keys In one command: $ cat .ssh/id_rsa.pub | ssh user@host 'cat >> .ssh/authorized_keys'

I have a shared folder, that I synchronize with unison (ssh) that I want to allow for read-write for 2 users, that unfortunately were not created in the same group I choose the following solution so that I don't have to bother which user logs in using ssh: both user will be able to read/write files from each other First I add each user to the other's group sudo usermod -a -G other_group the_user Then I add the proper permission (switching to the shared folder first) sudo chmod -R u+rw,g+rw,o+r . et voilà It turns out that the executable bit was set for all files. I decided to remove id sudo find . -type f -exec chmod -x {} \;

I have a simple lubuntu server where I setup a ssh server. While it is sufficient to access a driver/folder from another linux machine using sftp, it is a pain from Windows & Mac, so unfortunately, samba is still needed here. For simplicity I needed only one samba user that I could map to a single user on my lubuntu machine Following the various tutorial I ended up doing this with simple commands Install samba $ sudo apt-get install samba Add myuser to the samba $ sudo smbpasswd -a myuser Export the drive I needed (no guest user) $ sudo vi /etc/samba/smb.conf to add the following export (no real option needed here) [files] path = /media/music/files writeable = yes save and Restart samba $ sudo service smbd restart

There is no linux driver however the Xerox Phaser 6000 is compatible and the driver can be found here: http://www.support.xerox.com/support/phaser-6000/downloads/engb.html?operatingSystem=linux&fileLanguage=en_GB One issue is that the driver is 64 bits only so to make it work I had to install a 32 bits compatibility layer $ sudo apt-get install libc6:i386 libncurses5:i386 libstdc++6:i386 libcupsimage2:i386 Instruction are similar to what is posted here for the Xerox 6010 In my various attemps, I had to remove the driver, restart cups, install the 32bits layers and THEN reinstall the driver, then the printer. In the printers applet, the model of the printer is 'Xerox Phaser 6000B'

In my first experimentation with WebMIDI, I could never get any simple MIDI output on Ubuntu 14.04. I wanted at least to make it work with timidity. I assume that you have enable WebMIDI in Chrome/Chromium/Dartium chrome://flags/#enable-web-midi I assume timidity is already running otherwise you can start it using timidity -iAD If you rather use fluidsynth you can start it with a command similar to fluidsynth -a alsa -m alsa_seq -l -i /usr/share/soundfonts/fluidr3/FluidR3GM.SF2 the list of outputs using the WebMIDI API was empty although I had the following $ aconnect -lo client 14: 'Midi Through' [type=kernel]     0 'Midi Through Port-0' client 128: 'TiMidity' [type=user]     0 'TiMidity port 0 '     1 'TiMidity port 1 '     2 'TiMidity port 2 '     3 'TiMidity port 3 ' client 129: 'FLUID Synth (32737)' [type=user]     0 'Synth input port (32737:0)' The solution I found was to load s...

While audio was playing fine in audacious and other music player in my Ubuntu 13.10, it was playing very fast and cracking in audacity. A solution that worked for me was to disable udev in the pulseaudio configuration The one line solution was to change /etc/pulse/default.pa sudo gedit /etc/pulse/default.pa existing ### Automatically load driver modules depending on the hardware available .ifexists module-udev-detect.so load-module module-udev-detect .else ### Use the static hardware detection module (for systems that lack udev support) load-module module-detect .endif new ### Automatically load driver modules depending on the hardware available .ifexists module-udev-detect.so _HACK_NO_UDEV load-module module-udev-detect .else ### Use the static hardware detection module (for systems that lack udev support) load-module module-detect .endif The next thing was to quit Audacity, kill pulse audio pulseaudio --kill then restart Audacity.

While most scenarios in Google Drive API doc and samples  tells to run the sample app on a server, it is actually possible to run from localhost as long as the javascript origin is properly added: Make sure you have created a new client id for web applications such as: Client ID for web application Client ID 123456789.apps.googleusercontent.com Email address 123456789@developer.gserviceaccount.com Client secret XxxxxXXXxxxxxx Redirect URIs none Javascript Origins http://127.0.0.1:3030 For example for dart applications: http://127.0.0.1:3030