Programming and system resources

Useful electronic resources for programming, systems and others

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VMware ESXi: add cronjobs

cp /var/spool/cron/crontabs/root /var/spool/cron/crontabs/root.backup

chmod 644 /var/spool/cron/crontabs/root.backup

vi /var/spool/cron/crontabs/root.backup

Add your cron line to the file

chmod 444 /var/spool/cron/crontabs/root.backup

mv /var/spool/cron/crontabs/root.backup /var/spool/cron/crontabs/root

kill $(cat /var/run/crond.pid)

crond

vi /etc/rc.local.d/local.sh and add the following content:

/bin/kill $(cat /var/run/crond.pid)

/bin/echo "your cron line here" >> /var/spool/cron/crontabs/root

crond

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Windows XP: start remote desktop on boot

Create a remote desktop connection (Start --> Accesories --> Remote Desktop Connection1) with settings of your desire, and save it some place, e.g., C:\remote.rdp

Create a vbs with the following content:

Set shell = CreateObject("WScript.Shell") '* Create the script object

shell.Run "mstsc.exe /multimon c:remote.rdp", 1, True '* Execute the remote file save in the previous step

shell.Run "shutdown -t 0 -s -f" '* Shut down the computer when logging off

Save the file wherever you want, e.g., C:\remote.vbs

Now, let's change the default Windows shell; start Windows Group Policy Editor: Start --> Run2

Type: gpedit.msc

Edit the properties following policy using a right-click: User Configuration --> Admin Templates --> System --> Custom User Interface3

Enable the policy and type the following as the name of the file: cscript c:remote.vbs

Save the changes and restart the computer. It should boot straight to the remote connection.

If you ever want to edit anything within the local computer, you can do it starting in failing mode, pressing F8 on boot.

References: - http://serverfault.com/questions/339562/remote-desktop-auto-start-session-on-workstation-login - https://support.microsoft.com/en-us/kb/307882#bookmark-3 - http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/shutdown.mspx?mfr=true - http://stackoverflow.com/questions/162304/how-do-i-shutdown-restart-logoff-windows-via-bat-file

In Spanish, Inicio --> Todos los programas --> Accesorios --> Conexión a Escritorio remoto. ↩︎

In Spanish, Inicio --> Ejecutar ↩︎

In Spanish, Configuración de usuario --> Plantillas administrativas --> Sistema --> Interfaz de usuario personalizada ↩︎

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Capistrano Variables While reading through Capistrano’s code I’ve come across many the variables used to configure deploy.rb. So I don’t forget them when I need them, I’ll document them here: application – required repository – required scm – defaults to :subversion deploy_via – defaults to :checkout revision – defaults to the latest head version rails_env …

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Create a new git repository from a subfolder of an existing git repository

Clone the existing project into a new folder:

git clone [email protected]:user/project-name.git new-project-name

Change directory to the just cloned repository

cd new-project-name

Now it comes the magic, with the subdirectory-filter command:

git filter-branch --prune-empty --subdirectory-filter desired-folder master

Remove the origin and add the new one that must be created before:

git remote rm origin

git remote add origin [email protected]:user/new-project-name.git

git push origin master

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Supress PHP warnings in htaccess

# supress php errors php_flag display_startup_errors off php_flag display_errors off php_flag html_errors off php_value docref_root 0 php_value docref_ext 0

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Replace within files in command line

sed -i 's/word-to-replace/word-to-replace-for/g' *.txt

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Redirect to https if request is https

RewriteCond %{HTTP_HOST} ^sub.domain.com$ [NC]RewriteCond %{HTTPS} off [OR] RewriteCond %{HTTPS}:s on:(s) RewriteRule ^ http%1://sub.domain.com:2368%{REQUEST_URI} [P,QSA,L]

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Learn Apache mod_rewrite: 13 Real-world Examples

Learn Apache mod_rewrite

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Swiftmailer Spooling and Handling Failures

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AdamWhitcroft/Apaxy

Apaxy - A simple, customisable theme for your Apache directory listing.

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phanan/htaccess

A collection of useful .htaccess snippets.

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A successful Git branching model

In this post I present a Git branching strategy for developing and releasing software as I’ve used it in many of my projects, and which has turned out to be very successful.

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Converting a 5-year-old repository from Subversion to Git - DoneDone

We’ve been using Subversion for DoneDone’s source code hosting since 2009, and it’s served us well over the years. Lately, though, our coworkers at We Are Mammoth and Kin have been using Git (and GitHub) with…

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Perfect PHP url validation