Allow upload mimetypes (file type extension)
This tutorial shows how to add file extensions and mimetypes to the list of allowed files of DokuWiki to get exotic files uploaded (invalid file error).
Batch resize images with ImageMagic
Recently I had to reduce the size of many images for uploading  them to a website. Unfortunately I didn’t find any tool like IrfanView on Ubuntu, which I’ve used for such problems in my Windows days. But there is a much smarter way to batch resize images on Linux. You simply can use the convert command from […]
Nice Python website crawler framework
Today I stumbled over http://scrapy.org/ while searching for an OpenSource website crawler. Its an interesting crawling and scraping framework for Python. It looks very convenient and easy to use. The most interesting feature seems to be the possibility to select website elements (f.e. hyperlinks) via CSS-selectors. In any case I’ll give it a try.
Flatten directory structure
Recently I brought a mp3 player that wasn’t able to shuffle the track through all folders. That’s why I had to bring all tracks to the root directory of the player (flatten directory structure). I did it with the following command, that flattens the whole structure by searching all files in the structure and copying […]
Resolve problems with authorized_keys permissions
Sometimes I had problems to connect to a server via public key authentication. In most cases I could solve them by setting up the right permissions for the file and path of the authorized_keys file. This can be done as shown below: $> chmod 700 $HOME/.ssh $> chmod 600 $HOME/.ssh/authorized_keys $> chmod go-w $HOME $HOME/.ssh […]
Get current user, mysql version and other status information
To get information about the currently connected user and more MySQL status information, you can call the following command if you are already logged in: This will give you an output like that: ————– mysql Ver 14.14 Distrib 5.1.73, for redhat-linux-gnu (x86_64) using readline 5.1 Connection id: 1044395 Current database: Current user: niceguy@localhost SSL: Not in […]
Simple rsync based backup script
This simple bash script is able to backup all given files and folders to a backup destination. I use it to backup all my Raspberry Pis, Banana Pis and also my notebook to my Synology NAS. Example call: If you want to run it as a crontab, you can use key based authentication (see SSH key […]
Create UTF-8 Database
To crate a UTF-8 database: CREATE DATABASE sns_typo3 DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
Reinstall Magento
To reinstall Magtento with the installation wizard you have to: delete app/etc/local.xml clear cache $> rm -rf /path/to/mage/var/cache/* reload your shop frontend
Recursively set permissions
To change the permissions of all files and / or folders insight the current folder recursively you can run one of  the following command: $> sudo find . -type d -exec chmod 644 {} \; #all folders get 644 $> sudo find . -exec chmod g+r {} \; #all files and folders get group read rights […]