Daily Archives: 28 September 2011

One line infinite while loop

 in Bash / GNU/Linux / HowTos  tagged bash / GNU/Linux / howtos / infinite / one line / oneliner / while loop by 

while true; do echo 'Hit CTRL+C to exit'; someCommand; someOtherCommand; sleep 1; done

alternative syntax

while :; do echo 'Hit CTRL+C to exit'; someCommand; someOtherCommand; sleep 1; done

Include more filetypes to a WordPress Installation Media Library

 in Applications / CMS / HowTos  tagged applications / cms / filetype / howtos / media library / wordpress by

In the folder <Installation Path>/wp-includes/ there is a file called functions.php, inside this file there is a function called get_allowed_mime_types().
This function is in charge of defining an Array of mime types keyed by the file extension with a regex corresponding to those types.

So in order to add a new file-type to the white-list you just have to add a new line with the following format in the list:

'jpg|jpeg|jpe' => 'image/jpeg',

Where, on the left you define the extensions you want to be accepted separated by the vertical bar character (“|”) and on the right you give a file definition.

Bash: Read a file, line by line

 in Bash / GNU/Linux / HowTos  tagged bash / count / exec / GNU/Linux / howtos / line by

The following script will accept from the keyboard a filename, later it will read it and process it line by line.
In this example we will just number the lines, print them and count the total number of lines in the file.

#!/bin/sh
echo Enter the Filename to process
read filename
exec<$filename
lineNumber=0
while read line
do
	lineNumber=`expr $lineNumber + 1`;
	echo $lineNumber - $line;
done
echo "Total Lines Number: $lineNumber";