Ετήσια αρχεία: 2014

Create a sortable ‘Modified Date’ sortable column for posts and pages in wordpress admin area 7

 στο Applications / CMS  επισημασμένο με ετικέτα admin / applications / cms / column / sortable / wordpress Από

2016-07-14: Post updated to support both pages and posts without redundant/useless code

Paste the following in the functions.php file of your theme:

// Register the column for modified date
function bf_post_modified_column_register( $columns ) {
    $columns['post_modified'] = __( 'Modified Date', 'mytextdomain' );
    return $columns;
}
add_filter( 'manage_edit-post_columns', 'bf_post_modified_column_register' );
add_filter( 'manage_edit-page_columns', 'bf_post_modified_column_register' );

// Display the modified date column content
function bf_post_modified_column_display( $column_name, $post_id ) {
    if ( 'post_modified' != $column_name ){
        return;
    }
    $post_modified = get_post_field('post_modified', $post_id);
    if ( !$post_modified ){
        $post_modified = '' . __( 'undefined', 'mytextdomain' ) . '';
    }
    echo $post_modified;
}
add_action( 'manage_posts_custom_column', 'bf_post_modified_column_display', 10, 2 );
add_action( 'manage_pages_custom_column', 'bf_post_modified_column_display', 10, 2 );

// Register the modified date column as sortable
function bf_post_modified_column_register_sortable( $columns ) {
    $columns['post_modified'] = 'post_modified';
    return $columns;
}
add_filter( 'manage_edit-post_sortable_columns', 'bf_post_modified_column_register_sortable' );
add_filter( 'manage_edit-page_sortable_columns', 'bf_post_modified_column_register_sortable' );

When you refresh http://<Your Domain>/wp-admin/edit.php or http://<Your Domain>/wp-admin/edit.php?post_type=page the ‘Modified Date’ column will be visible and sortable.

Bash: How to execute from root account a script as another user

 στο Bash / GNU/Linux / HowTos  επισημασμένο με ετικέτα bash / GNU/Linux / howtos / su / user Από

There are times that you need to execute a script as another user, usually to make sure you do not mess up the access rights of the files that will be produced after the execution of the script.

An easy way to do it is using the command su (su allows to run commands with a substitute user and group ID).

An example would be to use it as su - <USER> -c "<COMMAND>”
The –  <USER> will start the shell as a login shell with an environment similar to a real login.
The -c “<COMMAND>” will pass the command after -c to the newly created shell, you should wrap it in quotes if you want to pass parameters to your command.

Creating an MD5 hash of a string in bash

 στο Bash / GNU/Linux / HowTos  επισημασμένο με ετικέτα bash / echo / GNU/Linux / hash / howtos / md5 / md5sum / new line / newline Από

Make sure that you are not including the new line character (\n) as well in your string, there are cases where it might be included without you explicitly writing it.
For example if you use the output of an echo command in bash, it will automatically add a new line character to the end and will cause your hash to be not the one you would like to have.
For example, the MD5 hash of ‘bytefreaks.net’ (without the quotes) should be 16c00d9cfaef1688d4f2ddfb11b60f46 but if you execute the following you will see you will get a different result.
echo 'bytefreaks.net' | md5sum
01c46835dcb79be359e0b464ae6c6156 -
To avoid this error, use the -n option for echo that will direct the command not to output a trailing new line character.
echo -n 'bytefreaks.net' | md5sum
16c00d9cfaef1688d4f2ddfb11b60f46 -

How to list all available repositories on a Git server via ssh 12

 στο Bash / GNU/Linux / HowTos  επισημασμένο με ετικέτα bash / git / gitolite / GNU/Linux / howtos / ssh Από

ssh [email protected] info

The above ssh call will connect to a Git hosting server that has gitolite installed and will return the list of repositories that are available to your account along with the access rights of each.

Note: This command should work even if remote login via ssh is blocked on the server.

The command should return a list similar to this:

hello bytefreaks, this is git@git running gitolite3 v3.5.3.1-1-gf8776f5 on git 1.7.1

 R W	Repo1
 R W	Repo2
 R W	Repo3
 R  	Repo4

The first column in the results is the read flag, the second the write flag and the third column is the name of the repository.

In order to clone (get a local copy) a repository from the above list (for the example lets use Repo1) you have to issue the following command


git clone ssh://[email protected]/Repo1

To clone all of the repositories in the current directory with one command, as it is shown in this guide, issue the following command:


ssh [email protected] info | cut -f 2 | tail -n +3 | xargs -I {} -n 1 git clone ssh://[email protected]/{}