Sometimes when you are committing changes in git you’ll find that a number of files have been deleted.

You could manually set these files to delete by individually issuing the command:

git rm filename

However, there is a shortcut. If you issue the command:

git ls-files --deleted

It will return a list of all files that are flagged as deleted.

You can then simply pass that list to git rm, using a combined syntax like this:

git rm $(git ls-files --deleted)

Just don’t forget the--deleted parameter!

The following command can be used to find and checkout (undo) all files with modifications:

git checkout $(git ls-files -m)

This is effectively an “undo” of all modifications in the given branch (but it doesn’t impact added or deleted files).

Here’s a list of things you can check if you aren’t getting anything written to the PHP error log on your server:

• In php.ini, do you have error_reporting set to E_ALL ?
• In php.ini, do you have log_errors enabled?
• In php.ini, do you have track_errors enabled?
• Have you specified a valid file / location for error_log
• Does the user that starts PHP (e.g apache) have relevant permissions and ownership to write to the PHP error_log file ?
• Does your application have an override set in .htaccess or php.ini for any of the above?
• Have you restarted PHP/Apache after making changes for these things to take effect?
• What does php -i | grep error tell you regarding these settings?

To see what storage engine is used by the server by default you can use the following command in the MySQL/MariaDB shell:

show variables like '%storage_engine';

You can view a list of supported engines using:

show engines\G;

To find out what storage engine your tables are using by schema use this command. You might want to filter by TABLE_SCHEMA to see a specific database.

select TABLE_SCHEMA, TABLE_NAME, ENGINE 
from information_schema.tables;

You can view statistics about a particular engine using the following (adjust for the relevant engine):

show engine innodb status\G

By default on Apache web servers, PHP code will not execute in a file that does not have a .php (or similar) extension. So even though you can embed PHP into a HTML file, it won’t execute when the file extension is .html, .htm etc.

To change this, you can add a .htaccess file to allow PHP execution.

Here are some examples depending on your system:

AddType application/x-httpd-php .html .htm

For certain hosting providers you may need to do this (adjust for PHP version too).

Addhandler application/x-httpd-php5 .html .php

Put this in a file called .htaccess in the same folder as your HTML files.

For example, on a Mac, you’ll often find .DS_Store files. To find and remove these you can run the following command to search for and remove every instance:

$ find . -type f -name ".DS_Store" -exec rm {} ;

This will find all files (-type f) called .DS_Store and execute the rm (remove) command on that set {}.

Run from the top directory and it will recurse its way into all sub directories and remove the files. This can be a dangerous command so use with caution.

You can also adapt the command to execute something else (e.g. a mv to another location for example.

The following addition to your .bash_profile is super handy if you regularly use the command line/console on your Mac. Instead of simply deleting files forever it will instead put them into the .Trash folder in a unique sub-folder so you can recover them until you empty your bin. Very handy if you delete something by accident!

function rm () {
  local path
  for path in "$@"; do
    # ignore any arguments
    if [[ "$path" = -* ]]; then :
    else
      local dst=${path##*/}
      # append the time if necessary
      while [ -e ~/.Trash/"$dst" ]; do
        dst="$dst "$(date +%H-%M-%S)
      done
      mv "$path" ~/.Trash/"$dst"
    fi
  done
}