You appear to be coming from the ip address below..

Simple. Fire these commands to reset your user and also secure their gpg keys / files as well.  The user name will be substituted automatically.

sudo chown -R $USERNAME:$USERNAME /home/$USERNAME
sudo find ~ -type f -print0 | xargs -0 chmod 0640
sudo find ~ -type d -print0 | xargs -0 chmod 0750
sudo chmod 600 ~/.ssh/id_rsa
sudo chmod 740 ~/Desktop/*.desktop
sudo chmod 600 ~/.gnupg/*
sudo chmod 700 ~/.gnupg

Very simple. Use the following commands..

Backup to an external file.

On the *nix command line, just run..

mysqldump -u root -p database_name > /path/to/database_dump_file.sql

Punch in the password for root (in this case) and the backup is output to the file database_dump_file.sql. It’s ASCII so it can be edited if needed.

Restore from an external file..

mysql -u root -p database_name < /path/to/database_dump_file.sql

Typed the password and that's it, finished.

Need the database names quickly?

Log in to the database as ususal with the command at the *nix command line.

mysql -u root -p

And then issue the following at the prompt..

mysql> show databases;

and you get this....

+----------------------+
| Database             |
+----------------------+
| information_schema   |
| largedump            |
| dspam                |
| mysql                |
| performance_schema   |
| testdata             |
| testdata_1           |
| dataset_4            |
| dataset_2            |
+----------------------+
9 rows in set (0.01 sec)

This is quite handy and easy to set up.

First, open up main.cf, the principal configuration file in Postfix. I use vim, but of course you can use whatever editor you like, e.g. vi, nano etc.

sudo vim /etc/postfix/main.cf

In your main.cf, add the following lines in the configuration

smtpd_sender_restrictions =
        check_sender_access hash:/etc/postfix/sender_access

Now, create a file to store the list of banned names.

sudo touch /etc/postfix/sender_access

and now edit it to add the banned names…

sudo vim /etc/postfix/sender_access

Add the banned addresses in the following format..

news@z.mindsportzero.com REJECT
subscriptions@cashiq.net REJECT
business-quote@receiveyourquote.co.uk REJECT
penny.fox@flashmarketing.info REJECT
enquiries@flashmarketing.info REJECT

Save the file. Now, create the hashed db file for this file..

sudo postmap /etc/postfix/sender_access

Now you should have a file in the /etc/postfix directory called /etc/postfix/sender_access.db

Now all you need to do is restart postfix.

sudo service postfix restart

Tanaaaa!

Here’s the command to run a complete scan but exclude the sys, proc, dev and lib directories.

sudo clamscan -r -i --exclude-dir='^/sys|^/proc|^/dev|^/lib' /

In Debian / Ubuntu, use avconv.

avconv -i input.mp4 -b 64k -s hd720 -strict experimental output.mp4

This command uses avconv, where..

-i input.mp4 = the input file name
-b 64k = down sample the audio channel to 64k – should be fine.
-s hd720 = reduce the video from hd1020 to the 720 format
-strict experimental = Allows mp4 output
output.mp4 = the output file.

If you haven’t got avconv installed, use

sudo apt-get install avconv

and follow instructions.