Install network traffic monitoring utility vnStat on Ubuntu server

vnStat is a console based network traffic monitoring utility for Linux which collects bandwidth statistic for selected interface(s).
Network traffic monitoring utility vnStat

To install vnStat run:
sudo apt-get install vnstat

To create and configure database run:
sudo vnstat -u -i eth0
Note 1: This assumes that you want to monitor eth0 interface. To find all your active interfaces run ifconfig.
Note 2: Some manuals state that above command should create a cron job. This was the case with older vnStat 1.6 version. Current vnStat 1.10 version uses daemon therefore cron job is not created. To check your vnStat version run: sudo vnstat -v

To start monitoring daemon run:
sudo service vnstat start

To display collected statistics run:
vnstat -q
Note: it may take couple of minutes after starting the service for vnStat to display statistics.

To display transfer rates in real time run:
vnstat -l

To view all options run
vnstat -?

Ubuntu server 10.10

Importing large sql file into MySQL database

The easiest way to import an .sql file into MySQL database is use phpMyAdmin web interface.

  • Login into phpMyAdmin control panel
  • Select your database
  • Click on Import tab
  • Select your .sql file, click Go and you are done


Problem with this is that PHP configuration normally limits size of files you can upload. There should be a notice on phpMyAdmin Import tab telling what's the maximum file size you can upload. If you exceed this limit you will get an error similar to:
You probably tried to upload too large file. Please refer to documentation for ways to workaround this limit.
or
No data was received to import. Either no file name was submitted, or the file size exceeded the maximum size permitted by your PHP configuration.

You have a few options to overcome this limitation:

Option 1 - Compress SQL file

Compress you .sql file using zip, gzip or bzip2 method. SQL files basically are plain text files so they compress quite well. If you are still exceeding the limit use one of the other options.

Option 2 - Increase PHP file size limit

Open your php.ini file. If you not sure where your php.ini is located, check here.

Find following lines
post_max_size
upload_max_filesize
and increase values to required size in MB. E.g.
post_max_size = 10M
upload_max_filesize = 10M

Save the file and restart apache:
/etc/init.d/apache2 restart

After import is completed you may want to restore original values.

Option 3 - use mysql command in terminal

You can bypass phpMyAdmin altogether and do the import via terminal.

Upload your sql file to the web server and run flowing command in terminal:
mysql -u <username> -p <database> < /path/file.sql
where:
<username> - your MySQL username. e.g. root
<database> - database you are importing to
/path/file.sql - full path to your .sql file

It will prompt you for your MySQL password and complete the import.

Tested on Ubuntu web server

Ubuntu Server Tips

Check remaining disk space

df -h
Reports free space on each mount.

Monitor web server in real time

tail -f /var/www/yoursite/logs/access.log
Reads Apache access long file and displays changes in real time. Your log file may be in different location depending on settings.

Check Ubuntu Server Linux version

Ubuntu Server doesn't have GUI, but you can find version using number of terminal commands

lsb_release -a

cat /etc/issue

cat /proc/version

uname -a



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