Raspbian Jesse

This page is for the things I learn on my Linux travels. Mainly this (at the time of writing) due to several Linux based products in my workplace (CentOS based) and the truly amazing Raspberry Pi range. I have not yet decided whether to split the Linux page in to two sub categories to reflect this.
Configure Static IP Address
Command Line MySQL
UFW - Uncomplicated Firewall

Restart Apache2 Web Server

From time to time it might be necessary to restart the Apache Web Server, normally this is required after a configuration change, or if a site has stopped.
From the command line:
sudo /etc/init.d/apache2 restart

Check Disk Space

Working from the command line has some disadvantages, one of those is that you don't have a constant graphical reminder of physical and available disk space. To check this we can use the command df which stands for disk filesystem
From the command line:
df -h — (the -h means human readable format, so instead values being in bytes, they are displayed at MB or GB etc)
$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/root 6.0G 3.7G 2.0G 66% /
devtmpfs 214M 0 214M 0% /dev
tmpfs 218M 0 218M 0% /dev/shm
tmpfs 218M 4.5M 213M 3% /run
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 218M 0 218M 0% /sys/fs/cgroup
/dev/mmcblk0p6 63M 20M 43M 32% /boot
tmpfs 44M 0 44M 0% /run/user/1000

Change Password

To change the password for a user, when logged in as that user, from the command line enter:
sudo passwd pi — (make sure you use the correct username, pi is just for the example)
you will then be prompted to enter, then re-enter the new password
$ sudo passwd pi
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully