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Permissions most often referred to and controlled using hex values. For example, if we want to set rw for only the owner we would type:

Permissions most often referred to and controlled using octal values. For example, if we want to set rw for only the owner we would type:

If you use SSH a lot, and are worried about man in the middle attacks, or even people logging into your system then you can use SSH Keys.

Key-based authentication has several advantages over password authentication, for example the key values are significantly more difficult to brute-force, or guess than plain passwords.

To set up SSH key authentication you need to first create the key pair. This is most easily done on your client machine. The machine which you want to access the Pi with.

If you use SSH a lot, and are worried about man in the middle attacks, dictionary attacks against your password, then you can use SSH Keys.

Key-based authentication has several advantages over password authentication, for example the key values are significantly more difficult to brute-force than plain passwords.

To set up SSH key authentication you need to first create the key pair. This is most easily done on your client machine (the machine with which you want to access the Pi).

This is a very important question, so I'm going to be as thorough as possible, please try to read as much as you can.

There are many ways to address vulnerabilities, however the first thing you should know is that Linux isn't as susceptible to intrusion as other Operating Systems. This is mainly due to lack of malware that targets *NIX. Nevertheless, you want to be aware of the ways in which your system can be accessed.

Remote access is probably the most important security hole. What we can use here is named security by obscurity. A common method of attack is to scan a range of IP addresses for open ports. So what we do to counter this is be one of the clever users who does not use the default ports.

There are many ways to address vulnerabilities, however the first thing you should know is that Linux isn't as susceptible to intrusion as other Operating Systems. This is mainly due to lack of malware that targets *NIX. Nevertheless, you want to be aware of the ways in which your system can be accessed.

Remote access is probably the most important security hole. What we can use here is named security by obscurity. A common method of attack is to scan a range of IP addresses for open ports. So one of the simplest countermeasures we can take is to be a user who does not use the default ports.