Due to the chance of low penetration into PC segments, hackers rarely target Linux machines, as there are fewer options for potential victims and existing users will belong to the developer community. In fact, even Linux will have some vulnerabilities that can be exploited against user privacy.
The Linux community is huge and very active in pushing updates to build a better operating system that is reliable and secure. In addition to supporting the community, every Linux user should know some privacy basics to protect your sessions. Here’s a rundown of some of the basic Linux privacy tips.
1. Turn on firewall
Most Linux distributions come with a default firewall. Iptables most commonly used as a Firewall utility in Linux. It is an extremely flexible firewall utility built for Linux operating systems. But the downside of this service is just the CLI (Command Line Interface). If you are an expert Linux user, this does not bother you in any way, but for newbies it presents some challenges when setting up a firewall.
Fortunately, there are some graphical user interface (GUI) interfaces for iptables… Utilities such as Gufw and Firestarterhelp you quickly and easily set up your firewall by removing the hassle of using newbie commands.
2. Check for rootkits
Some professional hackers can install rootkits on Linux systems by exploiting critical vulnerabilities in Linux. If you feel the presence of rootkits on your computer, you can check it with chkrootkit… This is a shell script that checks system binaries to modify rootkits.
By running the command
sudo chkrootkityou can determine the presence of rootkits. In addition, the commands chkproc.c, chkdirs.c will help you detect signs of Trojans.
3. Using passwords
Always protect user accounts with strong and secure passwords. More importantly, password protect your superuser account and change them periodically. You can follow this tutorial to learn how to create strong passwords in Linux.
4. Data encryption
It is recommended that you encrypt your data if you work in sensitive environments where your information is valuable. You can encrypt the hard drive completely, or you can even encrypt just the home directory.
If you work in a shared environment, you prefer home directory encryption. Moving away from disk encryption is a bit of a tricky task after installing a Linux distribution. This is usually requested during disk partitioning. Therefore, you must select it there.
If not, you can back up your data and reinstall the OS to enable disk encryption.
5. Stay with us
Always download and install the latest system updates and security fixes. You can automatically update security fixes. sudo apt-get upgrade and sudo apt-get update will check your system for software updates and updates and fixes.
6. Disable unnecessary services
Like many other operating systems, some Linux daemons will run in the background and listen on active ports. If you don’t use these services often, you can stop them. Team netstat -lt will list all active listening services. Stopping background tasks will also reduce loading times.
Never allow root login via remote access when using Linux servers. You can configure these in the system-wide SSH config file by disabling PermitRootLogin and setting it to “no”. Do not use the default port 22 and switch to a different port for temporary remote connections.
Here are some basic tips to keep your Linux server healthy. Are we missing something? Don’t forget to share any additional tips you know in the comments below.