The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Linux can be safe to use when its distribution is still supported, security updates are installed, software comes from sources you trust, and accounts and devices are protected. But “Linux” is a family of systems—not one operating system with a single update schedule or set of default protections. The useful question is whether your particular distribution and setup are maintained for the way you use them.
What does “safe” mean for Linux?
Safety depends on the system’s exposure and the consequences of a compromise. An internet-facing server, a laptop used by several people, and an offline personal workstation do not face the same risks. A system that is secure enough for one use may need additional protections for another.
Start with three checks: Is your specific distribution release still receiving security fixes? Are those fixes being installed? Do you trust the repositories, scripts, and services you use? These factors are more useful than treating Linux as categorically safer or less safe than Windows or macOS.
Canonical’s Ubuntu FAQ uses the question “Is Linux Secure?” as a prompt, but that vendor FAQ is not evidence that all Linux systems have identical security properties. Canonical also says it does not directly compare Ubuntu security with Debian security. [Ubuntu security FAQ]
#1 Best Overall
How much protection does a Linux distribution provide by default?
Distributions choose their own defaults and security components. Canonical documents Ubuntu features such as AppArmor, disk encryption, and network protections; those are Ubuntu-specific claims, not a guarantee that every Linux distribution enables the same controls. [Ubuntu security]
Defaults aim to balance protection with usability and performance. Canonical puts the trade-off plainly: “Hardening always involves a tradeoff with usability and performance.” That is Ubuntu guidance, not a universal rule that every system should be hardened as much as possible. [Ubuntu security]
Does your Linux release still receive security updates?
Support depends on the distribution, release, and sometimes the package. For example, Ubuntu documents five years of standard support for LTS Main and Restricted packages. Extended maintenance options differ by package group and depend on Ubuntu Pro or ESM configuration; these terms do not describe the support period for Linux as a whole. Check the support information for the release and packages you actually use. [Ubuntu release cycle]
Ubuntu’s documented support arrangements can change. If you rely on a specific Ubuntu release, confirm its current support dates and the status of relevant packages in Canonical’s release-cycle documentation rather than assuming all installed software is covered for the same period.
Rank #3
Are security updates being installed?
Use your distribution’s normal update mechanism and check that it is configured to install security fixes. In Ubuntu documentation, default installations beginning with 18.04 LTS are described as applying automatic security updates after 24 hours by default. That setting is Ubuntu-specific and should not be assumed for other distributions or customized installations. [Ubuntu automatic updates]
Third-party repositories and PPAs require separate unattended-upgrades configuration in Ubuntu. Updating packages from the main distribution source therefore does not necessarily update software from every repository you have added. [Ubuntu automatic updates]
How should you choose and run software?
Software source and the privileges you grant it affect your exposure. Debian’s guidance for defending against targeted attacks recommends using official repositories where possible, reviewing scripts before running them, avoiding unnecessary sudo, and removing remote-access services you do not need. These practices reduce avoidable risk; they cannot guarantee a system will not be compromised. [Debian targeted-attack guidance]
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
- Prefer your distribution’s official repositories when they provide suitable software.
- Assess who maintains third-party software and whether you trust its source.
- Read scripts before executing them, especially when they request elevated privileges.
- Use administrative privileges only when needed.
What about remote access and encryption?
Remove services you do not need
Remote-access services can expose a system to connections it would not otherwise accept. Debian’s targeted-attack guidance recommends removing services that are not needed. If remote access is necessary, make a deliberate choice about how it is protected rather than leaving an unnecessary service available. [Debian targeted-attack guidance]
Best Value
Use full-disk encryption for data at rest
Full-disk encryption can help protect stored data if a device is lost or stolen. Ubuntu documents LUKS-based encryption, with passphrase and TPM unlocking options. Availability and setup depend on the distribution and hardware. With passphrase-based encryption, protection depends heavily on the passphrase’s strength. Encryption of stored data does not establish that an already unlocked session is protected from someone who can access it. [Ubuntu disk encryption]
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Do vulnerability counts show whether Linux is safe?
Not by themselves. A count of reported vulnerabilities does not say how many apply to your configuration, whether fixes are available or installed, or what an attacker could do. The Linux kernel’s security-reporting guidance uses a narrower test: whether an attacker gains a capability across a trust boundary on a correctly configured production system. It is guidance for reporting kernel security issues, not a complete end-user checklist. [Linux kernel issue-reporting guidance]
The kernel documentation says, “By definition if an issue cannot be reproduced, it is not exploitable, thus it is not a security bug.” Read that in the context of the kernel project’s reporting process, not as a broad claim that an unconfirmed problem can never put a user at risk. [Linux kernel issue-reporting guidance]
Is Linux safer than Windows or macOS?
The available evidence does not establish a defensible overall ranking. A meaningful comparison would need to account for factors such as each system’s supported update lifetime, default protections, how easily users can install updates, exposed services, encryption options, and the user’s ability to maintain the system. Results can differ by distribution, release, configuration, and intended use.
For a practical choice, compare the specific systems you are considering on those factors rather than relying on a blanket claim about one operating-system family.
Quick Recap
A practical Linux security checklist
- Confirm that your distribution release and the packages you rely on remain supported.
- Install security updates through the distribution’s update mechanism, and check how any third-party repositories are updated.
- Prefer trusted software sources; review scripts before running them with administrative privileges.
- Remove remote-access services you do not need.
- Consider full-disk encryption for a portable device containing sensitive information, and choose a strong passphrase if you use passphrase-based unlocking.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
