Oct 10, 2025
2025: Year of the Linux Desktop
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#photography
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2025: Year of the Linux Desktop
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Basic Linux Security (Updated 2025)
Install Unattended Upgrades and enable the "unattended-upgrades" service.
Install ClamAV and enable "clamav-freshclam" service.
Install and run Lynis to audit your OS.
Use the "last -20" command to see the last 20 users that have been on the system.
Install UFW and enable the service.
Check your repo sources (eg; /etc/apt/).
Check the /etc/passwd and /etc/shadow lists for any unusual accounts.
User the finger command to check on activity summaries.
Check /var/logs for unusual activity.
Use "ps -aux | grep TERM" or "ps -ef | grep TERM" to check for suspicious ongoing processes.
Check for failed sudo attempts with "grep "NOT in sudoers" /var/log/auth.log.
Check journalctl for system messages.
Check to make sure rsyslog is running with "sudo systemctl status rsyslog" (or "sudo service rsyslog status") and if it's not enable with "sudo systemctl enable rsyslog".
Perform an nmap scan on your machine/network.
Use netstat to check for unusual network activity.
Use various security apps to test you machine and network.
Change your config files for various services (ssh, apache2, etc) to non-standard configurations.
Disabled guest accounts.
Double up on ssh security by requiring both keys and passwords.
Check your package manager for any install suspicious apps (keyloggers, cleaners, etc).
Use Rootkit Scanners (chkrootkit, rkhunter).
Double SSH Security (Key + Password).
Use AES 256 Encryption on home folders/personal files.
Enabled Software Limiters (Fail2Ban, AppArmor).
Verify System Integrity via fsck.
Utilize ngrep/other networking apps to monitor traffic.
Utilize common honeypot software (endlessh).
Create new system-launch subroutines via crontab or shell scripts.
Ensure System Backups are Enabled (rsnapshot).
Check for suspicious kernel modules with "lsmod"
Bash and Zsh history leaks expose tokens and passwords. Use this 10-minute audit checklist to spot what most people miss—then harden fast. Read now. Today.
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If you've cast a half-glazed eye over Linux social media feeds at some point in the past few days you may have caught wind that a huge Linux
Guys, please make sure your Linux distro is updated: For Debian / Ubuntu distros run this command in a terminal:
sudo apt update && sudo apt upgrade
I started to sour on MacOS about 20 years ago when I discovered that they had, without notice, substituted their own, nonstandard version of the readline library for the one that the rest of the unix-like world was using. This broke gnuplot¹ and a lot of other free software. The creator of curl², Daniel Stenberg, writes about how Apple is still breaking things, this time with serious security and privacy implications.
1 Anon ‘Gnuplot Homepage’. Available from: http://gnuplot.info/
2 Anon (n.d.) ‘Curl’. Available from: https://curl.se
Linux Security: Using Open-Source Tools to Protect Your System
Linux Security: Using Open-Source Tools to Protect Your System
Linux is often hailed as being more secure than alternative systems, namely Windows and macOS. While this may be true in some cases, the actual security of your systems depends primarily on the methods and tools you’re using. If you freely allow remote access to your servers or run every file you come across, your system can be easily breached.
Rather than take a risk and hope that no attackers…
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