Linux Audit

Linux security and system management blog

Linux security blog

Linux Audit is one of few blogs available that fully dedicated to Linux security. The goal of the blog is to share high-quality articles to explain security concepts and how they apply to Linux systems.

Security topics

• Applying strict file permissions
• Secure the system by hardening systemd services
• Linux kernel features such as capabilities, cgroups, and namespaces
• Monitoring the system using the Linux Audit Framework
• Provide an overview of common Linux commands for system administration

Interested in a particular subject or want to look around? The glossary might be a great start.

Stay up-to-date and the RSS/Atom feed to your RSS reader (e.g. Thunderbird)!

Did you know?

Interesting one-liner

You can quickly go to your home directory

Linux has many commands

What is it? kill allows sending a signal to processes

Why use it? process management, free up resources, troubleshooting

See the command page of kill for more details how to use it, available options, and useful one-liners.

Learn more

Also 💙 the command-line or terminal? Have a look at the command-line tips. See the full list of commands covered at this blog.

Latest articles

Rate limit HTTP clients with nginx

Nginx can be configured to rate limit HTTP requests based on the IP address of the client. Learn how to set it up and tune it to your needs.

uname: show basic system information

The uname command is a small utility on Linux systems to show system information. It is usually available by default and easy to use.

head: show first number of lines from a file

The head command is a small utility on Linux systems to show the first 10 or defined number of lines of a file or filter standard input.

pidof: retrieve PID when searching for process names

The Linux command pidof returns the process ID (PID) of a process when searching for it by its name. Useful for command-line tasks and scripting.

lsns: show active Linux namespaces

The lsns command on Linux can be used to show the namespaces that are in use on the system. It may be used for information gathering or troubleshooting.

Frequently Asked Questions

When it comes to Linux, there is so much to ask, like:

• How to find writable files
• How to check if systemd is being used or active
• What is a kernel ring buffer?

Multiple sections within this site cover the frequently asked questions for Linux and Linux security.

• Data processing
• Linux file systems
• Hardware
• Kernel
• Networking
• Package manager
• Processes
• SSH
• System administration
• Systemd

Recent changes

• Linux Audit » Website information
• Website information » Latest changes
• Hardening profiles for systemd » Dovecot hardening profile
• Systemd » Systemd commands
• Systemd » Finding boot logs in systemd journals
• System administration » Linux commands
• Linux commands » systemd-analyze
• Linux commands » getpcaps command
• Linux commands » pmap command
• Linux commands » prtstat command
• Linux commands » head: show first number of lines from a file
• Linux commands » vmstat: system statistics about memory, processes, disks, block IO, CPU, and more
• Linux commands » resolvectl
• Linux commands » pidstat
• Linux commands » apt-file: show information about packages and related files
• Linux commands » pscap command
• Linux commands » getcap command
• Linux commands » setcap command
• Linux commands » basename: strip directory and file extension or suffix from path
• Linux commands » peekfd command
• Linux commands » rev command
• Linux commands » lsfd command
• Linux commands » iftop
• Linux commands » smem
• Linux commands » kill

Topics