| Nginx hardening profile |
| Hardening nginx with systemd security features |
| SocketBindAllow setting |
| SocketBindDeny setting |
| DevicePolicy setting |
| DeviceAllow setting |
| RestrictAddressFamilies setting |
| SystemCallFilter setting |
| Systemd syscall filtering |
| Linux capabilities 101 |
| Linux Capabilities: Hardening Linux binaries by removing setuid |
| ProtectKernelModules setting |
| ProtectKernelLogs setting |
| Troubleshooting a failed systemd unit (with examples) |
| InaccessiblePaths setting |
| What does systemctl daemon-reload do? |
| How to check if 'systemctl daemon-reload' is needed |
| strace cheat sheet |
| How to see which syscalls are part of a systemd syscall filter set |
| What is the difference between systemctl disable and systemctl mask? |
| How to use systemctl edit to change a service? |
| Run0: introduction and usage |
| run0 cheat sheet |
| How to reload the systemd configuration |
| How to see all active systemd units of one type |
| How to see only running services with systemctl |
| How to disable the background color of run0 |
| systemctl cheat sheet |
| Distributing SSH keys: using ssh-copy-id, manually or automated |
| MemoryDenyWriteExecute setting |
| ProtectProc setting |
| What is a masked systemd unit? |
| What is a systemd unit? |
| What is systemd? |
| How to see the size of the systemd journal |
| How to remove trailing whitespace from a file |
| How to insert a line at the beginning of a file |
| Ubuntu system hardening guide for desktops and servers |
| Linux security guide: the extended version |
| OpenSSH security and hardening |
| How to show failed units with systemctl |
| How to see the last X lines with journalctl |
| How to see the available systemd unit types |
| How to see the time synchronization details with timedatectl |
| How to override the settings of a systemd unit |
| How to start and enable a unit with systemctl |
| How to disable a systemd unit with systemctl |
| How to see all masked units with systemctl |
| How to kill a running process by its name |
| How to find all process IDs by its process name |
| How to show a running process name and its process ID (PID) |
| How to kill a zombie process |
| How to see new log entries automatically with journalctl |
| How to see logging for a specific unit or service |
| How to see only recent journal entries |
| How to see kernel messages with journalctl |
| How to limit the disk usage of the systemd journal |
| How to see the dependencies of a systemd unit |
| How to show the systemd machine ID |
| How to see cgroup in ps output |
| How to see the active settings of a systemd unit |
| How to see memory usage of a service with systemctl? |
| How to find the biggest directories on disk |
| How to see the available hard disks |
| How to see hard disk specifications and details |
| How to see BIOS details |
| How to list all USB devices |
| How to show all installed packages on Ubuntu |
| How to see the creation date of a file |
| How to securely delete a file and its contents |
| How to see memory information such as type and speed |
| How to see CPU details |
| How to compare two directories and find the differences |
| How to find symbolic links that point to a directory |
| How to see used and free disk space |
| How to see inode usage |
| How to see the size of a directory |
| How to see hidden files |
| How to see files great than a specific size |
| How to find when the last modification happened in a directory |
| How to find writable files |
| What is a zombie process? |
| How to stop all processes of a single user |
| How to show all installed packages with pacman |
| How to see the cgroup of a process |
| How to see the TTL value of a DNS record |
| How to see open ports on Linux |
| How to see which process is using a port |
| How to see the default gateway on Linux |
| How to see errors and dropped packets on a network interface on Linux |
| How to show network TCP statistics and counters |
| Show to clear the DNS cache with systemd |
| How to see active connections and bandwidth usage on Linux |
| How to see when the system was started (uptime) |
| How to see when a process was started |
| How to see the number of open connections on Linux |
| How to see which DNS server is used |
| How to see the IP address of your internet connection |
| How to see the the network IP address of your system |
| How to see the available SSH keys in the OpenSSH authentication agent |
