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Free Tools

Linux & System Administration Tools

Calculate file permissions and generate common Linux, Nginx, Apache, SSH, and cron configuration and commands.

17 tools in this category

Server Commands and Config Files, Without the Guesswork

Running a Linux server means remembering a lot of small syntax: permission numbers, cron fields, Nginx directives, SSH options. These tools build the command or file for you and explain what each part does.

Permissions and Scheduling

The chmod Calculator converts between numbers like 755 and symbols like rwxr-xr-x, and the Chown Command Generator sets file ownership correctly. For scheduled jobs, the Cron Expression Builder explains a schedule and the Crontab Generator writes a full crontab line. Long-running services are easier to manage with a unit file from the systemd Service Generator.

Web Servers and Remote Access

Our guides to file permissions and cron expressions go into more depth.