Administration Calls

In this chapter, we will cover the following topics:

• Gathering information about processes
• What's what – which, whereis, whatis, and file  
• Killing processes, and sending and responding to signals
• Sending messages to user terminals
• The /proc filesystem
• Gathering system information
• Scheduling with a cron
• Database styles and uses
• Writing and reading SQLite databases
• Writing and reading a MySQL database from Bash
• User administration scripts
• Bulk image resizing and format conversion
• Taking screenshots from the terminal
• Managing multiple terminals from one