I have roughly listed common jobs for software job positions. It may not fit to all company. However, I defined below through personal experience.

Common Job

• Write a code
• Build and Test
• Fix bugs

Common Job

• System Monitor
• Manage Infrascructure
• Install System Packages
• Install ouput from Dev

Common Job

• Define a test scenario and Write a test case
• Report bugs with/without logs.

Common Job

• Understand a system architecture
• Define a test scenario
• Do performance testing

Linux & Shell Basic

• shell-basic

Text Data Processing

• grep
• sed
• awk

Shell Script

• shell-script