sed

• Getting started with sed
• Additional Options
• Address and address range
• Lines matching regular expression pattern
• Negating address range
• Specific line
• Specific range of lines
• Specifying range using both number and pattern
• Advanced sed commands
• Append command
• Branching Operation
• BSD/macOS Sed vs. GNU Sed vs. the POSIX Sed specification
• Delete command
• In-Place Editing
• Regular expressions
• Substitution