4 Some Sample Scripts

Here are some sed scripts to guide you in the art of mastering sed.

Some exotic examples:

• Centering lines
• Increment a number
• Rename files to lower case
• Print bash environment
• Reverse chars of lines

Emulating standard utilities:

• tac: Reverse lines of files
• cat -n: Numbering lines
• cat -b: Numbering non-blank lines
• wc -c: Counting chars
• wc -w: Counting words
• wc -l: Counting lines
• head: Printing the first lines
• tail: Printing the last lines
• uniq: Make duplicate lines unique
• uniq -d: Print duplicated lines of input
• uniq -u: Remove all duplicated lines
• cat -s: Squeezing blank lines