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7 Some Sample Scripts

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

Joining lines:

  

Centering lines:

  

Increment a number:

  

Rename files to lower case:

  

Print bash environment:

  

Reverse chars of lines:

  

Text search across multiple lines:

  

Line length adjustment:

  

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

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