# Sed Command Examples
SED command in UNIX is stands for stream editor and it can perform lot’s of function on file like, searching, find and replace, insertion or deletion.
sed OPTIONS... [SCRIPT] [INPUTFILE...]
Here is just a brief list of examples of how to use sed
$sed 's/oldtext/newtext/' filemane.txt
Here the “s” specifies the substitution operation. The “/” are delimiters.
Replacing all the occurrence of the pattern in a line
$sed 's/oldtext/newtext/g' filename.txt
Parenthesize first character of each word
$ echo "This Is My Awesome Title" | sed 's/\(\b[A-Z]\)/\(\1\)/g'
Replacing string on a specific line number
$sed '3 s/oldtext/newtext/' filename.txt
Printing only the replaced lines use the -n option along with the /p print flag to display only the replaced lines.
$sed -n 's/oldtext/newtext/p' filename.txt
Replacing string on a range of lines
$sed '1,3 s/oldtext/newtext/' filename.txt
## Deleting lines from a particular file
Delete a particular line
$ sed '5d' filename.txt
Delete a last line
$ sed '$d' filename.txt
Delete from nth to last line
$ sed '12,$d' filename.txt
Delete pattern matching line
$ sed '/pattern/d' filename.txt
Learn more at GNU Sed Manual
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