sed¶

Match whole string:
```
$ sed "s/\b<keyword\b/g"
```
Usage: echo “bar foobar” | sed “s/\bbar\b/nobar/g”
Print line matching given pattern:
```
$ sed -n /PATTERN/p filename
```
Prints lines matching given pattern till address:
```
$ sed -n ‘/PATTERN/,Np’ filename
```
Prints lines matching given address till pattern:
```
$ sed -n ‘N,/PATTERN/p’ filename
```
Prints from the line matches the given pattern to end of file:
```
$ sed -n ‘/PATTERN/,$p’ filename
```
Prints the lines which matches the pattern and next N lines following the matched line:
```
$ sed -n ‘/PATTERN/,+Np’ filename
```