sed Tip - #5

[Trevor]

A file named "months" contains the following content:

January
February
March
April
May
June
August
September
November
December

$  sed  -i   '7i\July'  months
- This command will insert the month "July" on the 7th line
of the file,

Note:  The word "July" is actually added to the file, on the 7th line!

Question:  Any idea how to go about inserting "October" between
"September" and "November", without making reference to the
line number?

Note: This question is open to Chetan_Tiwary-level and below!

[Chetan_Tiwary_]

@Trevor LOL there is a new level unlocked with my name :xD :

By using this command you can achieve the objecive :

sed -i '/November/i\October' months

this expression : /November/i\October : tells sed to search for the text November and insert before it  ( i\ ) the text October in the months file.

[Chetan_Tiwary_ · Accepted solution]

So, one can achieve the same objective by using this command as well :

sed -i '/September/a\October' months

a is for append the text October after the matched text pattern September.

[Trevor]

The highest Red Hat certification level is based on
Chetan_Tiwary_

RHCA (Red Hat Chetan Accolade)

[Chetan_Tiwary_]