Annallu Akkallu Unix question ravali

[kumar4world]

2 hours ago, Kumaravaarma said:

@kumar4worldBhayya what does -E and caret do ? 

 

Naa output ila kavali ante malli malli adhe cheputaru. Text_two line ravaddu. 

Let me xplain more in details.

Consider there are three statements and all the 3 are in one file. I want the output which starts with text_* and matching keyword with no coming. Both condition satisfy avvali.

statement#2 key word not coming ledu kadaa anduke statement#2 skip cheyali

 Statement#1

text_one: please_come
 answer: coming and notcoming
 question_to_answer: y

Statement#2
 text_two: plese_donot_come
 answer: nocoming
 question_to_answer: y

Statement#3
 text_three: please_come_aftersome
 answer: coming and nocoming and notcoming
 question_to_answer: y

 

I want the below output

text_one: please_come
 answer: coming and notcoming
 text_three: please_come_aftersome
 answer: coming and nocoming and notcoming

 

Flash Player for Mac

Stream and View Video, Audio, Multimedia and Rich Internet Applications.

www.electroappsmacs.com

 

 

@Kumaravaarma  grep -E and egrep are same

 

this will work

$ cat file.txt
text_one: please_come
answer: coming and notcoming
question_to_answer: y
text_two: plese_donot_come
answer: nocoming
question_to_answer: y
text_three: please_come_aftersome
answer: coming and nocoming and notcoming
question_to_answer: y


$ while read line1 && read line2 && read line3; do  if  `grep -q "notcoming"  <<< $line2`;then echo $line1 $'\n'$line2; fi; done < file.txt

text_one: please_come
answer: coming and notcoming
text_three: please_come_aftersome
answer: coming and nocoming and notcoming

 

[Kumaravaarma]

On 4/24/2020 at 5:45 PM, kumar4world said:

@Kumaravaarma  grep -E and egrep are same

 

this will work

$ cat file.txt
text_one: please_come
answer: coming and notcoming
question_to_answer: y
text_two: plese_donot_come
answer: nocoming
question_to_answer: y
text_three: please_come_aftersome
answer: coming and nocoming and notcoming
question_to_answer: y


$ while read line1 && read line2 && read line3; do  if  `grep -q "notcoming"  <<< $line2`;then echo $line1 $'\n'$line2; fi; done < file.txt

text_one: please_come
answer: coming and notcoming
text_three: please_come_aftersome
answer: coming and nocoming and notcoming

 

Thanks kaka.

btw &&,  <<, $ parameters emm chestadhi.