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How to extract the following values/fields from the text file in Linux system:

EventCorrelationId="615-493|-1899671563||1550927718000"
CreationTime="20190225094504"
SubscriberNumber=92705073362

Text file sample data is mentioned below:

2019-02-25 09:45:04.427 FAIL RETRY: Failed for request id: 11235993 Cause: userNotReachable Info: <undef> Code: 27,USSD RequestId=11235993 OriginalId=11235993 EventCorrelationId="615-493|-1899671563||1550927718000" CreationTime="20190225094504" ResendCount=0 Timestamp=1551071704342 (Mon Feb 25 09:45:04 AFT 2019) State=STATE_SENT SubscriberNumber=92705073362 UssdText=Last event was charged 687.95 MB from 3GB Monthly, Main Account 6.00 PKR, Remaining data 2,388.75 MB (Exp 25.03.2019), Main Account 7.62 PKR1500 PKR = 32GB valid 30 Days, Dial *477*32*1#. NumberingPlan=1 Nadi=4 UssdFormat=2 

Using grep

$ grep -oE '(EventCorrelationId|CreationTime|SubscriberNumber)[^ ]*' textfile
EventCorrelationId="615-493|-1899671563||1550927718000"
CreationTime="20190225094504"
SubscriberNumber=92705073362

Using awk

Try:

$ awk -v RS=' ' '/^EventCorrelationId=/ || /^CreationTime=/ || /^SubscriberNumber=/' textfile
EventCorrelationId="615-493|-1899671563||1550927718000"
CreationTime="20190225094504"
SubscriberNumber=92705073362

How it works

• 
  

  -v RS=' '

  
  
  

  This tells awk to use a blank as the record separator.

  
  


• 
  

  /^EventCorrelationId=/ || /^CreationTime=/ || /^SubscriberNumber=/

  
  
  

  This tells awk to print the record if it matches any of these three regular expressions. Some notes:

  
  
  

  • In a regex, ^ means beginning-of-the-record. Thus /^CreationTime=/ means a record that starts with CreationTime=

  
  

  • In awk, like many languages, || means logical-or. Thus ^EventCorrelationId=/ || /^CreationTime=/ is true if either regex is matched.

  
  

Using sed

$ sed -En 's/.*(EventCorrelationId=[^ ]*).*(CreationTime=[^ ]*).*(SubscriberNumber=[^ ]*).*/1n2n3/p' textfile
EventCorrelationId="615-493|-1899671563||1550927718000"
CreationTime="20190225094504"
SubscriberNumber=92705073362

Using an alternate separator in the output

To use | as the output separator in place of newline:

$ sed -En 's/.*(EventCorrelationId=[^ ]*).*(CreationTime=[^ ]*).*(SubscriberNumber=[^ ]*).*/1|2|3/p' textfile
EventCorrelationId="615-493|-1899671563||1550927718000"|CreationTime="20190225094504"|SubscriberNumber=92705073362

$ grep -Eo '(EventCorrelationId|CreationTime|SubscriberNumber)=[^ ]+' file
EventCorrelationId="615-493|-1899671563||1550927718000"
CreationTime="20190225094504"
SubscriberNumber=92705073362

• 
  grep -Eo grep in extended regular expression mode (less escaping of special chars) and print only the matched parts


• 
  (EventCorrelationId|CreationTime|SubscriberNumber) match EventCorrelationId or CreationTime or SubscriberNumber


• 
  =[^ ]+ followed by "=", followed by non-space-character one or more times

Edit1:

Now separated by "|":

$ echo $(grep -Eo '(EventCorrelationId|CreationTime|SubscriberNumber)=[^ ]+' file) | tr ' ' '|'
EventCorrelationId="615-493|-1899671563||1550927718000"|CreationTime="20190225094504"|SubscriberNumber=92705073362

Edit2:

Now separated by "|" in reversed order using tac:

$ echo $(grep -Eo '(EventCorrelationId|CreationTime|SubscriberNumber)=[^ ]+' file | tac) | tr ' ' '|'
SubscriberNumber=92705073362|CreationTime="20190225094504"|EventCorrelationId="615-493|-1899671563||1550927718000"

I Tried with below awk method and it worked fine

j=`awk 'print NF' filename `
for ((i=1;i<=$j;i++)); do awk -v i="$i" '$i ~ /EventCorrelationId/||$i ~ /CreationTime/||$i ~ /SubscriberNumber/print $i' filename ; done

output

EventCorrelationId="615-493|-1899671563||1550927718000"
CreationTime="20190225094504"
SubscriberNumber=9270507336

You can perform this exercise bu building up your regex dynamically, based on the fields you want outputted:

$ perl -lne '
 $re = join "|", map +quotemeta qw/EventCorrelationId CreationTime SubscriberNumber/;
 print join "|", /(?:$re)=H+/g;
' input.file

Output:

EventCorrelationId="615-493|-1899671563||1550927718000"|CreationTime="20190225094504"|SubscriberNumber=92705073362

Working:

• The fields that you want output are placed in an anonymous array qw/.../.


• Then we transform each of them using map ... by joining with logical OR |.


• In the last step, we apply the regex just constructed on the current record, $_, and the fields fished out are joined via the pipe symbol | to get the output.