Need to add prefix using sed or awk from cat the file Post: 303006161

Sponsored Content

Top Forums Shell Programming and Scripting Need to add prefix using sed or awk from cat the file Post 303006161 by Don Cragun on Friday 27th of October 2017 10:36:23 PM

10-27-2017

Registered User

Quote:

Originally Posted by ranjancom2000

That was final processed output after this output i need to compare with the file which will have only devs info. I need check the file and compare only with the device mention in "nofast". I dont want to use "forloop" since number of device will be more it will take time. Instead i want to compare only the awk output of nofast device and update the prefix

If the device found in the input file update the field with nofast_T1 if not found update with nofast_nofound

---------- Post updated at 09:40 AM ---------- Previous update was at 08:48 AM ----------

Source file -file1

Code:

Server1,dev14,nofast,TDEV RW 69053
Server2,dev4,nofast,TDEV RW 69053
Server2,dev1,nofast,TDEV RW 103579
Server3,dev7,nofast,TDEV RW 69053

Input file -file2

Code:

dev14
dev15
dev16
dev17
dev18
dev19
dev20
dev21
dev1
dev23
dev24
dev25

I need output

Code:

Server1,dev14,nofast_found,TDEV RW 69053
Server2,dev4,nofast_not_found,TDEV RW 69053
Server2,dev1,nofast_found,TDEV RW 103579
Server3,dev7,nofast_not_found,TDEV RW 69053

I need to use awk lookup on this. But i dont how to filter source file coloum2 and Vlookup with input file and check the record is found on that file

Code:

awk 'NR==FNR {m[$1]=$1; next} {$1=m[$1]; print}' file1 file2

Please reread your statement of what needs to be done marked in red above. Then note that some lines in your output have nofast_found which is not mentioned as an output that should be produced. And note that no output contains the string nofast_T1 which you said should be produced for any line where the 2nd field in file1 is found as a 1st field value in file2. And note that no output contains the string nofast_nofound (although some do contain nofast_not_found).

If you can't give us a description of the work that needs to be done by a script that matches the output you say you want, there isn't much chance of us being able to help you write a script that does what you want it to do.

Is there still some other intermediate step that you haven't told us about that changes nofast_T1 to nofast_found and changes nofast_nofound to nofast_not_found possibly with some other requirements you haven't mentioned?

Don Cragun

View Public Profile for Don Cragun

Find all posts by Don Cragun

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Problem to add the string(without sed & awk) into the middle of file

Hi, I have tried many times to add the string into the first line of the file or the middle of the file but could not find the solution. I first tried by $echo "paki" >> file This code only append paki string at the end of file "file" but how can i add this "paki" into the first line or...

2. UNIX for Dummies Questions & Answers

tr, sed, awk, cat or scripting

I need to change all Newline caracters (\12) to Fieldseparator(\34). tr -A '\12' '\34' <file1> file2 Replace all delete (\177) with Newline (\12) tr -A '\177' '\12' <file2> file3 Put the name of the file first in all rows. awk '{printf "%s\34%s\n", FILENAME,$0} file3 > file4 So far no...

3. Shell Programming and Scripting

Remove prefix using awk

Remove prefix using awk File: nawk -F"|" '{if ($1 ~ /^xyz./) print; else { gsub(.*\..*, \..*, $1) ;print }}' file Error: ouput required:

4. Shell Programming and Scripting

Need awk script to add a prefix to each line in file

Hello , I have file with below content : '165567885', '165568443', '165568805', I need an awk script that would add a prefix zero after first ' . Like '0165567885', '0165568443', '0165568805', Please help. Thanks in advance.

5. Shell Programming and Scripting

awk or sed to add field in a text file

Hi there, I have a csv file with some columns comma sepated like this : 4502-17,PETER,ITA2,LEGUE,92,ME - HALF,23/05/10 15:00 4502-18,CARL,ITA2,LEGUE,96,ME - HALF,20/01/09 14:00 4502-19,OTTO,ITA2,LEGUE,97,ME - MARY,23/05/10 15:00 As you can see the column n. 7 is a timestamp column, I need...

6. Linux

Adding a prefix to a column using awk/sed commands

Hello, I am a newbie to linux and struggling to find a better way to append a column in a text file. Here is the file i want to modify: It has 8 columns (and thousands of rows). I want to append the first column by adding "chr" infront of the numbers. Some rows have a string in the first...

7. UNIX for Dummies Questions & Answers

How to pass cat file in awk statement?

Hi, I am working on kernel parameters, want to check values under /proc/sys/kernel below I tried for kernel.sem SEMMNS: 4096 cat /proc/sys/kernel/sem | awk '{print $2}' awk '{ if ($2 < 33000) print }' /proc/sys/kernel/sem |awk '{print $2}' 32000 The above...

8. Shell Programming and Scripting

Extract Uniq prefix from a start and end prefix

Dear All, assume i have a file with content: <Start>6000</Start> <Stop>7599</Stop> the output is: 6000 7000 7100 7200 7300 7400 7599 how should we use any awk, sed, perl can do this task, means to extract the uniq prefixes from the start and stop prefix. Thanks Jimmy

9. Shell Programming and Scripting

awk move select fields to match file prefix in two directories

In the awk below I am trying to use the file1 as a match to file2. In file2 the contents of $5,&6,and $7 (always tab-delimited) and are copied to the output under the header Quality metrics. The below executes but the output is empty. I have added comments to help and show my thinking. Thank you...

10. Shell Programming and Scripting

Add the word "prefix" to beginning of line using sed

SUSE linux bash shell this works test -d /tmpp && echo "directory exists" || echo "directory doesn't exists" |sed -e "s/^/prefix /" prefix directory doesn't exists but why doesn't this work? test -d /tmp && echo "directory exists" || echo "directory doesn't exists" |sed -e...

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Problem to add the string(without sed & awk) into the middle of file

Discussion started by: ali hussain

2. UNIX for Dummies Questions & Answers

tr, sed, awk, cat or scripting

Discussion started by: MrKlint

3. Shell Programming and Scripting

Remove prefix using awk

Discussion started by: pinnacle

4. Shell Programming and Scripting

Need awk script to add a prefix to each line in file

Discussion started by: rmv

5. Shell Programming and Scripting

awk or sed to add field in a text file

Discussion started by: capnino

6. Linux

Adding a prefix to a column using awk/sed commands

Discussion started by: bjorngill

7. UNIX for Dummies Questions & Answers

How to pass cat file in awk statement?

Discussion started by: stew

8. Shell Programming and Scripting

Extract Uniq prefix from a start and end prefix

Discussion started by: jimmy_y

9. Shell Programming and Scripting

awk move select fields to match file prefix in two directories

Discussion started by: cmccabe

10. Shell Programming and Scripting

Add the word "prefix" to beginning of line using sed

Discussion started by: snoman1