Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Compare an item in one line of a file against an item in the next line of the same file

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Compare an item in one line of a file against an item in the next line of the same file
# 8  
Old 04-19-2020
Many thanks @vgersh99

I deeply appreciate your assistance with this code. I have to run this command on over 50 devices, so I would really much prefer to run the command straight as creating a secondary file on all those devices will create a lot more work.
# 9  
Old 04-19-2020
Quote:
Originally Posted by championc
Many thanks @vgersh99

I deeply appreciate your assistance with this code. I have to run this command on over 50 devices, so I would really much prefer to run the command straight as creating a secondary file on all those devices will create a lot more work.
I don't follow... How creating a single script file will "create a lot more work" whether it gets run against one file/device or 50?
But if you insist:
Code:
#!/bin/ksh
awk '
{
  idx=""
  slide=(/drop/)?2:1
  for(i=1;i<=NF-slide;i++)
     idx=(i==1)?$i:idx $i
}
/drop/{d[idx]=$0;next}
/log/ && (idx in d) {delete d[idx]}
END {
  for(i in d)
    print d[i]
}' ruleSetFile.txt

if you have multiple rule files (1 per device), you can use the above and change it to iterate over your rule fileS.
This User Gave Thanks to vgersh99 For This Post:
championc
# 10  
Old 04-20-2020
You're an absolute star - thank you so much.

My issue was that I have to run it (exactly the same command request) on 50+ (nearer to 100) devices. So being able to logon to each device and just paste in a script on the commd line is so much simpler that needing to create a file on each device.
# 11  
Old 04-20-2020
Quote:
Originally Posted by championc
You're an absolute star - thank you so much.

My issue was that I have to run it (exactly the same command request) on 50+ (nearer to 100) devices. So being able to logon to each device and just paste in a script on the commd line is so much simpler that needing to create a file on each device.
Are you saying you're logging in to each "device" and running the script manually?
You think this would scale?
Why not to invest time/effort into automating this repetitive task?!
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Script to process a list of items and uncomment lines with that item in a second file

Hello, I have a src code file where I need to uncomment many lines. The lines I need to uncomment look like, C CALL l_r(DESNAME,DESOUT, 'Gmax', ESH(10), NO_APP, JJ) The comment is the "C" in the first column. This needs to be deleted so that there are 6 spaces preceding "CALL".... (7 Replies)
Discussion started by: LMHmedchem
7 Replies

2. UNIX for Beginners Questions & Answers

Zabbix item for last line of a log file

Dear all,Zabbix version : 2.4 (yes, I know, upgrading soon - honest) Server OS version : CentOS 6, 64-bit (CentOS 7 with the Zabbix upgrade)I've got a large log file that I would like to read by an external process. It's basically the same as reading the item value on a web-page. I have... (5 Replies)
Discussion started by: rbatte1
5 Replies

3. Shell Programming and Scripting

How to compare previous and current item in for loop in bash?

Hey, I am trying to compare formated login and logout dates from one user at a host which I have stored in a tmp directory in order to find out the total login time. I need to compare them in order to find overlapping intervals. At first I tried to store each log in and logo date in an array... (3 Replies)
Discussion started by: Mumu123
3 Replies

4. Shell Programming and Scripting

Read a lis, find items in a file from the list, change each item

Hello, I have some tab delimited text data, file: final_temp1 aname val NAME;r'(1,) 3.28584 r'(2,)<tab> NAME;r'(3,) 6.13003 NAME;r'(4,) 4.18037 r'(5,)<tab> You can see that the data is incomplete in some cases. There is a trailing tab after the first column for each incomplete row. I... (2 Replies)
Discussion started by: LMHmedchem
2 Replies

5. Shell Programming and Scripting

How to read file line by line and compare subset of 1st line with 2nd?

Hi all, I have a log file say Test.log that gets updated continuously and it has data in pipe separated format. A sample log file would look like: <date1>|<data1>|<url1>|<result1> <date2>|<data2>|<url2>|<result2> <date3>|<data3>|<url3>|<result3> <date4>|<data4>|<url4>|<result4> What I... (3 Replies)
Discussion started by: pat_pramod
3 Replies

6. Shell Programming and Scripting

how to compare file line by line with awk

im a newbee to unix. I have a requirement to compare two files with awk. file1.txt a b c d e file2.txt a b d e here i want to compare each line in file1 with corresponding line in file2 and prinf the line with difference. ie to check required result as shown below a=a (dont... (3 Replies)
Discussion started by: kiranps
3 Replies

7. Programming

Storing C++-struct in file - problem when adding new item in struct

Hi, I have received an application that stores some properties in a file. The existing struct looks like this: struct TData { UINT uSizeIncludingStrings; // copy of Telnet data struct UINT uSize; // basic properties: TCHAR szHost; //defined in Sshconfig UINT iPortNr; TCHAR... (2 Replies)
Discussion started by: Powerponken
2 Replies

8. Shell Programming and Scripting

Print new item in file with symbol

Dear all, I have encountered some problem here. I prompt the user for input and store it into a data file, eg. key in name and marks so the data file will look like this andrew 80 ben 75 and the next input is carine 90. So the problem here is i want to print... (2 Replies)
Discussion started by: branred
2 Replies

9. Shell Programming and Scripting

Reading each item from a formatted file

Hi, I have a file generated like this - 1. Fire SQL and store the formatted output in a temp file echo "select path, empid, age from emp_tbl" | /usr/sql emp_db 2 > count_file | grep vol > tempFile 2. The tempFile looks like this after the above statement /vol/emp1 0732 ... (9 Replies)
Discussion started by: angshuman_ag
9 Replies

10. Shell Programming and Scripting

Searching for file and stopping at first item found

Hello, I try to write a shell script that would list all files on a directory and stop when it finds the first item specified on a find or ls command. How can I tell to the find or ls command to stop when it finds the first ".doc" file for example ? Thank you (7 Replies)
Discussion started by: davchris
7 Replies
Login or Register to Ask a Question