Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: awk command not working as expected
Top Forums Shell Programming and Scripting awk command not working as expected Post 302970349 by Don Cragun on Tuesday 5th of April 2016 06:05:07 PM
Old 04-05-2016
Quote:
Originally Posted by later_troy
I don't understand what you mean by "above doesn't do anything that [code] wouldn't do". PLease explain.

awk version works: GNU Awk 3.1.3
awk version doesn't work: GNU Awk 3.1.7

Yes input files are identical
The command:
Code:
awk 'NR==1{print substr($0,3);next}{print substr($0,3)}' file1 > file2

prints from the 3rd character to the end of the 1st input line in file1 and prints from the 3rd character to the end of the remaining lines from file1 into file2, while the command:
Code:
awk '{print substr($0,3)}' file1 > file2

prints from the 3rd character to the end of every input line from file1 into file2. In what way do you think the output produced by these two commands would be different?
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

awk not working as expected with BIG files ...

I am facing some strange problem. I know, there is only one record in a file 'test.txt' which starts with 'X' I ensure that with following command, awk /^X/ test.txt | wc -l This gives me output = '1'. Now I take out this record out of the file, as follows : awk /^X/ test.txt >... (1 Reply)
Discussion started by: videsh77
1 Replies

2. Shell Programming and Scripting

Var substitution in awk - not working as expected

countA=`awk '/X/''{print substr($0,38,1)}' fName | wc -l` countB=`wc -l fName | awk '{print int($1)}'` echo > temp ratio=`awk -va=$countA -vc=$countB '{printf "%.4f", a/c}' temp` After running script for above I am getting an error as : awk: 0602-533 Cannot find or open file -vc=25. The... (3 Replies)
Discussion started by: videsh77
3 Replies

3. UNIX for Dummies Questions & Answers

Find command not working as expected

I have a script with a find command using xargs to copy the files found to another directory. The find command is finding the appropriate file, but it's not copying. I've checked permissions, and those are all O.K., so I'm not sure what I'm missing. Any help is greatly appreciated. This is... (2 Replies)
Discussion started by: mpflug
2 Replies

4. OS X (Apple)

Cat command not working as expected

I've been trying to figure this out since last night, and I'm just stumped. The last time I did any shell scripting was 8 years ago on a Unix box, and it was never my strong suit. I'm on a Mac running Leopard now. Here's my dilemma - hopefully someone can point me in the right direction. I'm... (10 Replies)
Discussion started by: Daniel M. Clark
10 Replies

5. Shell Programming and Scripting

bash variable (set via awk+sed) not working as expected

Hi! Been working on a script and I've been having a problem. I've finally narrowed it down to this variable I'm setting: servername=$(awk -v FS=\/ '{ print $7 } blah.txt | sed 's\/./-/g' | awk -v FS=\- '{print $1}')" This will essentially pare down a line like this: ... (7 Replies)
Discussion started by: creativedynamo
7 Replies

6. Shell Programming and Scripting

Read command not working as expected

I was trying to write a simple script which will read a text file and count the number of vowels in the file. My code is given below - #!/bin/bash file=$1 v=0 if then echo "$0 filename" exit 1 fi if then echo "$file not a file" exit 2 fi while read -n... (14 Replies)
Discussion started by: linux_learner
14 Replies

7. Shell Programming and Scripting

awk not working as expected in script

Dear all, I had script which used to work, but recently it is not working as expected. I have command line in my shell script to choose the following format from the output_elog and perform some task afterwards on As you see, I want all numbers in foramt following RED mark except for... (12 Replies)
Discussion started by: emily
12 Replies

8. Shell Programming and Scripting

Cp command not working as expected in HPUX

Hi, I'm having trouble with a simple copy command in a script on HPUX. I am trying to copy a file and append date & time. The echo command prints out what I am expecting.. echo "Backing up $file to $file.$DATE.$FIXNUM" | tee -a $LOGFILE + echo 'Backing up... (4 Replies)
Discussion started by: Glennyp
4 Replies

9. Shell Programming and Scripting

awk gsub not working as expected

Hi Experts, Need your kind help with gsub awk. Below is my pattern:"exec=1_host_cnt=100_dup=4_NameTag=targetSrv_500.csv","'20171122112948"," 100"," 1"," 1"," 4","400","","", " aac sample exec ""hostname=XXXXX commandline='timeout 10 openssl speed -multi 2 ; exit 0'"" ","-1","-1","1","... (6 Replies)
Discussion started by: pradyumnajpn10
6 Replies

10. Shell Programming and Scripting

awk matching script not working as expected

This is my ubuntu version: $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 16.04.4 LTS Release: 16.04 Codename: xenial $ /bin/awk -V | head -n1 bash: /bin/awk: No such file or directory I have gotten a script that helps me to parse,... (14 Replies)
Discussion started by: delbroooks
14 Replies

LEARN ABOUT SUNOS

comm

comm(1) 							   User Commands							   comm(1)

NAME

       comm - select or reject lines common to two files

SYNOPSIS

       comm [-123] file1 file2

DESCRIPTION

       The comm utility reads file1 and file2, which must be ordered in the current collating sequence, and produces three text columns as output:
       lines only in file1; lines only in file2; and lines in both files.

       If the input files were ordered according to the collating sequence of the current locale, the lines  written  will  be	in  the  collating
       sequence of the original lines. If not, the results are unspecified.

OPTIONS

       The following options are supported:

       -1	Suppresses the output column of lines unique to file1.

       -2	Suppresses the output column of lines unique to file2.

       -3	Suppresses the output column of lines duplicated in file1 and file2.

OPERANDS

       The following operands are supported:

       file1	A path name of the first file to be compared. If file1 is -, the standard input is used.

       file2	A path name of the second file to be compared. If file2 is -, the standard input is used.

USAGE

       See largefile(5) for the description of the behavior of comm when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes).

EXAMPLES

       Example 1: Printing a list of utilities specified by files

       If file1, file2, and file3 each contain a sorted list of utilities, the command

       example% comm -23 file1 file2  | comm -23 - file3

       prints a list of utilities in file1 not specified by either of the other files. The entry:

       example% comm -12 file1 file2 | comm -12 - file3

       prints a list of utilities specified by all three files. And the entry:

       example% comm -12  file2 file3 | comm -23 -file1

       prints a list of utilities specified by both file2 and file3, but not specified in file1.

ENVIRONMENT VARIABLES

       See  environ(5)	for  descriptions  of  the  following  environment  variables that affect the execution of comm: LANG, LC_ALL, LC_COLLATE,
       LC_CTYPE, LC_MESSAGES, and NLSPATH.

EXIT STATUS

       The following exit values are returned:

       0	All input files were successfully output as specified.

       >0	An error occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWesu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       cmp(1), diff(1), sort(1), uniq(1), attributes(5), environ(5), largefile(5), standards(5)

SunOS 5.10							    3 Mar 2004								   comm(1)
All times are GMT -4. The time now is 01:26 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy