awk command Post: 4771

8 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

assign a command line argument and a unix command to awk variables

Hi , I have a piece of code ...wherein I need to assign the following ... 1) A command line argument to a variable e.g origCount=ARGV 2) A unix command to a variable e.g result=`wc -l testFile.txt` in my awk shell script When I do this : print "origCount" origCount --> I get the...

2. Shell Programming and Scripting

awk/sed Command : Parse parameter file / send the lines to the ksh export command

Sorry for the duplicate thread this one is similar to the one in https://www.unix.com/shell-programming-scripting/88132-awk-sed-script-read-values-parameter-files.html#post302255121 Since there were no responses on the parent thread since it got resolved partially i thought to open the new...

3. UNIX for Dummies Questions & Answers

Basic awk question...getting awk to act on $1 of the command itself

I have a script problem that I am not able to solve due my very limited understanding of unix/awk. This is the contents of test.sh awk '{print $1}' From the prompt if I enter: ./test.sh Hello World I would expect to see "Hello" but all I get is a blank line. Only then if I enter "Hello...

4. Shell Programming and Scripting

awk command for simple join command but based on 2 columns

input1 a_a a/a 10 100 a1 a_a 20 200 b1 b_b 30 300 input2 a_a a/a xxx yyy a1 a1 lll ppp b1 b_b kkk ooo output a_a a/a 10 100 xxx yyy

5. Shell Programming and Scripting

awk command in script gives error while same awk command at prompt runs fine: Why?

Hello all, Here is what my bash script does: sums number columns, saves the tot in new column, outputs if tot >= threshold val: > cat getnon0file.sh #!/bin/bash this="getnon0file.sh" USAGE=$this" InFile="xyz.38" Min="0.05" # awk '{sum=0; for(n=2; n<=NF; n++){sum+=$n};...

6. Shell Programming and Scripting

awk command to compare a file with set of files in a directory using 'awk'

Hi, I have a situation to compare one file, say file1.txt with a set of files in directory.The directory contains more than 100 files. To be more precise, the requirement is to compare the first field of file1.txt with the first field in all the files in the directory.The files in the...

7. Shell Programming and Scripting

Multiple command execution inside awk command during xml parsing

below is the output xml string from some other command and i will be parsing it using awk cat /tmp/alerts.xml <Alert id="10102" name="APP-DS-ds_ha-140018-componentFailure-S" alertDefinitionId="13982" resourceId="11427" ctime="1359453507621" fixed="false" reason="If Event/Log Level(ANY) and...

8. Shell Programming and Scripting

Pass awk field to a command line executed within awk

Hi, I am trying to pass awk field to a command line executed within awk (need to convert a timestamp into formatted date). All my attempts failed this far. Here's an example. It works fine with timestamp hard-codded into the command echo "1381653229 something" |awk 'BEGIN{cmd="date -d...

LEARN ABOUT FREEBSD

stdbuf

STDBUF(1)						    BSD General Commands Manual 						 STDBUF(1)

NAME

     stdbuf -- change standard streams initial buffering

SYNOPSIS

     stdbuf [-e bufdef] [-i bufdef] [-o bufdef] [command [...]]

DESCRIPTION

     stdbuf is used to change the initial buffering of standard input, standard output and/or standard error streams for command.  It relies on
     libstdbuf(3) which is loaded and configured by stdbuf through environment variables.

     The options are as follows:

     -e bufdef
	     Set initial buffering of the standard error stream for command as defined by bufdef (see BUFFER DEFINITION).

     -i bufdef
	     Set initial buffering of the standard input stream for command as defined by bufdef (see BUFFER DEFINITION).

     -o bufdef
	     Set initial buffering of the standard output stream for command as defined by bufdef (see BUFFER DEFINITION).

BUFFER DEFINITION

     Buffer definition is the same as in libstdbuf(3):

	   "0"	 unbuffered

	   "L"	 line buffered

	   "B"	 fully buffered with the default buffer size

	   size  fully buffered with a buffer of size bytes (suffixes 'k', 'M' and 'G' are accepted)

EXAMPLES

     In the following example, the stdout stream of the awk(1) command will be fully buffered by default because it does not refer to a terminal.
     stdbuf is used to force it to be line-buffered so vmstat(8)'s output will not stall until the full buffer fills.

	   # vmstat 1 | stdbuf -o L awk '$2 > 1 || $3 > 1' | cat -n

SEE ALSO

     libstdbuf(3), setvbuf(3)

HISTORY

     The stdbuf utility first appeared in FreeBSD 8.4.

AUTHORS

     The original idea of the stdbuf command comes from Padraig Brady who implemented it in the GNU coreutils.	Jeremie Le Hen implemented it on
     FreeBSD.

BSD
								  April 28, 2012							       BSD