Pipe to awk to variable Post: 302551705

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Is it better to grep and pipe to awk, or to seach with awk itself

This may just be a lack of experience talking, but I always assumed that when possible it was better to use a commands built in abilities rather than to pipe to a bunch of commands. I wrote a (very simple) script a while back that was meant to pull out a certain error code, and report back what...

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Assign command (with pipe) output to a variable

Hi , I would like to assign command (with pipe) output to a variable. The code is as follows. The goal of the code is to get the last folder folder with a particular name pattern. myDate=`ls | grep 2009 | tail -1` echo "myDate=" $myDate However, in the presence of the pipe, the code...

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Hey all, I've tried this for quite some time now and haven't figured it out... I was hoping one of you shell scripters could help a newbie out :) I am trying to take the 1st parameter of my script and use it as the search pattern for my for loop #!/usr/bin/sh set -vx REGEX=$1 ...

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a pipe within a variable

Hi, I am trying to run this command: ED_CMD="$Access_OPS $ED_Logs_Dir/access | $lgrep -v $Access_Err" $lgrep $ED_CMD However, i am getting an error "Failed to open |: Broken pipe at " My question is how to put a pipe within a variable. Thanks. John.

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using awk for setting variable but change the output of this variable within awk

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<tr><th align=right valign=top>Faulty_Part</th><td align=left valign=top>readhat version 6.0</td></tr> <tr><th align=right valign=top>Submit_Date</th><td align=left valign=top>2011-04-28 02:08:02</td></tr> .......(a long string) I want to get all the field between "left valign=top>" and "...

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Hey fellas, I wrote an script which its output is like this: a 1 T a 1 T a 2 A b 5 G b 5 G b 5 G I wanna print $1 $2 and the total number of $2 value as the third column and after that $3. Sth like this: a 1 2 T a 2 1 A b 5 3 G I know how to do it with a given input...

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awk pipe to sort

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Help on passing an input variable to the voronota program (after third pipe)

Dear UNIX forum members, I am using macbook pro 13 (2015 edition) with MAC OS Mojave and am trying to write the shell script where when it is run through terminal it asks for an input (in the code below an input variable is domains) and then that input becomes capital letter or letters which...

LEARN ABOUT LINUX

getusershell

GETUSERSHELL(3) 					     Linux Programmer's Manual						   GETUSERSHELL(3)

NAME

       getusershell, setusershell, endusershell - get permitted user shells

SYNOPSIS

       #include <unistd.h>

       char *getusershell(void);

       void setusershell(void);

       void endusershell(void);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       getusershell(), setusershell(), endusershell():
	   _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)

DESCRIPTION

       The  getusershell()  function  returns the next line from the file /etc/shells, opening the file if necessary.  The line should contain the
       pathname of a valid user shell.	If /etc/shells does not exist or is unreadable, getusershell() behaves as if  /bin/sh  and  /bin/csh  were
       listed in the file.

       The setusershell() function rewinds /etc/shells.

       The endusershell() function closes /etc/shells.

RETURN VALUE

       The getusershell() function returns a NULL pointer on end-of-file.

FILES

       /etc/shells

CONFORMING TO

       4.3BSD.

SEE ALSO

       shells(5)

COLOPHON

       This  page is part of release 3.27 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

GNU
								    2007-07-26							   GETUSERSHELL(3)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Is it better to grep and pipe to awk, or to seach with awk itself

Discussion started by: DeCoTwc

2. Shell Programming and Scripting

Assign command (with pipe) output to a variable

Discussion started by: jeff_cen

3. Shell Programming and Scripting

Trying to embed a pipe with a variable IN a variable

Discussion started by: Keepcase

4. Shell Programming and Scripting

a pipe within a variable

Discussion started by: john_prince