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UNIX for Beginners Questions & Answers
Need help with read command
Post 302979133 by Huitzilopochtli on Tuesday 9th of August 2016 10:45:12 PM
08-09-2016
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1. Shell Programming and Scripting
'Morning
vmstat 1 1|sed 1,2d|awk '{printf("%s\n",$1)}'|read var
echo $var
This syntax run on AIX (ksh) but not on linux (bash).
I think that problem is the read command, because the following syntax is ok :
vmstat 1 1|sed 1,2d|awk '{printf("%s\n",$1)}'
Could someone help me!
regards... (16 Replies)
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2. Shell Programming and Scripting
I have file which is space filled likE below
Note: here spaces are replaced by |.
When I use read command to read this file all the spaces are truncated only the default space is not removed. The output is
Note: here spaces are replaced by |.
Can this default truncation be override? (4 Replies)
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Hi all,
What does -u option indicates in read command.
while read -u var1
do
.
.
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hi all
iam not able use read command in the while loop in the following program
while read line
do
echo $line
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Is there a way to use the READ command and force the user to enter a non-zero length string? If the user enters a zero length string the user input is rejected.
code:
print "what is the answer: \n"
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6. UNIX for Dummies Questions & Answers
Hi everyone,
I have problem while writing a shell script for linux (Red Hat).
First I need to create a read command. I tried to google this but so far I can't sort this out. I hope you will be able to help me.
I have to read a file like this :
GESTION_DATA_SET_variable1_variable2
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Hey, guys!
Trying to research this is such a pain since the read command itself is a common word. Try searching "unix OR linux read command examples" or using the command substitution keyword. :eek:
So, I wanted to use a command statement similar to the following.
This is kinda taken... (2 Replies)
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Hello guys,
I am trying to a script that reads from key board and use the entered value in the next step.
Example: enter folder name
read $folder (i will give work)
cd /main/$folder/
pwd
it should print /main/work
---------- Post updated at 03:31 PM ----------... (1 Reply)
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Hi,
I am facing issues with the below:
I have a lookup file say lookup.lkp.This lookup.lkp file contains strings delimited by comma(,).
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So my code below is :
Contents in the lookup.lkp file is :
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Trying to use the read command. How do you add a 2nd option? In this example I'd like to offer two options, pre and post. If you answer pre, you get one output but if you answer post, you get another output.
echo Is this pre or post?
read pre
if
then echo You have typed pre.
fi (6 Replies)
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LEARN ABOUT DEBIAN
shtool-echo
SHTOOL-ECHO.TMP(1) GNU Portable Shell Tool SHTOOL-ECHO.TMP(1) NAME
shtool-echo - GNU shtool echo(1) extensional command SYNOPSIS
shtool echo [-n|--newline] [-e|--expand] string DESCRIPTION
shtool echo is an echo(1) style command which prints string to stdout and optionally provides special expansion constructs (terminal bold mode, environment details, date, etc) and newline control. The trick of this command is that it provides a portable -n option and hides the gory details needed to find out the environment details under option -e. OPTIONS
The following command line options are available. -n, --newline By default, output is written to stdout followed by a "newline" (ASCII character 0x0a). If option -n is used, this newline character is omitted. -e, --expand If option -e is used, string can contain special "%x" constructs which are expanded before the output is written. Currently the following constructs are recognized: %B switch terminal mode to bold display mode. %b switch terminal mode back to normal display mode. %u the current user name. %U the current user id (numerical). %g the current group name. %G the current group id (numerical). %h the current hostname (without any domain extension). %d the current domain name. %D the current day of the month. %M the current month (numerical). %m the current month name. %Y the current year. EXAMPLE
# shell script shtool echo -n -e "Enter your name [%B%u%b]: "; read name shtool echo -e "Your Email address might be %u@%h%d" shtool echo -e "The current date is %D-%m-%Y" HISTORY
The GNU shtool echo command was originally written by Ralf S. Engelschall <rse@engelschall.com> in 1998 for Website META Language (WML) under the name buildinfo. It was later taken over into GNU shtool. SEE ALSO
shtool(1), echo(1). 18-Jul-2008 shtool 2.0.8 SHTOOL-ECHO.TMP(1)