Visit Our UNIX and Linux User Community


Writing a bash script using host


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Writing a bash script using host
# 1  
Old 07-27-2012
Writing a bash script using host

Im trying to write a script using the host command but its not working properly. I cant understand what Im doing wrong. When I use it at the command prompt, it works fine. But its being used actually in the script, it says its not found: 2 SERVFAIL. Can anyone help me? Here's what I have so far: no matter which way I've tried it, its not reading the IP address. Im using yahoo's address as a reference.

host [-a] [hostname]
# 2  
Old 07-27-2012
Hi,

Can you show us the command that you are using, the way you are using it and the output please ?
# 3  
Old 07-27-2012
Here's the entire script:

Code:
echo -n "Enter your IP address:  "
read IP address
host -a
echo

Everything I run it, it says host not found

Last edited by methyl; 07-27-2012 at 09:24 PM.. Reason: please use code tags
# 4  
Old 07-27-2012
Quote:
Originally Posted by relsha
read IP address
This give SERVFAIL? I'd imagine a usage message since you did not give that IP back to the host command.

Code:
read ip
host -a "$ip"

# 5  
Old 07-27-2012
Ok. Thanks. Let me see how that works.

---------- Post updated at 05:55 PM ---------- Previous update was at 05:43 PM ----------

now it says:
Code:
host:  couldn't get an address for 'A' :  not found
./nslookup:  line 6:  69.147.76.15:  command not found


Last edited by methyl; 07-27-2012 at 09:27 PM.. Reason: pleae use code tags
# 6  
Old 07-27-2012
your file must be different than what you shown then...
# 7  
Old 07-27-2012
Please post:
1) Operating System and Version.
2) Which Shell you are using.
3) The contents of the file /etc/resolv.conf. A Name Server Lookup can only work if your system has access to a Name Server. To look up Internet Addresses, this needs to be an Internet Name Server which is visible from your local network. The SERVFAIL message implies that you do not have a valid DNS (Domain Name Server) or that the DNS server has failed.
4) The actual contents of your script, what you typed to invoke the script verbatim, and any output.
5) The name of the script. The error message impiles that your script is called nslookup which is the name of a system command called by the host command. Change the name of your script!
6) Hmm, the error message refers to line 6 and your script as posted does not have 6 lines. Let's see what you actually executed.

Last edited by methyl; 07-27-2012 at 09:39 PM..

Previous Thread | Next Thread
Test Your Knowledge in Computers #966
Difficulty: Medium
In HTML5 the 'ol' element has a new attribute called 'inline'
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Telnet Bash Script (Connection closed by foreign host.)

Hello Everyone, My following script is giving me problems, when the SIP trunk goes down and the telnet session is started and just when the command is about to complete the connection is closed then script restarts. I have noticed that as soon the script types in "sys re" or "sys rebo" or... (6 Replies)
Discussion started by: jeetz
6 Replies

2. Shell Programming and Scripting

Writing hive scripts in bash script file

Hi, I wanted to load data from HDFS to HIVE by writing bash script. Description: I have written a bash script to validate the data and loaded validated data from local file system to HDFS. Now in the same bash script i wanted to load the data from HDFS to HIVE. How can i do it ? Also how tyhe... (2 Replies)
Discussion started by: shree11
2 Replies

3. Shell Programming and Scripting

Question about writing a bash script

Hello, I want to write a bash script to delete the content after '#'. However, if '#' appears in a string with "", ignore this. For example, input file: test #delete "test #not delete" Output file: test "test #not delete" Does anyone know how to write this script? Thanks (1 Reply)
Discussion started by: jeffwang66
1 Replies

4. Shell Programming and Scripting

Mkbootfs writing to stdout in bash script

Hi, I need to automate some repacking tasks of a boot image for Android When in command line, I can use this command: mkbootfs /path/to/root > /path/to/ramdisk-recovery.cpio;However, if I try to run the command from a shell script under Ubuntu, it fails and outputs to stdout instead of the... (27 Replies)
Discussion started by: Phil3759
27 Replies

5. Shell Programming and Scripting

Bash script to Automate the Virtual Host creation process!!

Hi all, This is my sample code in /etc/httpd/conf.d/applications.conf file currently we are creating subdomain mannually for every new subdomain. I want to automate this process througs bash script , how its possible. <VirtualHost *:80> ServerName google.com ServerAlias google.com... (5 Replies)
Discussion started by: anishkumarv
5 Replies

6. Homework & Coursework Questions

brand new user!.. Lost on BASH script writing

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: I have just gotten into writing bash scripts for a class, part of the assignment is to read and be able to tell... (4 Replies)
Discussion started by: Byrang
4 Replies

7. Shell Programming and Scripting

Help with writing simple bash script

I want to write a bash script to: 1. Send an email from localhost to an external gmail account. (gmail then automatically forwards the message back to a pop account on the same server. 2. Script waits 3 minutes then checks to see if the email arrived, and if not, it sends an email to... (9 Replies)
Discussion started by: sallyanne
9 Replies

8. UNIX for Dummies Questions & Answers

Bash Script to check Remote Host Connection

Hi all, Can anyone tell/guide me how to check remote host is up/running using bash script? Thanks. Zulfiqar (5 Replies)
Discussion started by: zulfikarmd
5 Replies

9. Shell Programming and Scripting

Writing Bash script

Could anyone help me to Write a script in BASH Shell to determine the percentage of system disk space you are using. (1 Reply)
Discussion started by: boris
1 Replies

10. Shell Programming and Scripting

Problems writing bash script to unzip files

I'm getting the following errors when I try to write a script to unzip some zip files. When I use the free trial copy of the commerical winzip program, however, they work fine. When I use -l or -t on unzip it indicates no errors. When I use the -o switch interactively from the bash command line it... (1 Reply)
Discussion started by: siegfried
1 Replies

Featured Tech Videos