Home ›

Automating Tasks with EXPECT

Issue 54

From Issue #54
October 1998

Oct 01, 1998  By Vinnie Saladino
 in
Mr. Saladino gives a quick introduction to EXPECT, a program to help you accomplish your remote tasks.
______________________

Comments

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

interact hangs out when I cat a large file

Anonymous's picture
Submitted by Anonymous on Thu, 02/11/2010 - 12:35.

Hi,

I would like to know whether there is any fix for to prevent interact command from hanging out when I cat a large inside a expect spawned process. Send in your reply to gururaj.srinivasarao@gmail.com

I found an amazing tutorial

Anonymous's picture
Submitted by Anonymous (not verified) on Wed, 06/03/2009 - 15:15.

you can check out this amazing tutorial its the best
http://exploring-expect-tcl.blog.com/2009/06/03/exploring-expect/

Very Good knowledge shaired

Shailesh's picture
Submitted by Shailesh (not verified) on Wed, 04/22/2009 - 06:01.

Thanks.
This is very good for system admins.

How to write regular expression for welcome message?

Anonymous's picture
Submitted by Anonymous (not verified) on Sun, 03/01/2009 - 23:40.

After login welcome message shows date and time .. How do we write RE for it ? Any idea.

TIA

Thanks !!! It helped me alot

Anonymous's picture
Submitted by Anonymous (not verified) on Fri, 05/16/2008 - 09:49.

Thanks !!! It helped me alot !!!!!

Expect buffer

Anonymous's picture
Submitted by Anonymous (not verified) on Wed, 02/21/2007 - 07:26.

Hello,

I want to know the size of expect_out(buffer).I want large amount of data to be moved to file using expect buffer but match_max did not help.

Can you please suggest me solution?

Thanks,
pankaj

Telnet session on a telnet session through EXPECT

Sapnesh's picture
Submitted by Sapnesh (not verified) on Thu, 03/29/2007 - 09:46.

Hi All,

I want to telnet to server A followed by another telnet to Server B from Server A.

I could create the expect scripts to telnet to a single server. But then if i send command 'send "telnet server B\r"`to Server A, it doesnot respond properly.

Please Help. do i need to spawn the second telnet process? If yes, then how would i pass the spawn id information back to local machine.

ThanksInAdvance,
Sapnesh

Your guide is very helpfull

rozi's picture
Submitted by rozi (not verified) on Tue, 11/07/2006 - 23:10.

Hi,
I'm seeking the guide that can help me solveing the auto task rather than crond. Now i found it. Great help!

Great solution

Chuck D Smith's picture
Submitted by Chuck D Smith (not verified) on Wed, 05/31/2006 - 17:39.

This article gave us a great hint to creating a solution to rebooting a Perle Specialix Jetstream terminal server for a failover test. The 'autoexpect' utility gave us the solution we needed in 5 minutes after we found the article. Great stuff! And the article is 8 years old at that!
Please renew my subscription... Oh yeah I just did renew it...

Great help! Thanks!

Anonymous's picture
Submitted by Anonymous (not verified) on Sat, 05/14/2005 - 10:56.

Great help! Thanks!

Re: System Administration: Automating Tasks with EXPECT

Anonymous's picture
Submitted by Anonymous on Tue, 06/10/2003 - 02:00.

It was a great info I was earlier looking for!
Long live :-)
Kumar

Re: System Administration: Automating Tasks with EXPECT

Anonymous's picture
Submitted by Anonymous on Sat, 03/16/2002 - 03:00.

How to automate telnet through this autoexpect.....can someone help me out....

thanks in advance

S.Sriram

Automating Telnet with expect

Yash's picture
Submitted by Yash (not verified) on Thu, 02/03/2005 - 09:05.

Hi Sriram,

This is too easy.

Just type

$ autoexpect -f telnet.exp telnet

and then enter your username and password
execute any command if u want on remote machine. Then finally exit.

After this telnet.exp file will be created.
Open telnet.exp file and delete the lines containing time stamp for your login. Save the changes. And run ./telnet.exp.

Hope this helps :)
Yash

Re: System Administration: Automating Tasks with EXPECT

Anonymous's picture
Submitted by Anonymous on Fri, 03/28/2003 - 03:00.

this acticle is too sample to help someone understand the Expect

Re: System Administration: Automating Tasks with EXPECT

Anonymous's picture
Submitted by Anonymous on Thu, 09/19/2002 - 02:00.

you just have to do :

autoexpect telnet X.X.X.X

then do like you were doing a standart telnet, enter all the command you need.

then, quit the telnet and a script will be generated in your folder.

juste lunch the script to see what you do before.

I hope it will help you.

Phil.

I was just wondering if

Anonymous's picture
Submitted by Anonymous (not verified) on Wed, 05/16/2007 - 14:55.

I was just wondering if anyone knew how to make the ip address you are telnet into a variable. I am using a script that was created by the autoexpect feature, but i want to be able to choose the ip address i am going to telnet. thanks for your help.

Telnet - variable IP

George Shelton's picture
Submitted by George Shelton (not verified) on Tue, 05/22/2007 - 14:43.

Here you go, Host name or IP will work.

# Get the Host name that you are going to work on

send_user "Input Host name here: "

expect_user -re "(.*)\n" {set HostName $expect_out(1,string) }

send_user "\n"
spawn telnet $HostName

Webcast
More Resources
How to Build an Optimal Hadoop Cluster to Store and Maintain Unlimited Amounts of Data Using Microservers

Realizing the promise of Apache® Hadoop® requires the effective deployment of compute, memory, storage and networking to achieve optimal results. With its flexibility and multitude of options, it is easy to over or under provision the server infrastructure, resulting in poor performance and high TCO. Join us for an in depth, technical discussion with industry experts from leading Hadoop and server companies who will provide insights into the key considerations for designing and deploying an optimal Hadoop cluster.

Learn More

Sponsored by AMD

White Paper
More Resources
Red Hat White Paper: Using an Open Source Framework to Catch the Bad Guy

Built-in forensics, incident response, and security with Red Hat Enterprise Linux 6

Every security policy provides guidance and requirements for ensuring adequate protection of information and data, as well as high-level technical and administrative security requirements for a system in a given environment. Traditionally, providing security for a system focuses on the confidentiality of the information on it. However, protecting the data integrity and system and data availability is just as important. For example, when processing United States intelligence information, there are three attributes that require protection: confidentiality, integrity, and availability.

Learn more about catching the bad guy in this free white paper.

Learn More

Sponsored by DLT Solutions