Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Script or command to: List a directory and cat a file on multiple servers

Posted on 2014-04-14
3
Medium Priority
?
676 Views
Last Modified: 2014-04-14
I'd like to write a quick script in bash to list the contents of a file located in /home/users/thisfile.txt

For example:

From
homeserver I'd like to execute a script called: what_thisfile.sh

whats_thisfile.sh should contain

ssh user@server_fus; cat /home/users/thisfile.txt
ls
read -s -n 1 -p "Press any key"
ssh user@server_cda; cat/home /users/thisfile.txt
ls
read -s -n 1 -p "Press any key"
...etc

The read command just pauses for a moment, so I can see what the file contains.

What's the best way to do what I'm describing? ...a command line for loop would be fine, it wouldn't have to be a script file.
0
Comment
Question by:Viclyn
  • 2
3 Comments
 
LVL 68

Accepted Solution

by:
woolmilkporc earned 2000 total points
ID: 39999252
Create a file named e.g "servers.txt" containing your servernames, one per line.

Example:

server_fus
server_cda
server_foo
server_bar
server_baz


Then

for S in $(<servers.txt)
 do
   ssh -tt user@$S '
      cat /home/users/thisfile.txt
      ls
       read -s -n 1 -p "Press any key"  '
done

A one-liner is possible, but really "long":

for S in $(<servers.txt);  do ssh -tt user@$S 'cat /home/users/thisfile.txt;  ls;  read -s -n 1 -p "Press any key"  ';  done

Open in new window


If you can go without "read" (sleep e.g. 1 second instead) we can make it shorter:

xargs -I{} ssh user@{} "cat /home/users/thisfile.txt;  ls; sleep1" <servers.txt
0
 

Author Comment

by:Viclyn
ID: 39999383
The "Press any key" seems to be suppressed. It still works, I was just wondering if there was a way to have it displayed during each iteration...?

But, I consider this answered, and very much appreciate the help.
0
 
LVL 68

Expert Comment

by:woolmilkporc
ID: 39999385
Did you notice that I edited my answer to add the "-tt" flag to the ssh command?
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Attention: This article will no longer be maintained. If you have any questions, please feel free to mail me. jgh@FreeBSD.org Please see http://www.freebsd.org/doc/en_US.ISO8859-1/articles/freebsd-update-server/ for the updated article. It is avail…
In part one, we reviewed the prerequisites required for installing SQL Server vNext. In this part we will explore how to install Microsoft's SQL Server on Ubuntu 16.04.
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…
Learn how to find files with the shell using the find and locate commands. Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:
Suggested Courses
Course of the Month12 days, 21 hours left to enroll

971 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question