UNIX for Dummies Questions & Answers

Hi

I would like to ssh into serveral servers, print the hostname and do an ls (of files in a certain directory), and add these details to a file.

so i have this:

Code:

#!/usr/bin/bash

for host in hostnames_here
do

ssh $host echo "$HOSTNAME"  ls /directory_location > ~/new_file_name.txt

done

it doesn't work for me, it lists the files but doesn't echo/print the hostname.......which i need to distinguish between servers.

any help gladly received!

host is also a command so it is not wise at all to use it as a variable name...
What is hostnames_here ? A file?

And what doesnt work?

no, sorry i left out the names of the servers trying to help.

hostnames_here would be the server names i.e. server1 server2 server3 etc..

---------- Post updated at 06:49 AM ---------- Previous update was at 06:43 AM ----------

so what i'd like to see would be (in the output file)

servername1
file1_in_server1
file2_in_server1
(SPACE)
servername2
file1_in_server2
file2_in_server2
(SPACE)
etc etc

what i get now is just
filename1
filename2
filename3
filename4

Just one long list of file names.

I am not getting the name of the server in the list, so am not sure what files are from what server. There is no break in the list....i.e. not showing server1 / server 2 etc.

If your HOSTNAME variable value is set in all servers, then you will retrieve it via ssh

Code:

$ env | grep -w HOSTNAME
HOSTNAME=xxxxxxxxx

Instead of it, go with the hostname command

Code:

ssh $host " hostname ; ls -ltr /dir_location "

Hope this helps ..

As Jayan_jay suggests HOSTNAME is not initialized or it is the one from source machine so you have to use a command: hostname then to get 2 command executed you need to use the double quotes to "make your command "look" as one.

that did it for me! thanks very much everyone!