Shell Programming and Scripting

Hi All,
I have some requirement. i dont know if we can write some shell script to fulfill the requirement. Here is my requirement...
I have some files under /var/opt/abc/xyz like below.
-rw-r--r-- 1 root root 789222 Aug 14 11:03 big.sh
-rw-r--r-- 1 root root 789222 Aug 14 11:03 big.txt
-rw-r--r-- 1 root root 789222 Aug 14 11:03 big.txt
-rw-r--r-- 1 root root 789222 Aug 14 11:03 big.sh
-rw-r--r-- 1 root root 789222 Aug 14 11:03 big.txt
-rw-r--r-- 1 root root 789222 Aug 14 11:03 big.txt (This is basically to get the file size)

In those files, there are some files are .txt files. I need to get find out those .txt files and output shoud like below...
-rw-r--r-- 1 root root 789222 Aug 14 11:03 big.txt
-rw-r--r-- 1 root root 789342 Aug 14 11:03 big.txt
-rw-r--r-- 1 root root 7823252 Aug 14 11:03 big.txt

And also i need to do this on several servers. I dont know if we can write a script and put it on one server and run it from there to get the final output. output should be like this....
servername: abc
-rw-r--r-- 1 root root 789222 Aug 14 11:03 big.txt
-rw-r--r-- 1 root root 789342 Aug 14 11:03 big.txt
-rw-r--r-- 1 root root 7823252 Aug 14 11:03 big.txt
servername: xyz
-rw-r--r-- 1 root root 789222 Aug 14 11:03 big.txt
-rw-r--r-- 1 root root 789342 Aug 14 11:03 big.txt
-rw-r--r-- 1 root root 7823252 Aug 14 11:03 big.txt
servername: mnc
-rw-r--r-- 1 root root 789222 Aug 14 11:03 big.txt
-rw-r--r-- 1 root root 789342 Aug 14 11:03 big.txt
-rw-r--r-- 1 root root 7823252 Aug 14 11:03 big.txt
anybody help me out to write this script. Thanks in advance.

You want to ls -l *.txt in several servers? Is that it? Do the servers have ssh?

Also it would be nice to know the OS. If it is AIX there would be dsh (Distributed Shell) to simultaneously execute a command on several servers, but other OSes might have different means of achieving that or none at all.

So: please help us to help you and tell us some details.

I hope this helps.

bakunin

Thanks for your reply guys...

I got some SLES and some RHEL servers. I dont know whether these servers has ssh. How can we check that.
Also to do ls -l *.txt, we have to go to particular file path then only we can run this command to get the desired output. Instead of going to particular path, can we run this command from Home directory or somewhere else with out doing sudo su - (non root user). Thanks.

Issue "ssh". If you see "unknown command" or something such it is not installed, if you get a (ssh-)prompt it is.

ls -l /some/path/*txt

This will list all files "*txt" in the directory "/some/path".

I hope this helps.

bakunin

If it's OpenSSH I don't think you get an interactive prompt, you just get a brief usage message. The big question is how you connect to those other servers now, if you have to walk to the console of each one to type commands then that's not easily scriptable, but telnet or rsh or ssh can be scripted (ssh more easily, and of course, it's the only secure option).

In reality you are looking for sshd on remote server and ssh on local.
On remote from CLI check if sshd is running using the command:

Code:

pgrep sshd
or..
ps -aux | grep '[s]shd'
or..
ssh localhost    #if sshd run on default port 22