Visit Our UNIX and Linux User Community


rsh problem


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting rsh problem
# 1  
Old 01-18-2006
rsh problem

Hi,

I am using rsh command in scripting. But I wan to run the script as a bg process.

When I run the script, it says stopped.

My doubt is ....if I use the rsh in scripting ......bg is possible or not ???

EX: test-rsh

rsh 172.16.73.38 df -k >DF.log

Result when I run this script

root@FRAPRB2BADE1 # nohup ksh test-rsh &
Sending output to nohup.out
[1] 24994
root@FRAPRB2BADE1 #

[1]+ Stopped nohup ksh test-rsh
root@FRAPRB2BADE1 #

The process will not run as bg??

Waiting for your replay

------
vastare
# 2  
Old 01-19-2006
rsh problem

Hi,

no one is there to answer for this question ??????? Smilie

its very urgent.....please help me out. Smilie

------------
vastare
# 3  
Old 01-19-2006
first off --- forum rules says you're not suppose to bump up questions so you broke this rule by putting in your second post on this thread ...


second, your test-rsh is not accurate because the "df -k" command you are giving terminates immediately after it gives you a one-time output ... try testing with a "ls -l /dir/file" loop instead ... if your result still disallows you putting the rsh job in the background, try the code below ...


run the rsh command in the background inside a sub-shell ...
Code:
(rsh servername "jobname" < /dev/null > /dir/file 2>&1 &)

# 4  
Old 01-19-2006
Hello,

Sorry for the second post on this thread ...

I explained every steps here

1. script
root@FRAPRB2BADE1 # cat test-rsh
#!/usr/bin/ksh

rsh 172.16.73.38 ls -l 2>>test.log

2. run the script as background processes
root@FRAPRB2BADE1 # nohup ksh test-rsh &
Sending output to nohup.out
[1] 6476
root@FRAPRB2BADE1 #

[1]+ Stopped nohup ksh test-rsh

3. grep the process
root@FRAPRB2BADE1 # ps -ef | grep test-rsh
root 6476 6431 0 17:37:50 pts/2 0:00 ksh test-rsh

4. type exit
root@FRAPRB2BADE1 # exit
exit
There are stopped jobs.

5. grep the process
root@FRAPRB2BADE1 # ps -ef | grep test-rsh
root 6476 6431 0 17:37:50 pts/2 0:00 ksh test-rsh

root@FRAPRB2BADE1 # exit
exit
There are stopped jobs.

6. grep the process
root@FRAPRB2BADE1 # ps -ef | grep test-rsh
root 6476 6431 0 17:37:50 pts/2 0:00 ksh test-rsh

root@FRAPRB2BADE1 # exit
exit

7. grep the process
root@FRAPRB2BADE1 # ps -ef | grep test-rsh
root@FRAPRB2BADE1 #

When i grep the process in the last statement....nothing is showing??

I want to know the root cause for this...

Please help me ..... It's very interesting to know the reason

-------------
vastare
# 5  
Old 01-19-2006
your test is still terminating after the lone "ls -l" call ... you need to create a script that runs a command loop (see below) and then copy that over to the remote server and then test with that ...

Code:
while true
do
    ls -l /dir/file
done

# 6  
Old 01-20-2006
rsh problem

Hi,

Thank you, very much....

The rsh problem is solved.

If you want to run the rsh in a bcakground, use -n option with the rsh command.

Here is the proper syntax to use the rsh (remote shell) command without having the remote shell remain active until the remote command is completed.

rsh -n machine 'command >&/dev/null </dev/null &'

Where machine is the name of the remote computer and command is the remote command to be performed.
This works because the -n flag attaches the rsh's standard input to /dev/null so you can execute the complete rsh command in the background of the local computer. Also, the input/output redirections on the remote computer (the stuff inside the single quotes) makes rsh think the session can be terminated since there is no data flow. In all truth, you don't have to use /dev/null. Any filename will work.

Smilie Smilie Smilie Smilie

Ex:

while true
do

#rsh -n remote-IP command >>logfile
rsh -n 172.16.73.26 ls -l >>remote.log

done


-------------
vastare

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. AIX

Help with rsh problem

Hi all, just after a bit of help.. I am attempting to read in the contents of a flat text file from one system to another using 'rsh', i have this setup over around 15 machines and it works for them all except one. On this one machine it just reads in a blank line for some reason. The machine... (21 Replies)
Discussion started by: forefather1977
21 Replies

2. UNIX for Dummies Questions & Answers

RSH/rlogin problem

Hello, When I try and RSH/RLOGIN onto a box with user root, I get the prompt but the username/password combination NEVER work. I have the password up properly on the host machine. Does rsh/rlogin not make use of ./etc/passwd and /etc/shadow? (1 Reply)
Discussion started by: mojoman
1 Replies

3. UNIX for Dummies Questions & Answers

Problem using RSH

Hi, I have an old solaris 2.6 box and I need to copy all the data from the hard drive onto another machine. It does not have ssh installed so I am forced to use rsh. My plan was to execute the rcp command from the solaris box to a Centos 5 machine. I have installed rsh client and server on my... (1 Reply)
Discussion started by: mojoman
1 Replies

4. Shell Programming and Scripting

rsh connection problem

I am trying to connect to a remote server using rsh. first i have given the following command. $ rsh 242.13.45.54 -l now i got the following message "connect to address 242.13.45.54: Connection refused Trying krb4 rlogin... connect to address 242.13.45.54: Connection refused trying... (1 Reply)
Discussion started by: ravi raj kumar
1 Replies

5. Shell Programming and Scripting

rsh problem

Dear, I am trying to execute a script in the X machine by remote logging from machine Y. Note that in the X machine in host file the ip and the hostname of the Y is defined and in the .rhosts the hostname and the username of the Y is defined. By using the following: rsh X -l username -n "sh... (0 Replies)
Discussion started by: tontal
0 Replies

6. Shell Programming and Scripting

rsh problem in ksh

On a SUN cluster (ksh - Solaris 8 SPARC) I run a script which at some time has to perform a rsh command on the alternate node but with some other user (let's say "oper") so it should be like: rsh su - oper -c APP_COMMAND -paramters When I run the script APP_COMMAND is done but without taking... (2 Replies)
Discussion started by: heartwork
2 Replies

7. Shell Programming and Scripting

rsh problem

I tried to execute by rsh a script, but I did not succeed. You can execute only commnads (not scripts) by rsh or there are some other restrictions?!? root@a1 #pwd / root@a1 #rsh a2 monitor ksh: monitor: not found On the other hand: root@a1 #rsh a2 root@a2 #pwd / root@a2 #ls monitor... (9 Replies)
Discussion started by: heartwork
9 Replies

8. Shell Programming and Scripting

rsh problem

hey, I'v a problem when I use rsh. When it logs in, it goes my home directory. I want it to go directly to my working directory. An idea I had was to redirect pwd to a file (pwd > somefile) and then once I'v rsh'd, cd to that path. I don't know how to read from the file to use as a parameter for... (2 Replies)
Discussion started by: Bacchus
2 Replies

9. UNIX for Dummies Questions & Answers

RSH password problem

Hello, I am currently trying to execute a command in a Windows machine from a UNIX server. In order to do this, I am using the RSH command in UNIX but whenever i do this I am getting this error "RSHD: <username>: could not retrieve password: Please login and run rsetup." I log in via the... (0 Replies)
Discussion started by: punyenye
0 Replies

10. UNIX for Dummies Questions & Answers

problem with rsh

Hi all I have checked the archives and cannot find a solution. I get a permission denied error, however all the suggestions donot help. here is the scenario root@OPSBOX#/>rsh OPSBOX ls -l rshd: 0826-813 Permission is denied. root@OPSBOX#/>pg .rhosts OPSBOX root OPSBOX ... (1 Reply)
Discussion started by: jhansrod
1 Replies

Featured Tech Videos