How to execute multiple unix commands in one session from java


 
Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users How to execute multiple unix commands in one session from java
# 1  
Old 01-15-2009
Question How to execute multiple unix commands in one session from java

Hi,

Iam trying to code in java and wanted to run the commands in the Unix remote servers. I have the following code to run multiple GREP commands in a single session.
But when i execute this, the first command executes successfully, whereas from the next line it says
"Exception Occured
java.io.IOException: A remote execution has already started."

Following is my code snippet :

FileReader fr =
new FileReader("grepcommands.txt");
BufferedReader br =
new BufferedReader(fr);
String inputscript=
"";
sess= conn.openSession();
while((inputscript=br.readLine())!=null){
sess.execCommand(inputscript);

}

sess.close();

It would be great if anyone can provide me the solution for this.
# 2  
Old 01-15-2009
Would this logic work?

FileReader fr =
new FileReader("grepcommands.txt");
BufferedReader br = new BufferedReader(fr);
String inputscript="";
String allscript = "";
sess= conn.openSession();
while((inputscript=br.readLine())!=null){
allscript.append(inputscript + ";")
}

sess.execCommand(allscript);

sess.close();

Explaination:
Multiple execution can be done in sequence when given with semicolon ";"
cmd1; cmd2; cmd3; cmd4

My assumption is exeCommand executes the commands as shell does...
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Ssh multiple hops to execute commands with arguments

Hi I need to write a script to ssh through several hops (e.g. HostA-HostB-HostC-HostD), where Host A does not have direct assess to HostC ; HostB cannot access HostD directly. when I ssh 3 hops and run command with arg1, arg2 and redirect the output to a file, e.g. HostA> ssh -t HostB ssh -t... (3 Replies)
Discussion started by: chiensh
3 Replies

2. Shell Programming and Scripting

Using sed to execute multiple commands

Let's say I have a file called test.out. In this file I want to do the following: 1. Search for DIP-10219 and with this: 2. Remove everything in front of cn= 3. Remove everything after *com 4. Remove duplicate lines 5. Replace ( with \( 6. Replace ) with \) For 1-3 I have figured out this... (11 Replies)
Discussion started by: exm
11 Replies

3. Shell Programming and Scripting

How to execute multiple commands in one shot?

for example: I'm greping the process where i can get the location of the file $ ps -ef | grep LLAWP | awk {'print $9'} | tail -1 /Hostname/ihs/INSTANCE2/conf/WebAgent.conf then I need to display second line of WebAgent.conf file: $ cat /Hostname/ihs/INSTANCE1/conf/WebAgent.conf | head... (2 Replies)
Discussion started by: raghur77
2 Replies

4. Shell Programming and Scripting

connect to multiple servers using SSH and execute commands

Requirement: Run a shell script with below inputs file name checksum path the script should go to multiple servers (around 35) and verify the input cksum and if there is a mismatch display a simple message to the user that cksum verification failed. host details, user id /... (1 Reply)
Discussion started by: amicableperson
1 Replies

5. Shell Programming and Scripting

Execute commands from script in current bash session

I have a file as follows: cat /etc/mxg/ssh-hostsmx.example1.com.au:2225 mx2.example2.com.au:2225 mx.example3.com.au:2225 mail.example4.com.au:2225 mail.example5.org.au:2225 mail.example6.com.au:2225I want to dynamically create aliases for quick access to these servers from bash. I wrote... (4 Replies)
Discussion started by: jelloir
4 Replies

6. UNIX for Dummies Questions & Answers

cron used to execute multiple commands

have to run multiple commands at a specified time by the user... (3 Replies)
Discussion started by: hemaa
3 Replies

7. Shell Programming and Scripting

Execute multiple commands in a find

I am checking that a file is older than a reference file that I build with a touch command before processing it. If it is not old enough, I want to sleep for an hour and check again. My problem is if it is old enough to process, I want to exit when I am done, but I cannot find a way to exit... (2 Replies)
Discussion started by: prismtx
2 Replies

8. Solaris

I am not able to login in gnome session and java session in Sun solaris 9& 10

I am not able to login in gnome session and java session in Sun solaris 9& 10 respectively through xmanager as a nis user, I am able to login in common desktop , but gnome session its not allowing , when I have given login credentials, its coming back to login screen, what shoul I do to allow nis... (0 Replies)
Discussion started by: durgaprasadr13
0 Replies

9. Shell Programming and Scripting

Can Xargs execute multiple commands of evry input file

Hello , I am trying to print the footer of evry file in the given directory with xargs command like follows ls -1 | xargs -I {} gzcat {} | tail -1 now problem with this is only last file foooter is getting printed as " | tail -1 " is getting executed for the last file. I know this can... (4 Replies)
Discussion started by: nilesrex
4 Replies

10. Shell Programming and Scripting

how do i get my script to execute multiple commands?

New to shell scripting. I can't get my script to execute multiple commands. Here's the code. It's a menu script. #!/bin/ksh clear print "SDE MENU" PS3="SDE MENU, enter choice:" select clean_menu in "tasdedev instance 5151" "orkindev instance 5155" "tasdetst instance 5157" "orkinsys... (1 Reply)
Discussion started by: hvincent
1 Replies
Login or Register to Ask a Question