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Full Discussion: netstat command
Top Forums Shell Programming and Scripting netstat command Post 302571773 by dips_ag on Tuesday 8th of November 2011 08:33:01 AM
netstat command


In my project we use sftp with batch mode (password less) script in parallel for 14 sessions which connects to 2 different servers alternatively i.e. 7 connects to one server say server1 and the other 7 connects to say server 2.

Now the problem is that these 14 sessions are run in parallel then only 2 or 3 of them get succeeded while the rest runs for a very long time like 2 hours and then gets timed out. The unix admins told that sftp script is not closing the connection gracefully.

The command which I use in the sftp script is

sftp -b <batch file> user@ftp_address

They told me to check if the connections are closed or not can be checked by command. So I executed the below command even when the sessions were not running.

netstat -an | grep <IP address of the GUI tool which calls the script>

This shows something like below:

tcp        0      0 ::ffff:XXX.XX.XXX.XX:XX    ::ffff:YY.YYY.YY.YYY:ZZZZ   ESTABLISHED
tcp        0      0 ::ffff:XXX.XX.XXX.XX:XX    ::ffff:YY.YYY.YY.YYY:MMMM  ESTABLISHED

And seeing the above "ESTABLISHED" o/p they are claiming that my script is not closing the FTP connection!! I'm really confused as to how to close the SFTP connection when using it in batch mode there is no explicit command like "bye" with password-less sftp. Can anybody please help me understand that if the unix admins are right in their claim that really my script doesn't close the connection automatically and if yes then how to close it?


Last edited by pludi; 11-08-2011 at 09:39 AM..
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SSH2_SFTP_MKDIR(3)							 1							SSH2_SFTP_MKDIR(3)

ssh2_sftp_mkdir - Create a directory

bool ssh2_sftp_mkdir (resource $sftp, string $dirname, [int $mode = 0777], [bool $recursive = false]) DESCRIPTION
Creates a directory on the remote file server with permissions set to $mode. This function is similar to using mkdir(3) with the ssh2.sftp:// wrapper. PARAMETERS
o $sftp - An SSH2 SFTP resource opened by ssh2_sftp(3). o $dirname - Path of the new directory. o $mode - Permissions on the new directory. o $recursive - If $recursive is TRUE any parent directories required for $dirname will be automatically created as well. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Creating a directory on a remote server <?php $connection = ssh2_connect('', 22); ssh2_auth_password($connection, 'username', 'password'); $sftp = ssh2_sftp($connection); ssh2_sftp_mkdir($sftp, '/home/username/newdir'); /* Or: mkdir("ssh2.sftp://$sftp/home/username/newdir"); */ ?> SEE ALSO
mkdir(3), ssh2_sftp_rmdir(3). PHP Documentation Group SSH2_SFTP_MKDIR(3)

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