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Full Discussion: Help understanding what this ls -l command is checking in a script
Top Forums UNIX for Beginners Questions & Answers Help understanding what this ls -l command is checking in a script Post 303039571 by jim mcnamara on Wednesday 9th of October 2019 06:52:24 PM
Old 10-09-2019
The command connects to a remote server, does and ls -l of a directory, which list files in the directory on the remote machine. The command is between the tic characters '

The output of the ls command goes into the bit bucket (kind of like a black hole for output). The status of the ssh connect and ls (success ( == 0 ) or failure code (== non-zero) ) is stored in the variable $status.

A sort of roundabout way to see if the remote machine is awake on the network, and if the directory exists over there. The options -qno for ssh:
-n used to run in the background when ssh does not read from user's stdin (terminal)
-q quiet mode, stops extra messages
-o (option) turn off strict host key checking. I wonder why...
This User Gave Thanks to jim mcnamara For This Post:
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LEARN ABOUT OPENSOLARIS

ssh-socks5-proxy-connect

ssh-socks5-proxy-connect(1)					   User Commands				       ssh-socks5-proxy-connect(1)

NAME

       ssh-socks5-proxy-connect - Secure Shell proxy for SOCKS5

SYNOPSIS

       /usr/lib/ssh/ssh-socks5-proxy-connect
	    [-h socks5_proxy_host]
	    [-p socks5_proxy_port] connect_host connect_port

DESCRIPTION

       A proxy command for ssh(1) that uses SOCKS5 (RFC 1928). Typical use is where connections external to a network are only allowed via a socks
       gateway server.

       This proxy command does not provide any of the SOCKS5 authentication mechanisms defined in RFC 1928. Only anonymous connections are  possi-
       ble.

OPTIONS

       The following options are supported:

       -h socks5_proxy_host    Specifies the proxy web server through which to connect. Overrides the SOCKS5_SERVER environment variable.

       -p socks5_proxy_port    Specifies  the  port  on  which	the  proxy  web  server  runs. If not specified, port 80 is assumed. Overrides the
			       SOCKS5_PORT environment variable.

OPERANDS

       The following operands are supported:

       socks5_proxy_host    The host name or IP address (IPv4 or IPv6) of the proxy.

       socks5_proxy_port    The numeric port number to connect to on socks5_proxy_host.

       connect_host	    The name of the remote host to which the socks gateway is to connect you.

       connect_port	    The numeric port number of the socks gateway to connect you to on connect_host.

EXAMPLES

       The recommended way to use a proxy connection command is to configure the ProxyCommand in ssh_config(4) (see  Example  1  and  Example  2).
       Example 3 shows how the proxy command can be specified on the command line when running ssh(1).

       Example 1 Setting the proxy from the environment

       The following example uses ssh-socks5-proxy-connect in ssh_config(4) when the proxy is set from the environment:

	 Host playtime.foo.com
	     ProxyCommand /usr/lib/ssh/ssh-socks5-proxy-connect 
		 playtime.foo.com 22

       Example 2 Overriding proxy environment variables

       The following example uses ssh-socks5-proxy-connect in ssh_config(4) to override (or if not set) proxy environment variables:

	 Host playtime.foo.com
	     ProxyCommand /usr/lib/ssh/ssh-socks5-proxy-connect -h socks-gw 
		 -p 1080 playtime.foo.com 22

       Example 3 Using the command line

       The following example uses ssh-socks5-proxy-connect from the ssh(1) command line:

	 example$ ssh -o'ProxyCommand=/usr/lib/ssh/ssh-socks5-proxy-connect 
	     -h socks-gw -p 1080 playtime.foo.com 22' playtime.foo.com

ENVIRONMENT VARIABLES

       SOCKS5_SERVER	Takes socks5_proxy_host operand to specify the default proxy host.

       SOCKS5_PORT	Takes socks5_proxy_port  operand to specify the default proxy port.

EXIT STATUS

       The following exit values are returned:

       0     Successful completion.

       1     An error occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWsshu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Stable			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ssh(1), ssh-http-proxy-connect(1), ssh_config(4), attributes(5)

SunOS 5.11							    30 Oct 2002 				       ssh-socks5-proxy-connect(1)
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