Ssh Config File Port

So I typically run this command a lot: ssh -L 5901:myUser@computer.myHost.edu:5901. I use it to do VNC over SSH. How do I convert that command into something that will work in a /.ssh/config file? Ex: host yam HostName yam.myHost.edu User myUserName. All I want to do is type: ssh yam. And have it open a SSH shell with a local listen port, and a remote port forwarded to it. Ssh (1) obtains configuration data from the following sources in the following order: 1. Command-line options 2. User's configuration file (/.ssh/config) 3. System-wide configuration file (/etc/ssh/sshconfig) For each parameter, the first obtained value will be used. The OpenSSH server reads a configuration file when it is started. Usually this file is /etc/ssh/sshdconfig, but the location can be changed using the -f command line option when starting sshd. Some organizations run multiple SSH servers at different port numbers, specifying a different configuration file for each server using this option.

What is a CONFIG file?

A CONFIG file is known as configuration file; used to configure the parameters and primary settings for several computer softwares. The config File format is used for server processes, software applications, and operating system settings. Some softwares only read their configuration files at their startup. Others check the configuration files for changes periodically. A programmer can write code to instruct a software to read the configuration files again and again after certain time of period and apply the changes to the current process. There are no definitive standards or strong conventions for CONFIG file sysntax. For example, Microsoft’s Web.config file is belongs to CONFIG file format, which consists of an XML based tagsets; can be edited with Microsoft Visual Studio or any other text editor.

Examples of configuration files:

Since, the configuration files are not created by following any rules, standrads or conventions, these files might have written by using different formats. A .config file might be based on XML, JSON or any other format. Following are the examples of configuration files for well known operating systems and softwares:

Configuration files in Linux

Every Linux program is an executable file keeping the list of opcodes the CPU executes to accomplish typical operations. The operations of almost every program can be customized to your requirements by changing its configuration files. Several configuration files in the Linux system are in the /etc directory. The configuration files can be classified into the following categories:|Category|Example| Comments|—|—|—||Access files|/etc/host.conf|Tells the network domain server how to look up hostnames.||Booting and login/logout|/etc/rc.d/rc.local|Not official. May be called from rc, rc.sysinit, or /etc/inittab.||File system|/etc/mtools.conf|Configuration for all the operations (mkdir, copy, format, etc.) on a DOS-type filesystem.||System administration|/etc/shells|Holds the list of possible “shells” available to the system.||Networking|/etc/gated.conf|Configuration for gated. Used only by the gated daemon.||System commands|/etc/logrotate.conf|Configuration for the Dynamic Linker.||Daemons|/etc/httpd.conf|The configuration file for Apache, the Web server. This file is typically not in /etc.||User programs| /etc/lynx.cfg| Proxy settings|