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chfn is used to change your finger information. This information is stored in the /etc/passwd file, and is displayed by the finger program. The Linux finger command will display four pieces of information that can be changed by chfn : your real name, your work room and phone, and your home phone.
 
 
 
 
In interactive [...]

arch is equivalent to uname -m.
On current Linux systems, arch prints things such as “i386″, “i486″, “i586″, “alpha”, “sparc”, “arm”, “m68k”, “mips”, “ppc”.

pavs

The appres program prints the resources seen by an application (or subhierarchy of an application) with the specified class and instance names. It can be used to determine which resources a particular program will load. For example,
% appres XTerm
will list the resources that any xterm program will load. If no application class is specified, the [...]

findsmb is a perl script that prints out several pieces of information about machines on a subnet that respond to SMB name query requests. It uses nmblookup(1) and smbclient(1) to obtain this information.
The output of findsmb lists the following information for all machines that respond to the initialnmblookup for any name: IP address, NetBIOS name, [...]