Username – you should certainly know this
Password – don’t expect a real password here, as every password in linux is either hashed or encrypted by a one way algorithm, except in case the application is a poor one.
UID – User ID
GID – Group ID
Description : like a comment in blue color
User Home Directory : the directory where user heads out after the login.
Command or shell path : Usually it is some shell like sh,bash,awk,ksh. as the application choose to include a path in bash(and design accordingly) rather than developing a complete shell.
There’s also a similar one called, shadow @ /etc/shadow. it contains the hashed data of passwords. As they are formed by one way algorithms, it impossible to crack. There are some ways like comparing two hashes of similar keys and predicting the one way function formulae(only for the weakest of all).