How to run windows games and applications on linux ?

Well the most basic thing required is WINE (WINE Is Not an Emulator or Windows Environment)

(Note you must have direct rendering enabeled use glxinfo to check)

1)Install Wine

Fedora Users : su yum install wine or use yum Ex or use Smart Package Manager.
Ubuntu /Debian Users: su apt-get install wine
OpenSUSE: Use Yast NOTE: YOU MUST HAVE PROPER REPOSITORIES LIKE PACMAN OR LIVNA

or just download .rpm or .deb package and install.

Bash Commands List

Well here is a basic index of commands used in bash found it at a great site  here

For More Info on the commands visit the above link:

alias          Create an alias
apropos     Search Help manual pages (man -k)
awk           Find  and Replace text, database sort/validate/index

break         Exit from a loop
builtin        Run a shell builtin
bzip2         Compress or decompress named file(s)

cal             Display a calendar
case           Conditionally perform a command
cat             Display the contents of a file
cd              Change Directory
cfdisk        Partition table manipulator for Linux
chgrp        Change group ownership
chmod      Change access permissions
chown      Change file owner and group
chroot       Run a command with a different root directory
cksum       Print CRC checksum and byte counts
clear          Clear terminal screen
cmp           Compare two files
comm        Compare two sorted files line by line
command  Run a command – ignoring shell functions
continue    Resume the next iteration of a loop
cp             Copy one or more files to another location
cron          Daemon to execute scheduled commands
crontab     Schedule a command to run at a later time
csplit        Split a file into context-determined pieces
cut            Divide a file into several parts

date          Display or change the date & time
dc             Desk Calculator
dd             Data Dump – Convert and copy a file