To learn Linux, start with these 5 commands:
man, ls, cd, pwd, more
To compare Microsoft DOS commands with Linux see these pages:
http://linuxmeister.net/Microsoft/DOS-Linux-cmds.html
http://linuxmeister.net/Microsoft/PowerShell-vs-BASH-commands-compared.html
http://linuxmeister.net/Microsoft/LOADTEST-OS-COMPARISON.html
In Linux, we have many ways to show the contents of a file, more is recommended because it filters,
 see also:  “less”, “cat”, “tac” and other commands (use apropos to find other cmds, and man to learn about them)