*[http://man7.org/linux/man-pages/man1/ls.1p.html ls]<br>

*[http://man7.org/linux/man-pages/man1/cal.1.html cal]<br>

*[http://man7.org/linux/man-pages/man1/file.1.html who, w]<br>

*[http://man7.org/linux/man-pages/man1/wget.1.html whoami, who am i]<br>