Add file command.

#14

#11

Given example does not initialize an array - there is a probably typo in code sample.

fixes#20

fixes#26

* Add whatis command

* Edit mistype

The current description of the OR operator ("one of the statements is true") implies that only one of the statements in the expression can be true, as in an XOR. Adding "at least" to clarify.

1. Reformatting of Bash tutorial.
2. Link for more help n contribution inserted.

chmod function updated for beter clarity.

* chown added

* add chown command

* add chown command

#36)

* add process monitoring section , add nohup command and move kill and killall inside

* nohup and & command

* Add index for navigation in network section and remove todo

* Update README.md

…ables. (#49)

* keeping environment variables.

Useful way to keep the environment variables.

* Add a ~/bin directory to access scripts easily

Useful way to access yours scripts easily.

miss typing
farget_folder -> target_folder

mis-typing
your-> you

Also fixed a formatting typo.

https://unix.stackexchange.com/questions/29608/why-is-it-better-to-use-usr-bin-env-name-instead-of-path-to-name-as-my

*  fix typos

*  fix assigning values to array indexes

The text is very unreadable in several sections thanks to the use of `>` (quote syntax in Markdown), so I replaced it with codeblocks.