Vi Commands

For this Purpose	Use this vi Command Syntax
To insert new text	esc + i ( You have to press 'escape' key then 'i')
To save file	esc + : + w (Press 'escape' key then 'colon' and finally 'w')
To save file with file name (save as)	esc + : + w "filename"
To quit the vi editor	esc + : + q
To quit without saving	esc + : + q!
To save and quit vi editor	esc + : + wq
To search for specified word in forward direction	esc + /word (Press 'escape' key, type /word-to-find, for e.g. to find word 'shri', type as /shri)
To continue with search	n
To search for specified word in backward direction	esc + ?word (Press 'escape' key, type word-to-find)
To copy the line where cursor is located	esc + yy
To paste the text just deleted or copied at the cursor	esc + p
To delete entire line where cursor is located	esc + dd
To delete word from cursor position	esc + dw
To Find all occurrence of given word and Replace then globally without confirmation	esc + :$s/word-to-find/word-to-replace/g For. e.g. :$s/mumbai/pune/g Here word "mumbai" is replace with "pune"
To Find all occurrence of given word and Replace then globally with confirmation	esc + :$s/word-to-find/word-to-replace/cg
To run shell command like ls, cp or date etc within vi	esc + :!shell-command For e.g. :!pwd

How to add PHP tags to blogs

Hey guys i've found out how to add php tags and hence examples to the blog. We just have to replace the '<' symbol in tags with a '<' statement, which will render the '<' symbol for us. Its as easy as that. The problem is that google or blogspot server supports the php and hence when i quote examples, they were actually parsing it, i.e, executing the php code. So in order to prevent that we'll render the '<' symbol in the other way, and presto it works. Also put the examples within a <pre> </pre>, it will show the examples as a code-fragment(i.e, in that style).
Now i'll quote more php examples in the blog.