ஆசானுடன் கடைசி நாள்: கலாம் ஆலோசகரின் உணர்வுக் குறிப்புகள் – தி இந்து.
ஆசானுடன் கடைசி நாள்: கலாம் ஆலோசகரின் உணர்வுக் குறிப்புகள் – தி இந்து
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Author Archives: Lekshmana Perumal Murugan
RIP Dr.APJ Kalam Sir
A true inspiration to every one. Even some people hate God also, but a person who always inspired to most people, no one hate.
The most ever speech by Dr.Kalam in European Parliment
Linux Check File Exist or not – Shell Script
The following script used to check the specified file present or not in shell script
#!/bin/bash
#########################################################################################
# This Shell script used to find the specificed
filePath="/home/file-path"
fileName="$filePath/filename.txt"
if [ -f "$fileName" ]
then
echo "$fileName found"
else
echo "$fileName not found"
fi
To check multiple file on same if condtion
filePath="/home/file-path"
fileName="$filePath/filename.txt"
fileName2="$filePath/filename2.txt"
if [ -f "$fileName" ] && [ -f "$fileName2" ]
then
echo "$fileName found"
else
echo "$fileName not found"
fi
Linux zip and unzip
zip and unzip in Linux
- zip all foldrs(data) and move zip to specify folder(data)
zip -r data data/* - unzip and move to specify folder(data)
unzip data.zip -d data/
vi Editor – Searching and Replacing
Searching and Replacing
The formal syntax for searching is:
:s/string
For example, suppose you want to search some text for the string “cherry.” Type the following and press ENTER:
:s/cherry
The first match for “cherry” in your text will then be highlighted. To see if there are additional occurrences of the same string in the text, type n, and the highlight will switch to the next match, if one exists.
The syntax for replacing one string with another string in the current line is
:s/pattern/replace/
Here “pattern” represents the old string and “replace” represents the new string. For example, to replace each occurrence of the word “lemon” in a line with “orange,” type:
:s/lemon/orange/
The syntax for replacing every occurrence of a string in the entire text is similar. The only difference is the addition of a “%” in front of the “s”:
:%s/pattern/replace/
Thus repeating the previous example for the entire text instead of just for a single line would be:
:%s/lemon/orange/
Src From : http://www.linfo.org/vi/search.html
Remove linebreaks in Notepad++
- Highlight the lines you want to join (or use Ctrl + A to select everything)
- Choose Edit → Line Operations → Join Lines from the menu or press Ctrl + J.
It will put in spaces automatically if necessary to prevent words from getting stuck together
Ref:http://superuser.com/questions/518229/how-to-remove-linebreaks-in-notepad
Pilish
Pilish is a style of writing in which the lengths of consecutive words match the digits of the number π (pi).
The following sentence is an example which matches the first fifteen digits of π:
How I need a drink, alcoholic in nature, after the heavy lectures involving quantum mechanics!
The following Pilish poem (written by Joseph Shipley) matches the first 31 digits of π:
But a time I spent wandering in bloomy night;
Yon tower, tinkling chimewise, loftily opportune.
Out, up, and together came sudden to Sunday rite,
The one solemnly off to correct plenilune.
A full-length Pilish novel has been published,which currently holds the record of the longest Pilish text with 10,000 digits.
In order to deal with occurrences of the digit zero, the following rule set was introduced (referred to as Basic Pilish):
In Basic Pilish, each word of n letters represents
(1) The digit n if n < 10
(2) The digit 0 if n = 10
Since long runs of small non-zero digits are difficult to deal with naturally (such as 1121 or 1111211), another rule set called Standard Pilish was introduced:
In Standard Pilish, each word of n letters represents
(1) The digit n if n < 10
(2) The digit 0 if n = 10
(3) Two consecutive digits if n > 10
(for example, a 12-letter word represents the digits 1,2)
The Number
The Difference between a Megabyte (MB) and a Megabit (Mb)
One thing that often gives people confusion is the difference between a Megabyte (used for file size) and a Megabit (used for download speeds). People often assume that a download speed of 1 Megabit per second (1 Mbps) will allow them to download a 1 Megabyte file in one second. This is not the case, a Megabit is 1/8 as big as a Megabyte, meaning that to download a 1MB file in 1 second you would need a connection of 8Mbps. The difference between a Gigabyte (GB) and a Gigabit (Gb) is the same, with a Gigabyte being 8 times larger than a Gigabit.
To calculate how long it will take a file to download over your connection, you can use Google’s simple MB/Mb converter
Cloudflare – Creating a better web and supercharge your website (Free & Premium plan)
- CloudFlare protects and accelerates any website online. Once your website is a part of the CloudFlare community, its web traffic is routed through our intelligent global network. cloudflare automatically optimize the delivery of your web pages so your visitors get the fastest page load times and best performance. cloudflare also block threats and limit abusive bots and crawlers from wasting your bandwidth and server resources. The result: CloudFlare-powered websites see a significant improvement in performance and a decrease in spam and other attacks.
- Services include CDN, Optimizer, Security, Analytics, apps also enterprise plans there.
Ref:
Lekshmana Perumal Murugan 