UNIX : Using IF in bash

The IF statement is used to test the given condition and based on the truth value of that the expression the statement followed is executed.Otherwise the else part is executed.

The basic structure of if is as follows.

If [[ expression ]];then

expression

elif [[expression ]];then

expression

else

expression

1) Integer comparison

2) String comparison

3) Using multiple conditions in IF statement

4) Compare regular expression in bash

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Pokemon Go download link

Pokemon go has become the buzz word in tech industry now. Nintendo, the Japanese video game company are the creates of this game. Its first of it kind to integrate a game with augmented reality , so people has to go out to real world with there android or iPhone to catch em all . You can download Pokemon go from this link.

Primitive datatypes in hive

String data types STRING VARCHAR CHAR TINYINT SMALLINT INT BIGINT FLOAT DOUBLE DECIMAL BOOLEAN TIMESTAMP DATE

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Sometimes we need to ignore multiple lines with certain words and get the list out of the file. usually it will be a log file to read . The below grep command can be used to ignore multiple words present in a text file. Lets say the file contain $ cat list.txt apple orange apple banana papaya Now we need to ignore line with orange , banana and papaya . So we can use the below grep command. $ cat list.txt | grep -Ev "orange|banana|papaya" apple apple It will ignore lines with the words in -v part of grep.

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