Shell script - Find number of times a specific alphabet in a word 

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 For loop in shell script

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 If else in shell script

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Shell script tutorial  - set

This script shows the importance of set command.

set -x #debug mode

set - e #exit the script when there is an error

set -o pipefail #(if there is pipe used in script, set -e won't fail, hence we should also use set -o).

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