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bash check if string contains substring Code Example
bash if substring 
string='Hi substring' #To check if string has "Mylong" substring do
if [[ $string == *"substring"* ]]; then
  echo "String has substring"
fi
checking if a substring exists in a string bash 
string='Haystack';

if [[ $string =~ "Needle" ]]
then
   echo "It's there!"
fi
bash check if string contains substring 
# Example usage:
FULLSTRING='Full string to search'
if [[ $FULLSTRING == *"ll str"* ]]; then
	echo "The substring 'll str' is in the full string."
fi

# Example to check for two substrings:
FULLSTRING='Full string to search'
if [[ $FULLSTRING == *"Full"* && $FULLSTRING == *"to"* ]]; then
	echo "The substrings 'Full' and 'to' are in the full string."
fi

# Note, see the following two links for why [[ ]] is used:
https://serverfault.com/questions/52034/what-is-the-difference-between-double-and-single-square-brackets-in-bash
http://mywiki.wooledge.org/BashFAQ/031
Source: stackoverflow.com
bash substring test 
#!/bin/bash

STR='GNU/Linux is an operating system'
SUB='Linux'

if grep -q "$SUB" <<< "$STR"; then
  echo "It's there"
fi
Source: linuxize.com



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Type:
 Code Example
Category:
 Coding
Sub Category:
 Code Example
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