Bash if substring in string

Checking if a substring exists in a string bash

string='Haystack';

if [[ $string =~ "Needle" ]]
then
   echo "It's there!"
fi

Bash if substring

string='Hi substring' #To check if string has "Mylong" substring do
if [[ $string == *"substring"* ]]; then
  echo "String has substring"
fi

Bash if substring in string

# 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'

case $STR in

  *"$SUB"*)
    echo -n "It's there."
    ;;
esac

Source: linuxize.com

Similar codes

2 votes335 views1 answer
Git case sensitive folder
Shell/Bash
0 vote324 views1 answer
Gpg encrypt decrypt
Shell/Bash
24 votes338 views3 answers
No receipt for 'com.apple.pkg.CLTools_Executables' found at '/'
Shell/Bash
0 vote317 views1 answer
Untrack lfs file
Shell/Bash
0 vote331 views1 answer
Xampp aliases
Shell/Bash
16 votes440 views4 answers
License for package Android SDK Build-Tools 30.0.2 not accepted.
Shell/Bash
0 vote314 views1 answer
Rails server localhost use ip
Shell/Bash
0 vote346 views3 answers
Ir para comit
Shell/Bash
1 vote341 views1 answer
How to delete a folder from the terminal ubuntu
Shell/Bash
0 vote346 views1 answer
Flutter pubspec install
Shell/Bash