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

1 vote129 views1 answer
Generate py file from ui
Shell/Bash
0 vote129 views1 answer
Node check installed modules
Shell/Bash
0 vote136 views1 answer
Reverse serach linux
Shell/Bash
0 vote128 views1 answer
Install JDK on Rocky Linux 8
Shell/Bash
0 vote130 views1 answer
Failed to start docker.service: Unit docker.service is masked
Shell/Bash
11 votes140 views4 answers
Ubuntu The following signatures couldn't be verified because the public key is not available: NO_PUBKEY
Shell/Bash
5 votes274 views4 answers
Install jenkins ubuntu
Shell/Bash
0 vote98 views1 answer
Volume buttons not working ubuntu 18.04
Shell/Bash
0 vote143 views2 answers
Reset repo
Shell/Bash
0 vote140 views1 answer
Git move change from master to new branch
Shell/Bash