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

0 vote325 views1 answer
How to open powershell in windows container
Shell/Bash
1 vote351 views1 answer
Copy first 10 lines of a file to another file in unix
Shell/Bash
1 vote305 views1 answer
Cut command in unix
Shell/Bash
-1 vote324 views5 answers
Ssh keygen github
Shell/Bash
11 votes316 views2 answers
Bash script: compare two string
Shell/Bash
0 vote334 views1 answer
Find jpg or png
Shell/Bash
24 votes337 views2 answers
Mongo shell commands
Shell/Bash
10 votes327 views1 answer
Editor de audio
Shell/Bash
0 vote338 views1 answer
Retrieve Linux command line history by date
Shell/Bash
4 votes335 views5 answers
Install apache ubuntu
Shell/Bash