/Shell/Bash/Bash check if string contains substring

Bash check if string contains substring

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 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

Similar codes

2 votes324 views2 answers
Linux cli see screen resolution
Shell/Bash
38 votes281 views5 answers
Remove commit from github
Shell/Bash
0 vote294 views1 answer
Debian kernel ppa
Shell/Bash
2 votes272 views1 answer
Git find unmerged files
Shell/Bash
1 vote300 views1 answer
Linux shell script print environment variables
Shell/Bash
24 votes286 views2 answers
Como instalar telegram ubuntu
Shell/Bash
-2 votes296 views2 answers
How to add existing project to gitlab
Shell/Bash
1 vote304 views1 answer
To check the status of running process On Debian and Ubuntu
Shell/Bash
0 vote306 views1 answer
Ubuntu edit etc host
Shell/Bash
0 vote276 views3 answers
Remove folders from remote git
Shell/Bash