/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

13 votes308 views1 answer
Install slack
Shell/Bash
2 votes323 views2 answers
One drive linux
Shell/Bash
9 votes324 views2 answers
Check ram memory usage linux
Shell/Bash
0 vote326 views1 answer
Crontab run to dev null
Shell/Bash
10 votes372 views3 answers
Conda install from yaml
Shell/Bash
10 votes311 views2 answers
Install ifconfig on ubuntu
Shell/Bash
8 votes371 views4 answers
Install redis on mac
Shell/Bash
2 votes341 views2 answers
Sum column bash
Shell/Bash
0 vote346 views1 answer
Transcode input to output with h264 720p with gpu
Shell/Bash
0 vote330 views1 answer
Failed to start redis-server.service: Unit redis-server.service is masked.
Shell/Bash