/Shell/Bash/Linux test if string exists in file

Linux test if string exists in file

if grep -Fxq "string" file.txt; then 
	echo "Match"
else 
	echo "No match"
fi

Bash check if string does not exist in file

Just use grep with flags 'F' (fixed string), 'x' (exact match) and 'q'
(quiet output) in order to check if a word string is in a file
if ! grep -Fxq "string" file.txt; then #do some code...#; fi

Similar codes

5 votes173 views2 answers
Commit unstaged changes to new branch
Shell/Bash
1 vote164 views1 answer
Scp copy recursive
Shell/Bash
16 votes160 views6 answers
Install pandas in python
Shell/Bash
0 vote172 views1 answer
Comment installer virtualbox sur kali linux
Shell/Bash
1 vote180 views1 answer
Linux auto suspensd stop
Shell/Bash
0 vote249 views1 answer
Install rtools rstudio
Shell/Bash
5 votes178 views1 answer
Git how to commit changes to another branch
Shell/Bash
0 vote149 views1 answer
Set gunicorn timeout via command
Shell/Bash
0 vote169 views2 answers
The configuration file now needs a secret passphrase (blowfish_secret).
Shell/Bash
17 votes124 views2 answers
Git check upstream
Shell/Bash