/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

0 vote140 views1 answer
Refusing to exec crouton from noexec mount
Shell/Bash
0 vote145 views1 answer
View Changes Before Committing
Shell/Bash
1 vote147 views1 answer
Pip freeze for only project requires
Shell/Bash
0 vote142 views3 answers
Uninstall mongo db
Shell/Bash
1 vote140 views1 answer
Error pip install psycopg2-binary ld: library not found for -lssl
Shell/Bash
0 vote142 views1 answer
Simple tutorial js
Shell/Bash
0 vote143 views1 answer
Open wsl as root
Shell/Bash
0 vote155 views1 answer
Aws sli how to delete table
Shell/Bash
0 vote134 views1 answer
Sequence of png images to mp4
Shell/Bash
0 vote141 views2 answers
How To Configure WiFi on Raspberry Pi - NAYCode.com
Shell/Bash