/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

32 votes177 views2 answers
Delete .git folder
Shell/Bash
0 vote193 views2 answers
Bash list package dependencies
Shell/Bash
0 vote167 views1 answer
Fix errors occurred during update in linux
Shell/Bash
0 vote197 views1 answer
SHOULD AVOID - SECURITY RISK
Shell/Bash
3 votes170 views1 answer
Ssh-keygen and ssh-copy-id
Shell/Bash
2 votes168 views3 answers
Install node js in manjaro
Shell/Bash
0 vote197 views1 answer
Gimp : Dépend: libgimp2.0 (>= 2.10.18) mais ne sera pas installé Dépend: libgimp2.0 (<= 2.10.18-z) mais ne sera pas installé Dépend: libgegl-0.4-0 (>= 0.4.22) mais ne sera pas installé
Shell/Bash
0 vote207 views1 answer
Yum add proxy
Shell/Bash
0 vote169 views1 answer
Change directory on WSL
Shell/Bash
2 votes174 views2 answers
Git remove last merge commit
Shell/Bash