/Shell/Bash/Bash check if string does not exist in file

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 vote182 views1 answer
Ubunto END-USER LICENSE AGREEMENT FOR MICROSOFT SOFTWARE
Shell/Bash
1 vote159 views2 answers
You are running `create-react-app` 4.0.3, which is behind the latest release (5.0.0). We no longer support global installation of Create React App.
Shell/Bash
0 vote222 views1 answer
Flutter doctor Xcode installation is incomplete; a full installation is necessary for iOS development.
Shell/Bash
0 vote157 views1 answer
Run shell script remotely using ssh
Shell/Bash
12 votes247 views3 answers
How to pip install on command prompt
Shell/Bash
1 vote162 views1 answer
Apache version mac
Shell/Bash
1 vote163 views1 answer
Open git gui from command line
Shell/Bash
0 vote176 views1 answer
Move all file in linux commands
Shell/Bash
0 vote248 views1 answer
Command prompt change directory to network drive
Shell/Bash
0 vote180 views1 answer
Mover linux ssh
Shell/Bash