/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 vote212 views1 answer
Cannot remove '/etc/resolv.conf': Operation not permitted
Shell/Bash
1 vote257 views1 answer
Show weather top bar in ubuntu
Shell/Bash
5 votes193 views6 answers
Git remove file from history
Shell/Bash
1 vote209 views2 answers
Uninstall en_web_core md
Shell/Bash
15 votes215 views3 answers
Remove nginx from ubuntu
Shell/Bash
0 vote221 views1 answer
How to install bokeh version 2.4.1 rather than 2.4.2
Shell/Bash
0 vote216 views1 answer
Linux delete files in folders without deleting the folder
Shell/Bash
0 vote194 views1 answer
Inport files to google colab from github
Shell/Bash
0 vote200 views3 answers
Flatpak in linux
Shell/Bash
0 vote210 views2 answers
List all local branches off a branhc
Shell/Bash