Sometimes we face problems while starting the CSF firewall on the server and get the following mentioned error:
Unable to open version.txt: No such file or directory at /usr/sbin/csf line 1773.
This error is basically due to the CSF version file missing on the server. To resolve this issue you can simply follow the below steps:
1) Go to folder
cd /etc/csf
2) Create a text file in this folder with name “version.txt”
vi version.txt
3) Now insert the CSF version number in this file eg: 5.17 & assign the ownership of root.root to the file
chown root.root version.txt
4) Once done assign the permission to the file
chmod 600 version.txt
5) Now just restart your CSF
csf -r
Error should be resolve now.