grep warning

[AdiRMG]

I get grep: warning: stray \ before : when I run the scrip on Unraid.

Is something wrong or is it expected?

The command is: bash /path/to/script/rsync_tmbackup.sh --log-dir /path/to/log/folder /path/to/source user@destination:/path/to/remote/folder

I need to run it like bash /path/to/script/rsync_tmbackup.sh because if i run it like rsync_tmbackup.sh i get -bash: rsync_tmbackup.sh: command not found